def get_roi_perc(self, img, msk, mask_vox):
roi_stat = fsl.ImageStats(in_file=self.img, op_string='-k ' + msk + ' -V')
print(roi_stat.cmdline)
stat_run = roi_stat.run()
stat = float(list(stat_run.outputs.out_stat)[0])
perc = (stat / mask_vox) * 100
return perc
def get_roi_activated_vox(self, msk):
roi_stat = fsl.ImageStats(in_file=self.img,
op_string='-k ' + msk + ' -l 0 -V')
print(roi_stat.cmdline)
stat_run = roi_stat.run()
stat = float(list(stat_run.outputs.out_stat)[0])
return stat
def get_roi_mean_stat(self, msk):
mean_zstat = fsl.ImageStats(in_file=self.img,
op_string='-k ' + msk + ' -m')
print(mean_zstat.cmdline)
stat_run = mean_zstat.run()
zscore = float(stat_run.outputs.out_stat)
return zscore
def Get_Volume(timepoint):
infile = parent_dir+'/FDM/Outputs/Tumor/'+timepoint+'/'+\
os.listdir( parent_dir+'/FDM/Outputs/Tumor/'+timepoint)[0]
Volume = fsl.ImageStats()
Volume.inputs.in_file = infile
Volume.inputs.op_string = '-V'
Vout = Volume.run()
return Vout.outputs.out_stat
def Get_Mean_ADC(timepoint):
infile = parent_dir+'/FDM/Outputs/ADC/'+timepoint+'/'+\
os.listdir( parent_dir+'/FDM/Outputs/ADC/'+timepoint)[0]
maskfile = parent_dir+'/FDM/Outputs/Tumor/'+timepoint+'/'+\
os.listdir( parent_dir+'/FDM/Outputs/Tumor/'+timepoint)[0]
ADC = fsl.ImageStats()
ADC.inputs.in_file = infile
ADC.inputs.op_string = '-k %s -M'
ADC.inputs.mask_file = maskfile
ADCout = ADC.run()
return ADCout.outputs.out_stat
def normalize_image(nifti_input_file):
#from nipype.interfaces.fsl import ImageStats
from nipype.interfaces import fsl
""" This will take an image and scale it so the mean intensity is 100 ...."""
stats = fsl.ImageStats(in_file=nifti_input_file, op_string='-R')
stats_results = stats.run()
### so the -R flag outputs the min and max robust intensity value
# print stats_results.outputs[1]
# So this gets messy quickly...
normalize_image = fsl.ImageMaths(in_file=nifti_input_file,
op_string=' -div ' +
str(stats_results.outputs.out_stat[1]) +
' -mul 1000')
run_image_norm = normalize_image.run()
return run_image_norm.outputs.out_file
def get_workflow(parameters, name=0):
wf = pe.Workflow(name="%04d" % name + "regionGrowing")
wf.base_dir = "/scratch/henry_temp/keshavan/region_growing_test"
n = pe.Node(niu.Function(input_names=[
"inputv", "seeds", "multiplier", "nbhd", "iterations", "timestep",
"smoothingiterations"
],
output_names=["outfile"],
function=getSRGS),
name="srgs")
inputspec = pe.Node(niu.IdentityInterface(fields=["seeds", "in_file"]),
name="inputspec")
n.iterables = [(q, parameters[q].tolist()) for q in [
"multiplier", "nbhd", "iterations", "timestep", "smoothingiterations"
]]
n.synchronize = True
wf.connect(inputspec, "seeds", n, "seeds")
wf.connect(inputspec, "in_file", n, "inputv")
dt = pe.Node(fsl.ChangeDataType(output_datatype="short"), name="changedt")
wf.connect(n, "outfile", dt, "in_file")
stats = pe.Node(fsl.ImageStats(op_string="-c -w"), name="stats")
wf.connect(dt, "out_file", stats, "in_file")
avg = pe.JoinNode(ants.AverageImages(dimension=3, normalize=False),
name="average",
joinsource="srgs",
joinfield=["images"])
wf.connect(dt, "out_file", avg, "images")
st = pe.JoinNode(niu.Function(input_names=["out_stats", "parameters"],
output_names=["outfile"],
function=combine_stats),
name="combiner",
joinsource="srgs",
joinfield=["out_stats"])
#wf.connect(dt, "out_file", st, "out_files")
wf.connect(stats, "out_stat", st, "out_stats")
st.inputs.parameters = parameters
outputspec = pe.Node(niu.IdentityInterface(fields=["avg_image", "stats"]),
name="outputspec")
wf.connect(avg, "output_average_image", outputspec, "avg_image")
wf.connect(st, "outfile", outputspec, "stats")
return wf, inputspec, outputspec
def init_zscore_wf(name="zscore_wf", memcalc=MemoryCalculator()):
"""
Within-volume z score
Used for ReHo and ALFF
"""
workflow = pe.Workflow(name=name)
inputnode = pe.Node(
interface=niu.IdentityInterface(fields=["in_file", "mask_file"]),
name="inputnode",
)
stats = pe.Node(
interface=fsl.ImageStats(),
name="stats",
)
stats.inputs.op_string = "-k %s -m -s"
def get_zscore_op_string(list):
"""
creates op_string for fslmaths
:param list
:return: op_string for fslmaths
"""
return "-sub {:f} -div {:f}".format(*list)
zscore = pe.Node(
interface=fsl.ImageMaths(),
name="zscore",
)
outputnode = pe.Node(interface=niu.IdentityInterface(fields=["out_file"]),
name="outputnode")
workflow.connect([
(inputnode, stats, [("in_file", "in_file"),
("mask_file", "mask_file")]),
(inputnode, zscore, [("in_file", "in_file"),
("mask_file", "mask_file")]),
(stats, zscore, [(("out_stat", get_zscore_op_string), "op_string")]),
(zscore, outputnode, [("out_file", "out_file")]),
])
return workflow
def compcorr(name='compcorr'):
from nipype.workflows.rsfmri.fsl.resting import extract_noise_components
from nipype.algorithms.misc import TSNR
wkfl = pe.Workflow(name=name)
inputnode = pe.Node(utility.IdentityInterface(
fields=['in_file', 'mask', 'num_components']),
name='inputspec')
outputnode = pe.Node(utility.IdentityInterface(fields=['corrected_file']),
name='outputspec')
tsnr = pe.Node(TSNR(), name='tsnr')
getthresh = pe.Node(interface=fsl.ImageStats(op_string='-k %s -p 98'),
name='getthreshold')
threshold_stddev = pe.Node(fsl.Threshold(), name='threshold')
compcor = pe.Node(
utility.Function(input_names=[
'realigned_file', 'noise_mask_file', 'num_components'
],
output_names=['noise_components'],
function=extract_noise_components),
name='compcorr',
)
remove_noise = pe.Node(
fsl.FilterRegressor(filter_all=True),
name='remove_noise',
)
wkfl.connect([
(inputnode, tsnr, [('in_file', 'in_file')]),
(inputnode, compcor, [('in_file', 'realigned_file'),
('num_components', 'num_components')]),
(tsnr, threshold_stddev, [('stddev_file', 'in_file')]),
(tsnr, getthresh, [('stddev_file', 'in_file')]),
(inputnode, getthresh, [('mask', 'mask_file')]),
(inputnode, remove_noise, [('in_file', 'in_file')]),
(getthresh, threshold_stddev, [('out_stat', 'thresh')]),
(threshold_stddev, compcor, [('out_file', 'noise_mask_file')]),
(compcor, remove_noise, [('noise_components', 'design_file')]),
(inputnode, remove_noise, [('mask', 'mask')]),
(remove_noise, outputnode, [('out_file', 'corrected_file')]),
])
return wkfl
def t_compcor(wf_name="t_compcor"):
cc = pe.Workflow(name=wf_name)
# Define nodes
inputnode = pe.Node(interface=util.IdentityInterface(
fields=['func', 'num_noise_components']),
name='inputspec')
outputnode = pe.Node(interface=util.IdentityInterface(
fields=['noise_mask_file', 'noise_components', 'residual_file']),
name='outputspec')
tsnr = pe.MapNode(TSNR(regress_poly=2), name='tsnr', iterfield=['in_file'])
getthresh = pe.MapNode(interface=fsl.ImageStats(op_string='-p 98'),
name='getthreshold',
iterfield=['in_file'])
threshold_stddev = pe.MapNode(fsl.Threshold(),
name='threshold',
iterfield=['in_file', 'thresh'])
compcor = pe.MapNode(util.Function(
input_names=['realigned_file', 'noise_mask_file', 'num_components'],
output_names=['noise_components'],
function=extract_noise_components),
name='compcorr',
iterfield=['realigned_file', 'noise_mask_file'])
remove_noise = pe.MapNode(fsl.FilterRegressor(filter_all=True),
name='remove_noise',
iterfield=['in_file', 'design_file'])
cc.connect(inputnode, 'func', tsnr, 'in_file')
cc.connect(tsnr, 'stddev_file', threshold_stddev, 'in_file')
cc.connect(tsnr, 'stddev_file', getthresh, 'in_file')
cc.connect(getthresh, 'out_stat', threshold_stddev, 'thresh')
cc.connect(inputnode, 'func', compcor, 'realigned_file')
cc.connect(threshold_stddev, 'out_file', compcor, 'noise_mask_file')
cc.connect(inputnode, 'num_noise_components', compcor, 'num_components')
cc.connect(tsnr, 'detrended_file', remove_noise, 'in_file')
cc.connect(compcor, 'noise_components', remove_noise, 'design_file')
cc.connect(compcor, 'noise_components', outputnode, 'noise_components')
cc.connect(remove_noise, 'out_file', outputnode, 'residual_file')
cc.connect(threshold_stddev, 'out_file', outputnode, 'noise_mask_file')
return cc
def calc_iqms(self):
# tSNR
tsnr = TSNR()
tsnr.inputs.in_file = self.source_img
tsnr.inputs.mean_file = os.path.join(self.outputdir, self.task,
self.task + "_mean_tsnr.nii.gz")
tsnr_res = tsnr.run()
mean_tsnr_img = tsnr_res.outputs.mean_file
stat = fsl.ImageStats(in_file=mean_tsnr_img, op_string=' -M')
stat_run = stat.run()
mean_tsnr = round(stat_run.outputs.out_stat, 2)
# framewise-displacement
if type(
self.confounds
) == str: # ensure self.confounds doesn't refer to empty string
mean_fd = 'n/a'
else:
column_means = self.confounds.mean(axis=0, skipna=True)
mean_fd = round(column_means['framewise_displacement'], 2)
return mean_tsnr, mean_fd
func_2_template.inputs.float = True
# ========================================================================================================
# In[15]:
# Use nilearn AFNI (thanks Bob Cox), because, as you know, fsl does not support anisotropic smoothing
# 2D smoothing
smoothing_2d = Node(afni.Merge(), name='smoothing_2d')
smoothing_2d.inputs.out_file = 'afni_2d_smoothed.nii.gz'
smoothing_2d.inputs.doall = True
smoothing_2d.inputs.blurfwhm_bx_by_bz = [4, 4, 0]
# ========================================================================================================
# In[16]:
# Getting median intensity
Median_Intensity = Node(fsl.ImageStats(), name='Median_Intensity')
# Put -k before -p 50
Median_Intensity.inputs.op_string = '-k %s -p 50'
# Scale median intensity
def Scale_Median_Intensity(median_intensity):
scaling = 10000 / median_intensity
return scaling
Scale_Median_Intensity = Node(name='Scale_Median_Intensity',
interface=Function(
input_names=['median_intensity'],
output_names=['scaling'],
preproc.connect(meanfunc, 'out_file', meanfuncmask, 'in_file')
"""
Mask the functional runs with the extracted mask
"""
maskfunc = pe.MapNode(interface=fsl.ImageMaths(suffix='_bet',
op_string='-mas'),
iterfield=['in_file'],
name='maskfunc')
preproc.connect(motion_correct, 'out_file', maskfunc, 'in_file')
preproc.connect(meanfuncmask, 'mask_file', maskfunc, 'in_file2')
"""
Determine the 2nd and 98th percentile intensities of each functional run
"""
getthresh = pe.MapNode(interface=fsl.ImageStats(op_string='-p 2 -p 98'),
iterfield=['in_file'],
name='getthreshold')
preproc.connect(maskfunc, 'out_file', getthresh, 'in_file')
"""
Threshold the first run of the functional data at 10% of the 98th percentile
"""
threshold = pe.Node(interface=fsl.ImageMaths(out_data_type='char',
suffix='_thresh'),
name='threshold')
preproc.connect(maskfunc, ('out_file', pickfirst), threshold, 'in_file')
"""
Define a function to get 10% of the intensity
"""
def create_susan_smooth(name="susan_smooth", separate_masks=True):
"""Create a SUSAN smoothing workflow
Parameters
----------
::
name : name of workflow (default: susan_smooth)
separate_masks : separate masks for each run
Inputs::
inputnode.in_files : functional runs (filename or list of filenames)
inputnode.fwhm : fwhm for smoothing with SUSAN
inputnode.mask_file : mask used for estimating SUSAN thresholds (but not for smoothing)
Outputs::
outputnode.smoothed_files : functional runs (filename or list of filenames)
Example
-------
>>> smooth = create_susan_smooth()
>>> smooth.inputs.inputnode.in_files = 'f3.nii'
>>> smooth.inputs.inputnode.fwhm = 5
>>> smooth.inputs.inputnode.mask_file = 'mask.nii'
>>> smooth.run() # doctest: +SKIP
"""
susan_smooth = pe.Workflow(name=name)
"""
Set up a node to define all inputs required for the preprocessing workflow
"""
inputnode = pe.Node(interface=util.IdentityInterface(fields=['in_files',
'fwhm',
'mask_file']),
name='inputnode')
"""
Smooth each run using SUSAN with the brightness threshold set to 75%
of the median value for each run and a mask consituting the mean
functional
"""
smooth = pe.MapNode(interface=fsl.SUSAN(),
iterfield=['in_file', 'brightness_threshold','usans'],
name='smooth')
"""
Determine the median value of the functional runs using the mask
"""
if separate_masks:
median = pe.MapNode(interface=fsl.ImageStats(op_string='-k %s -p 50'),
iterfield = ['in_file', 'mask_file'],
name='median')
else:
median = pe.MapNode(interface=fsl.ImageStats(op_string='-k %s -p 50'),
iterfield = ['in_file'],
name='median')
susan_smooth.connect(inputnode, 'in_files', median, 'in_file')
susan_smooth.connect(inputnode, 'mask_file', median, 'mask_file')
"""
Mask the motion corrected functional runs with the dilated mask
"""
if separate_masks:
mask = pe.MapNode(interface=fsl.ImageMaths(suffix='_mask',
op_string='-mas'),
iterfield=['in_file', 'in_file2'],
name='mask')
else:
mask = pe.MapNode(interface=fsl.ImageMaths(suffix='_mask',
op_string='-mas'),
iterfield=['in_file'],
name='mask')
susan_smooth.connect(inputnode, 'in_files', mask, 'in_file')
susan_smooth.connect(inputnode, 'mask_file', mask, 'in_file2')
"""
Determine the mean image from each functional run
"""
meanfunc = pe.MapNode(interface=fsl.ImageMaths(op_string='-Tmean',
suffix='_mean'),
iterfield=['in_file'],
name='meanfunc2')
susan_smooth.connect(mask, 'out_file', meanfunc, 'in_file')
"""
Merge the median values with the mean functional images into a coupled list
"""
merge = pe.Node(interface=util.Merge(2, axis='hstack'),
name='merge')
susan_smooth.connect(meanfunc,'out_file', merge, 'in1')
susan_smooth.connect(median,'out_stat', merge, 'in2')
"""
Define a function to get the brightness threshold for SUSAN
"""
susan_smooth.connect(inputnode, 'fwhm', smooth, 'fwhm')
susan_smooth.connect(inputnode, 'in_files', smooth, 'in_file')
susan_smooth.connect(median, ('out_stat', getbtthresh), smooth, 'brightness_threshold')
susan_smooth.connect(merge, ('out', getusans), smooth, 'usans')
outputnode = pe.Node(interface=util.IdentityInterface(fields=['smoothed_files']),
name='outputnode')
susan_smooth.connect(smooth, 'smoothed_file', outputnode, 'smoothed_files')
return susan_smooth
def create_fsl_fs_preproc(name='preproc', highpass=True, whichvol='middle'):
"""Create a FEAT preprocessing workflow together with freesurfer
Parameters
----------
::
name : name of workflow (default: preproc)
highpass : boolean (default: True)
whichvol : which volume of the first run to register to ('first', 'middle', 'mean')
Inputs::
inputspec.func : functional runs (filename or list of filenames)
inputspec.fwhm : fwhm for smoothing with SUSAN
inputspec.highpass : HWHM in TRs (if created with highpass=True)
inputspec.subject_id : freesurfer subject id
inputspec.subjects_dir : freesurfer subjects dir
Outputs::
outputspec.reference : volume to which runs are realigned
outputspec.motion_parameters : motion correction parameters
outputspec.realigned_files : motion corrected files
outputspec.motion_plots : plots of motion correction parameters
outputspec.mask_file : mask file used to mask the brain
outputspec.smoothed_files : smoothed functional data
outputspec.highpassed_files : highpassed functional data (if highpass=True)
outputspec.reg_file : bbregister registration files
outputspec.reg_cost : bbregister registration cost files
Example
-------
>>> preproc = create_fsl_fs_preproc(whichvol='first')
>>> preproc.inputs.inputspec.highpass = 128./(2*2.5)
>>> preproc.inputs.inputspec.func = ['f3.nii', 'f5.nii']
>>> preproc.inputs.inputspec.subjects_dir = '.'
>>> preproc.inputs.inputspec.subject_id = 's1'
>>> preproc.inputs.inputspec.fwhm = 6
>>> preproc.run() # doctest: +SKIP
"""
featpreproc = pe.Workflow(name=name)
"""
Set up a node to define all inputs required for the preprocessing workflow
"""
if highpass:
inputnode = pe.Node(interface=util.IdentityInterface(fields=['func',
'fwhm',
'subject_id',
'subjects_dir',
'highpass']),
name='inputspec')
outputnode = pe.Node(interface=util.IdentityInterface(fields=['reference',
'motion_parameters',
'realigned_files',
'motion_plots',
'mask_file',
'smoothed_files',
'highpassed_files',
'reg_file',
'reg_cost'
]),
name='outputspec')
else:
inputnode = pe.Node(interface=util.IdentityInterface(fields=['func',
'fwhm',
'subject_id',
'subjects_dir'
]),
name='inputspec')
outputnode = pe.Node(interface=util.IdentityInterface(fields=['reference',
'motion_parameters',
'realigned_files',
'motion_plots',
'mask_file',
'smoothed_files',
'reg_file',
'reg_cost'
]),
name='outputspec')
"""
Set up a node to define outputs for the preprocessing workflow
"""
"""
Convert functional images to float representation. Since there can
be more than one functional run we use a MapNode to convert each
run.
"""
img2float = pe.MapNode(interface=fsl.ImageMaths(out_data_type='float',
op_string = '',
suffix='_dtype'),
iterfield=['in_file'],
name='img2float')
featpreproc.connect(inputnode, 'func', img2float, 'in_file')
"""
Extract the first volume of the first run as the reference
"""
if whichvol != 'mean':
extract_ref = pe.Node(interface=fsl.ExtractROI(t_size=1),
iterfield=['in_file'],
name = 'extractref')
featpreproc.connect(img2float, ('out_file', pickfirst), extract_ref, 'in_file')
featpreproc.connect(img2float, ('out_file', pickvol, 0, whichvol), extract_ref, 't_min')
featpreproc.connect(extract_ref, 'roi_file', outputnode, 'reference')
"""
Realign the functional runs to the reference (1st volume of first run)
"""
motion_correct = pe.MapNode(interface=fsl.MCFLIRT(save_mats = True,
save_plots = True,
interpolation = 'sinc'),
name='realign',
iterfield = ['in_file'])
featpreproc.connect(img2float, 'out_file', motion_correct, 'in_file')
if whichvol != 'mean':
featpreproc.connect(extract_ref, 'roi_file', motion_correct, 'ref_file')
else:
motion_correct.inputs.mean_vol = True
featpreproc.connect(motion_correct, 'mean_img', outputnode, 'reference')
featpreproc.connect(motion_correct, 'par_file', outputnode, 'motion_parameters')
featpreproc.connect(motion_correct, 'out_file', outputnode, 'realigned_files')
"""
Plot the estimated motion parameters
"""
plot_motion = pe.MapNode(interface=fsl.PlotMotionParams(in_source='fsl'),
name='plot_motion',
iterfield=['in_file'])
plot_motion.iterables = ('plot_type', ['rotations', 'translations'])
featpreproc.connect(motion_correct, 'par_file', plot_motion, 'in_file')
featpreproc.connect(plot_motion, 'out_file', outputnode, 'motion_plots')
"""Get the mask from subject for each run
"""
maskflow = create_getmask_flow()
featpreproc.connect([(inputnode, maskflow, [('subject_id','inputspec.subject_id'),
('subjects_dir', 'inputspec.subjects_dir')])])
maskflow.inputs.inputspec.contrast_type = 't2'
if whichvol != 'mean':
featpreproc.connect(extract_ref, 'roi_file', maskflow, 'inputspec.source_file')
else:
featpreproc.connect(motion_correct, ('mean_img', pickfirst), maskflow, 'inputspec.source_file')
"""
Mask the functional runs with the extracted mask
"""
maskfunc = pe.MapNode(interface=fsl.ImageMaths(suffix='_bet',
op_string='-mas'),
iterfield=['in_file'],
name = 'maskfunc')
featpreproc.connect(motion_correct, 'out_file', maskfunc, 'in_file')
featpreproc.connect(maskflow, ('outputspec.mask_file', pickfirst), maskfunc, 'in_file2')
"""
Smooth each run using SUSAN with the brightness threshold set to 75%
of the median value for each run and a mask consituting the mean
functional
"""
smooth = create_susan_smooth(separate_masks=False)
featpreproc.connect(inputnode, 'fwhm', smooth, 'inputnode.fwhm')
featpreproc.connect(maskfunc, 'out_file', smooth, 'inputnode.in_files')
featpreproc.connect(maskflow, ('outputspec.mask_file', pickfirst), smooth, 'inputnode.mask_file')
"""
Mask the smoothed data with the dilated mask
"""
maskfunc3 = pe.MapNode(interface=fsl.ImageMaths(suffix='_mask',
op_string='-mas'),
iterfield=['in_file'],
name='maskfunc3')
featpreproc.connect(smooth, 'outputnode.smoothed_files', maskfunc3, 'in_file')
featpreproc.connect(maskflow, ('outputspec.mask_file', pickfirst), maskfunc3, 'in_file2')
concatnode = pe.Node(interface=util.Merge(2),
name='concat')
featpreproc.connect(maskfunc, ('out_file', tolist), concatnode, 'in1')
featpreproc.connect(maskfunc3, ('out_file', tolist), concatnode, 'in2')
"""
The following nodes select smooth or unsmoothed data depending on the
fwhm. This is because SUSAN defaults to smoothing the data with about the
voxel size of the input data if the fwhm parameter is less than 1/3 of the
voxel size.
"""
selectnode = pe.Node(interface=util.Select(),name='select')
featpreproc.connect(concatnode, 'out', selectnode, 'inlist')
featpreproc.connect(inputnode, ('fwhm', chooseindex), selectnode, 'index')
featpreproc.connect(selectnode, 'out', outputnode, 'smoothed_files')
"""
Scale the median value of the run is set to 10000
"""
meanscale = pe.MapNode(interface=fsl.ImageMaths(suffix='_gms'),
iterfield=['in_file','op_string'],
name='meanscale')
featpreproc.connect(selectnode, 'out', meanscale, 'in_file')
"""
Determine the median value of the functional runs using the mask
"""
medianval = pe.MapNode(interface=fsl.ImageStats(op_string='-k %s -p 50'),
iterfield = ['in_file'],
name='medianval')
featpreproc.connect(motion_correct, 'out_file', medianval, 'in_file')
featpreproc.connect(maskflow, ('outputspec.mask_file', pickfirst), medianval, 'mask_file')
"""
Define a function to get the scaling factor for intensity normalization
"""
featpreproc.connect(medianval, ('out_stat', getmeanscale), meanscale, 'op_string')
"""
Perform temporal highpass filtering on the data
"""
if highpass:
highpass = pe.MapNode(interface=fsl.ImageMaths(suffix='_tempfilt'),
iterfield=['in_file'],
name='highpass')
featpreproc.connect(inputnode, ('highpass', highpass_operand), highpass, 'op_string')
featpreproc.connect(meanscale, 'out_file', highpass, 'in_file')
featpreproc.connect(highpass, 'out_file', outputnode, 'highpassed_files')
featpreproc.connect(maskflow, ('outputspec.mask_file', pickfirst), outputnode, 'mask_file')
featpreproc.connect(maskflow, 'outputspec.reg_file', outputnode, 'reg_file')
featpreproc.connect(maskflow, 'outputspec.reg_cost', outputnode, 'reg_cost')
return featpreproc
def legacy(
bids_base,
template,
debug=False,
functional_blur_xy=False,
functional_match={},
keep_work=False,
n_jobs=False,
n_jobs_percentage=0.8,
out_base=None,
realign="time",
registration_mask=False,
sessions=[],
structural_match={},
subjects=[],
tr=1,
workflow_name='legacy',
enforce_dummy_scans=DUMMY_SCANS,
exclude={},
):
'''
Legacy realignment and registration workflow representative of the tweaks and workarounds commonly used in the pre-SAMRI period.
Parameters
----------
bids_base : str
Path to the BIDS data set root.
template : str
Path to the template to register the data to.
debug : bool, optional
Whether to enable nipype debug mode.
This increases logging.
exclude : dict
A dictionary with any combination of "sessions", "subjects", "tasks" as keys and corresponding identifiers as values.
If this is specified matching entries will be excluded in the analysis.
functional_blur_xy : float, optional
Factor by which to smooth data in the xy-plane; if parameter evaluates to false, no smoothing will be applied.
Ideally this value should correspond to the resolution or smoothness in the z-direction (assuing z represents the lower-resolution slice-encoding direction).
functional_match : dict, optional
Dictionary specifying a whitelist to use for functional data inclusion into the workflow; if dictionary is empty no whitelist is present and all data will be considered.
The dictionary should have keys which are 'acquisition', 'task', or 'modality', and values which are lists of acceptable strings for the respective BIDS field.
keep_work : bool, str
Whether to keep the work directory after workflow conclusion (this directory contains all the intermediary processing commands, inputs, and outputs --- it is invaluable for debugging but many times larger in size than the actual output).
n_jobs : int, optional
Number of processors to maximally use for the workflow; if unspecified a best guess will be estimate based on `n_jobs_percentage` and hardware (but not on current load).
n_jobs_percentage : float, optional
Percentage of available processors (as in available hardware, not available free load) to maximally use for the workflow (this is overriden by `n_jobs`).
out_base : str, optional
Output base directory - inside which a directory named `workflow_name` (as well as associated directories) will be created.
realign : {"space","time","spacetime",""}, optional
Parameter that dictates slictiming correction and realignment of slices. "time" (FSL.SliceTimer) is default, since it works safely. Use others only with caution!
registration_mask : str, optional
Mask to use for the registration process.
This mask will constrain the area for similarity metric evaluation, but the data will not be cropped.
sessions : list, optional
A whitelist of sessions to include in the workflow, if the list is empty there is no whitelist and all sessions will be considered.
structural_match : dict, optional
Dictionary specifying a whitelist to use for structural data inclusion into the workflow; if dictionary is empty no whitelist is present and all data will be considered.
The dictionary should have keys which are 'acquisition', or 'modality', and values which are lists of acceptable strings for the respective BIDS field.
subjects : list, optional
A whitelist of subjects to include in the workflow, if the list is empty there is no whitelist and all sessions will be considered.
tr : float, optional
Repetition time, explicitly.
WARNING! This is a parameter waiting for deprecation.
workflow_name : str, optional
Top level name for the output directory.
'''
try:
import nipype.interfaces.ants.legacy as antslegacy
except ModuleNotFoundError:
print('''
The `nipype.interfaces.ants.legacy` was not found on this system.
You may want to downgrade nipype to e.g. 1.1.1, as this module has been removed in more recent versions:
https://github.com/nipy/nipype/issues/3197
''')
bids_base, out_base, out_dir, template, registration_mask, data_selection, functional_scan_types, structural_scan_types, subjects_sessions, func_ind, struct_ind = common_select(
bids_base,
out_base,
workflow_name,
template,
registration_mask,
functional_match,
structural_match,
subjects,
sessions,
exclude,
)
if not n_jobs:
n_jobs = max(int(round(mp.cpu_count() * n_jobs_percentage)), 2)
get_f_scan = pe.Node(name='get_f_scan',
interface=util.Function(
function=get_bids_scan,
input_names=inspect.getargspec(get_bids_scan)[0],
output_names=[
'scan_path', 'scan_type', 'task', 'nii_path',
'nii_name', 'events_name', 'subject_session',
'metadata_filename', 'dict_slice', 'ind_type'
]))
get_f_scan.inputs.ignore_exception = True
get_f_scan.inputs.data_selection = data_selection
get_f_scan.inputs.bids_base = bids_base
get_f_scan.iterables = ("ind_type", func_ind)
dummy_scans = pe.Node(
name='dummy_scans',
interface=util.Function(
function=force_dummy_scans,
input_names=inspect.getargspec(force_dummy_scans)[0],
output_names=['out_file', 'deleted_scans']))
dummy_scans.inputs.desired_dummy_scans = enforce_dummy_scans
events_file = pe.Node(
name='events_file',
interface=util.Function(
function=write_bids_events_file,
input_names=inspect.getargspec(write_bids_events_file)[0],
output_names=['out_file']))
temporal_mean = pe.Node(interface=fsl.MeanImage(), name="temporal_mean")
f_resize = pe.Node(interface=VoxelResize(), name="f_resize")
f_resize.inputs.resize_factors = [10, 10, 10]
f_percentile = pe.Node(interface=fsl.ImageStats(), name="f_percentile")
f_percentile.inputs.op_string = '-p 98'
f_threshold = pe.Node(interface=fsl.Threshold(), name="f_threshold")
f_fast = pe.Node(interface=fsl.FAST(), name="f_fast")
f_fast.inputs.no_pve = True
f_fast.inputs.output_biascorrected = True
f_bet = pe.Node(interface=fsl.BET(), name="f_BET")
f_swapdim = pe.Node(interface=fsl.SwapDimensions(), name="f_swapdim")
f_swapdim.inputs.new_dims = ('x', '-z', '-y')
f_deleteorient = pe.Node(interface=FSLOrient(), name="f_deleteorient")
f_deleteorient.inputs.main_option = 'deleteorient'
datasink = pe.Node(nio.DataSink(), name='datasink')
datasink.inputs.base_directory = out_dir
datasink.inputs.parameterization = False
workflow_connections = [
(get_f_scan, dummy_scans, [('nii_path', 'in_file')]),
(dummy_scans, events_file, [('deleted_scans', 'forced_dummy_scans')]),
(dummy_scans, f_resize, [('out_file', 'in_file')]),
(get_f_scan, events_file, [('nii_path', 'timecourse_file'),
('task', 'task'),
('scan_path', 'scan_dir')]),
(events_file, datasink, [('out_file', 'func.@events')]),
(get_f_scan, events_file, [('events_name', 'out_file')]),
(get_f_scan, datasink, [(('subject_session', ss_to_path), 'container')
]),
(temporal_mean, f_percentile, [('out_file', 'in_file')]),
# here we divide by 10 assuming 10 percent noise
(f_percentile, f_threshold, [(('out_stat', divideby_10), 'thresh')]),
(temporal_mean, f_threshold, [('out_file', 'in_file')]),
(f_threshold, f_fast, [('out_file', 'in_files')]),
(f_fast, f_bet, [('restored_image', 'in_file')]),
(f_resize, f_deleteorient, [('out_file', 'in_file')]),
(f_deleteorient, f_swapdim, [('out_file', 'in_file')]),
]
if realign == "space":
realigner = pe.Node(interface=spm.Realign(), name="realigner")
realigner.inputs.register_to_mean = True
workflow_connections.extend([
(f_swapdim, realigner, [('out_file', 'in_file')]),
])
elif realign == "spacetime":
realigner = pe.Node(interface=nipy.SpaceTimeRealigner(),
name="realigner")
realigner.inputs.slice_times = "asc_alt_2"
realigner.inputs.tr = tr
realigner.inputs.slice_info = 3 #3 for coronal slices (2 for horizontal, 1 for sagittal)
workflow_connections.extend([
(f_swapdim, realigner, [('out_file', 'in_file')]),
])
elif realign == "time":
realigner = pe.Node(interface=fsl.SliceTimer(), name="slicetimer")
realigner.inputs.time_repetition = tr
workflow_connections.extend([
(f_swapdim, realigner, [('out_file', 'in_file')]),
])
f_antsintroduction = pe.Node(interface=antslegacy.antsIntroduction(),
name='ants_introduction')
f_antsintroduction.inputs.dimension = 3
f_antsintroduction.inputs.reference_image = template
#will need updating to `1`
f_antsintroduction.inputs.bias_field_correction = True
f_antsintroduction.inputs.transformation_model = 'GR'
f_antsintroduction.inputs.max_iterations = [8, 15, 8]
f_warp = pe.Node(interface=ants.WarpTimeSeriesImageMultiTransform(),
name='f_warp')
f_warp.inputs.reference_image = template
f_warp.inputs.dimension = 4
f_copysform2qform = pe.Node(interface=FSLOrient(),
name='f_copysform2qform')
f_copysform2qform.inputs.main_option = 'copysform2qform'
warp_merge = pe.Node(util.Merge(2), name='warp_merge')
workflow_connections.extend([
(f_bet, f_antsintroduction, [('out_file', 'input_image')]),
(f_antsintroduction, warp_merge, [('warp_field', 'in1')]),
(f_antsintroduction, warp_merge, [('affine_transformation', 'in2')]),
(warp_merge, f_warp, [('out', 'transformation_series')]),
(f_warp, f_copysform2qform, [('output_image', 'in_file')]),
])
if realign == "space":
workflow_connections.extend([
(realigner, temporal_mean, [('realigned_files', 'in_file')]),
(realigner, f_warp, [('realigned_files', 'input_image')]),
])
elif realign == "spacetime":
workflow_connections.extend([
(realigner, temporal_mean, [('out_file', 'in_file')]),
(realigner, f_warp, [('out_file', 'input_image')]),
])
elif realign == "time":
workflow_connections.extend([
(realigner, temporal_mean, [('slice_time_corrected_file',
'in_file')]),
(realigner, f_warp, [('slice_time_corrected_file', 'input_image')
]),
])
else:
workflow_connections.extend([
(f_resize, temporal_mean, [('out_file', 'in_file')]),
(f_swapdim, f_warp, [('out_file', 'input_image')]),
])
if functional_blur_xy:
blur = pe.Node(interface=afni.preprocess.BlurToFWHM(), name="blur")
blur.inputs.fwhmxy = functional_blur_xy
workflow_connections.extend([
(get_f_scan, blur, [('nii_name', 'out_file')]),
(f_copysform2qform, blur, [('out_file', 'in_file')]),
(blur, datasink, [('out_file', 'func')]),
])
else:
f_rename = pe.Node(util.Rename(), name='f_rename')
workflow_connections.extend([
(get_f_scan, f_rename, [('nii_name', 'format_string')]),
(f_copysform2qform, f_rename, [('out_file', 'in_file')]),
(f_rename, datasink, [('out_file', 'func')]),
])
workflow_config = {
'execution': {
'crashdump_dir': path.join(out_base, 'crashdump'),
}
}
if debug:
workflow_config['logging'] = {
'workflow_level': 'DEBUG',
'utils_level': 'DEBUG',
'interface_level': 'DEBUG',
'filemanip_level': 'DEBUG',
'log_to_file': 'true',
}
workdir_name = workflow_name + "_work"
#this gives the name of the workdir, the output name is passed to the datasink
workflow = pe.Workflow(name=workdir_name)
workflow.connect(workflow_connections)
workflow.base_dir = out_base
workflow.config = workflow_config
try:
workflow.write_graph(dotfilename=path.join(workflow.base_dir,
workdir_name, "graph.dot"),
graph2use="hierarchical",
format="png")
except OSError:
print(
'We could not write the DOT file for visualization (`dot` function from the graphviz package). This is non-critical to the processing, but you should get this fixed.'
)
workflow.run(plugin="MultiProc", plugin_args={'n_procs': n_jobs})
copy_bids_files(bids_base, os.path.join(out_base, workflow_name))
if not keep_work:
workdir = path.join(workflow.base_dir, workdir_name)
try:
shutil.rmtree(workdir)
except OSError as e:
if str(e) == 'Cannot call rmtree on a symbolic link':
print(
'Not deleting top level workdir (`{}`), as it is a symlink. Deleting only contents instead'
.format(workdir))
for file_object in os.listdir(workdir):
file_object_path = os.path.join(workdir, file_object)
if os.path.isfile(file_object_path):
os.unlink(file_object_path)
else:
shutil.rmtree(file_object_path)
else:
raise OSError(str(e))
def create_parallelfeat_preproc(name='featpreproc', highpass=True):
"""Preprocess each run with FSL independently of the others
Parameters
----------
::
name : name of workflow (default: featpreproc)
highpass : boolean (default: True)
Inputs::
inputspec.func : functional runs (filename or list of filenames)
inputspec.fwhm : fwhm for smoothing with SUSAN
inputspec.highpass : HWHM in TRs (if created with highpass=True)
Outputs::
outputspec.reference : volume to which runs are realigned
outputspec.motion_parameters : motion correction parameters
outputspec.realigned_files : motion corrected files
outputspec.motion_plots : plots of motion correction parameters
outputspec.mask : mask file used to mask the brain
outputspec.smoothed_files : smoothed functional data
outputspec.highpassed_files : highpassed functional data (if highpass=True)
outputspec.mean : mean file
Example
-------
>>> preproc = create_parallelfeat_preproc()
>>> preproc.inputs.inputspec.func = ['f3.nii', 'f5.nii']
>>> preproc.inputs.inputspec.fwhm = 5
>>> preproc.inputs.inputspec.highpass = 128./(2*2.5)
>>> preproc.base_dir = '/tmp'
>>> preproc.run() # doctest: +SKIP
>>> preproc = create_parallelfeat_preproc(highpass=False)
>>> preproc.inputs.inputspec.func = 'f3.nii'
>>> preproc.inputs.inputspec.fwhm = 5
>>> preproc.base_dir = '/tmp'
>>> preproc.run() # doctest: +SKIP
"""
featpreproc = pe.Workflow(name=name)
"""
Set up a node to define all inputs required for the preprocessing workflow
"""
if highpass:
inputnode = pe.Node(interface=util.IdentityInterface(fields=['func',
'fwhm',
'highpass']),
name='inputspec')
outputnode = pe.Node(interface=util.IdentityInterface(fields=['reference',
'motion_parameters',
'realigned_files',
'motion_plots',
'mask',
'smoothed_files',
'highpassed_files',
'mean']),
name='outputspec')
else:
inputnode = pe.Node(interface=util.IdentityInterface(fields=['func',
'fwhm']),
name='inputspec')
outputnode = pe.Node(interface=util.IdentityInterface(fields=['reference',
'motion_parameters',
'realigned_files',
'motion_plots',
'mask',
'smoothed_files',
'mean']),
name='outputspec')
"""
Set up a node to define outputs for the preprocessing workflow
"""
"""
Convert functional images to float representation. Since there can
be more than one functional run we use a MapNode to convert each
run.
"""
img2float = pe.MapNode(interface=fsl.ImageMaths(out_data_type='float',
op_string = '',
suffix='_dtype'),
iterfield=['in_file'],
name='img2float')
featpreproc.connect(inputnode, 'func', img2float, 'in_file')
"""
Extract the first volume of the first run as the reference
"""
extract_ref = pe.MapNode(interface=fsl.ExtractROI(t_size=1),
iterfield=['in_file', 't_min'],
name = 'extractref')
featpreproc.connect(img2float, 'out_file', extract_ref, 'in_file')
featpreproc.connect(img2float, ('out_file', pickmiddle), extract_ref, 't_min')
featpreproc.connect(extract_ref, 'roi_file', outputnode, 'reference')
"""
Realign the functional runs to the reference (1st volume of first run)
"""
motion_correct = pe.MapNode(interface=fsl.MCFLIRT(save_mats = True,
save_plots = True),
name='realign',
iterfield = ['in_file', 'ref_file'])
featpreproc.connect(img2float, 'out_file', motion_correct, 'in_file')
featpreproc.connect(extract_ref, 'roi_file', motion_correct, 'ref_file')
featpreproc.connect(motion_correct, 'par_file', outputnode, 'motion_parameters')
featpreproc.connect(motion_correct, 'out_file', outputnode, 'realigned_files')
"""
Plot the estimated motion parameters
"""
plot_motion = pe.MapNode(interface=fsl.PlotMotionParams(in_source='fsl'),
name='plot_motion',
iterfield=['in_file'])
plot_motion.iterables = ('plot_type', ['rotations', 'translations'])
featpreproc.connect(motion_correct, 'par_file', plot_motion, 'in_file')
featpreproc.connect(plot_motion, 'out_file', outputnode, 'motion_plots')
"""
Extract the mean volume of the first functional run
"""
meanfunc = pe.MapNode(interface=fsl.ImageMaths(op_string = '-Tmean',
suffix='_mean'),
iterfield=['in_file'],
name='meanfunc')
featpreproc.connect(motion_correct, 'out_file', meanfunc, 'in_file')
"""
Strip the skull from the mean functional to generate a mask
"""
meanfuncmask = pe.MapNode(interface=fsl.BET(mask = True,
no_output=True,
frac = 0.3),
iterfield=['in_file'],
name = 'meanfuncmask')
featpreproc.connect(meanfunc, 'out_file', meanfuncmask, 'in_file')
"""
Mask the functional runs with the extracted mask
"""
maskfunc = pe.MapNode(interface=fsl.ImageMaths(suffix='_bet',
op_string='-mas'),
iterfield=['in_file', 'in_file2'],
name = 'maskfunc')
featpreproc.connect(motion_correct, 'out_file', maskfunc, 'in_file')
featpreproc.connect(meanfuncmask, 'mask_file', maskfunc, 'in_file2')
"""
Determine the 2nd and 98th percentile intensities of each functional run
"""
getthresh = pe.MapNode(interface=fsl.ImageStats(op_string='-p 2 -p 98'),
iterfield = ['in_file'],
name='getthreshold')
featpreproc.connect(maskfunc, 'out_file', getthresh, 'in_file')
"""
Threshold the first run of the functional data at 10% of the 98th percentile
"""
threshold = pe.MapNode(interface=fsl.ImageMaths(out_data_type='char',
suffix='_thresh'),
iterfield=['in_file', 'op_string'],
name='threshold')
featpreproc.connect(maskfunc, 'out_file', threshold, 'in_file')
"""
Define a function to get 10% of the intensity
"""
featpreproc.connect(getthresh, ('out_stat', getthreshop), threshold, 'op_string')
"""
Determine the median value of the functional runs using the mask
"""
medianval = pe.MapNode(interface=fsl.ImageStats(op_string='-k %s -p 50'),
iterfield = ['in_file', 'mask_file'],
name='medianval')
featpreproc.connect(motion_correct, 'out_file', medianval, 'in_file')
featpreproc.connect(threshold, 'out_file', medianval, 'mask_file')
"""
Dilate the mask
"""
dilatemask = pe.MapNode(interface=fsl.ImageMaths(suffix='_dil',
op_string='-dilF'),
iterfield=['in_file'],
name='dilatemask')
featpreproc.connect(threshold, 'out_file', dilatemask, 'in_file')
featpreproc.connect(dilatemask, 'out_file', outputnode, 'mask')
"""
Mask the motion corrected functional runs with the dilated mask
"""
maskfunc2 = pe.MapNode(interface=fsl.ImageMaths(suffix='_mask',
op_string='-mas'),
iterfield=['in_file', 'in_file2'],
name='maskfunc2')
featpreproc.connect(motion_correct, 'out_file', maskfunc2, 'in_file')
featpreproc.connect(dilatemask, 'out_file', maskfunc2, 'in_file2')
"""
Smooth each run using SUSAN with the brightness threshold set to 75%
of the median value for each run and a mask consituting the mean
functional
"""
smooth = create_susan_smooth()
featpreproc.connect(inputnode, 'fwhm', smooth, 'inputnode.fwhm')
featpreproc.connect(maskfunc2, 'out_file', smooth, 'inputnode.in_files')
featpreproc.connect(dilatemask, 'out_file', smooth, 'inputnode.mask_file')
"""
Mask the smoothed data with the dilated mask
"""
maskfunc3 = pe.MapNode(interface=fsl.ImageMaths(suffix='_mask',
op_string='-mas'),
iterfield=['in_file', 'in_file2'],
name='maskfunc3')
featpreproc.connect(smooth, 'outputnode.smoothed_files', maskfunc3, 'in_file')
featpreproc.connect(dilatemask, 'out_file', maskfunc3, 'in_file2')
concatnode = pe.Node(interface=util.Merge(2),
name='concat')
featpreproc.connect(maskfunc2,('out_file', tolist), concatnode, 'in1')
featpreproc.connect(maskfunc3,('out_file', tolist), concatnode, 'in2')
"""
The following nodes select smooth or unsmoothed data depending on the
fwhm. This is because SUSAN defaults to smoothing the data with about the
voxel size of the input data if the fwhm parameter is less than 1/3 of the
voxel size.
"""
selectnode = pe.Node(interface=util.Select(),name='select')
featpreproc.connect(concatnode, 'out', selectnode, 'inlist')
featpreproc.connect(inputnode, ('fwhm', chooseindex), selectnode, 'index')
featpreproc.connect(selectnode, 'out', outputnode, 'smoothed_files')
"""
Scale the median value of the run is set to 10000
"""
meanscale = pe.MapNode(interface=fsl.ImageMaths(suffix='_gms'),
iterfield=['in_file','op_string'],
name='meanscale')
featpreproc.connect(selectnode, 'out', meanscale, 'in_file')
"""
Define a function to get the scaling factor for intensity normalization
"""
featpreproc.connect(medianval, ('out_stat', getmeanscale), meanscale, 'op_string')
"""
Perform temporal highpass filtering on the data
"""
if highpass:
highpass = pe.MapNode(interface=fsl.ImageMaths(suffix='_tempfilt'),
iterfield=['in_file'],
name='highpass')
featpreproc.connect(inputnode, ('highpass', highpass_operand), highpass, 'op_string')
featpreproc.connect(meanscale, 'out_file', highpass, 'in_file')
featpreproc.connect(highpass, 'out_file', outputnode, 'highpassed_files')
"""
Generate a mean functional image from the first run
"""
meanfunc3 = pe.MapNode(interface=fsl.ImageMaths(op_string='-Tmean',
suffix='_mean'),
iterfield=['in_file'],
name='meanfunc3')
if highpass:
featpreproc.connect(highpass, 'out_file', meanfunc3, 'in_file')
else:
featpreproc.connect(meanscale, 'out_file', meanfunc3, 'in_file')
featpreproc.connect(meanfunc3, 'out_file', outputnode, 'mean')
return featpreproc
def easy_thresh(wf_name):
"""
Workflow for carrying out cluster-based thresholding
and colour activation overlaying
Parameters
----------
wf_name : string
Workflow name
Returns
-------
easy_thresh : object
Easy thresh workflow object
Notes
-----
`Source <https://github.com/FCP-INDI/C-PAC/blob/master/CPAC/easy_thresh/easy_thresh.py>`_
Workflow Inputs::
inputspec.z_stats : string (nifti file)
z_score stats output for t or f contrast from flameo
inputspec.merge_mask : string (nifti file)
mask generated from 4D Merged derivative file
inputspec.z_threshold : float
Z Statistic threshold value for cluster thresholding. It is used to
determine what level of activation would be statistically significant.
Increasing this will result in higher estimates of required effect.
inputspec.p_threshold : float
Probability threshold for cluster thresholding.
inputspec.paramerters : string (tuple)
tuple containing which MNI and FSLDIR path information
Workflow Outputs::
outputspec.cluster_threshold : string (nifti files)
the thresholded Z statistic image for each t contrast
outputspec.cluster_index : string (nifti files)
image of clusters for each t contrast; the values
in the clusters are the index numbers as used
in the cluster list.
outputspec.overlay_threshold : string (nifti files)
3D color rendered stats overlay image for t contrast
After reloading this image, use the Statistics Color
Rendering GUI to reload the color look-up-table
outputspec.overlay_rendered_image : string (nifti files)
2D color rendered stats overlay picture for each t contrast
outputspec.cluster_localmax_txt : string (text files)
local maxima text file, defines the coordinates of maximum value
in the cluster
Order of commands:
- Estimate smoothness of the image::
smoothest --mask= merge_mask.nii.gz --zstat=.../flameo/stats/zstat1.nii.gz
arguments
--mask : brain mask volume
--zstat : filename of zstat/zfstat image
- Create mask. For details see `fslmaths <http://www.fmrib.ox.ac.uk/fslcourse/lectures/practicals/intro/index.htm#fslutils>`_::
fslmaths ../flameo/stats/zstat1.nii.gz
-mas merge_mask.nii.gz
zstat1_mask.nii.gz
arguments
-mas : use (following image>0) to mask current image
- Copy Geometry image dimensions, voxel dimensions, voxel dimensions units string, image orientation/origin or qform/sform info) from one image to another::
fslcpgeom MNI152_T1_2mm_brain.nii.gz zstat1_mask.nii.gz
- Cluster based thresholding. For details see `FEAT <http://www.fmrib.ox.ac.uk/fsl/feat5/detail.html#poststats>`_::
cluster --dlh = 0.0023683100
--in = zstat1_mask.nii.gz
--oindex = zstat1_cluster_index.nii.gz
--olmax = zstat1_cluster_localmax.txt
--othresh = zstat1_cluster_threshold.nii.gz
--pthresh = 0.0500000000
--thresh = 2.3000000000
--volume = 197071
arguments
--in : filename of input volume
--dlh : smoothness estimate = sqrt(det(Lambda))
--oindex : filename for output of cluster index
--othresh : filename for output of thresholded image
--olmax : filename for output of local maxima text file
--volume : number of voxels in the mask
--pthresh : p-threshold for clusters
--thresh : threshold for input volume
Z statistic image is thresholded to show which voxels or clusters of voxels are activated at a particular significance level.
A Z statistic threshold is used to define contiguous clusters. Then each cluster's estimated significance level (from GRF-theory)
is compared with the cluster probability threshold. Significant clusters are then used to mask the original Z statistic image.
- Get the maximum intensity value of the output thresholded image. This used is while rendering the Z statistic image::
fslstats zstat1_cluster_threshold.nii.gz -R
arguments
-R : output <min intensity> <max intensity>
- Rendering. For details see `FEAT <http://www.fmrib.ox.ac.uk/fsl/feat5/detail.html#poststats>`_::
overlay 1 0 MNI152_T1_2mm_brain.nii.gz
-a zstat1_cluster_threshold.nii.gz
2.30 15.67
zstat1_cluster_threshold_overlay.nii.gz
slicer zstat1_cluster_threshold_overlay.nii.gz
-L -A 750
zstat1_cluster_threshold_overlay.png
The Z statistic range selected for rendering is automatically calculated by default,
to run from red (minimum Z statistic after thresholding) to yellow (maximum Z statistic, here
maximum intensity).
High Level Workflow Graph:
.. image:: ../images/easy_thresh.dot.png
:width: 800
Detailed Workflow Graph:
.. image:: ../images/easy_thresh_detailed.dot.png
:width: 800
Examples
--------
>>> import easy_thresh
>>> preproc = easy_thresh.easy_thresh("new_workflow")
>>> preproc.inputs.inputspec.z_stats= 'flameo/stats/zstat1.nii.gz'
>>> preproc.inputs.inputspec.merge_mask = 'merge_mask/alff_Z_fn2standard_merged_mask.nii.gz'
>>> preproc.inputs.inputspec.z_threshold = 2.3
>>> preproc.inputs.inputspec.p_threshold = 0.05
>>> preproc.inputs.inputspec.parameters = ('/usr/local/fsl/', 'MNI152')
>>> preporc.run() -- SKIP doctest
"""
easy_thresh = pe.Workflow(name=wf_name)
inputnode = pe.Node(util.IdentityInterface(fields=[
'z_stats', 'merge_mask', 'z_threshold', 'p_threshold', 'parameters'
]),
name='inputspec')
outputnode = pe.Node(util.IdentityInterface(fields=[
'cluster_threshold', 'cluster_index', 'cluster_localmax_txt',
'overlay_threshold', 'rendered_image'
]),
name='outputspec')
### fsl easythresh
# estimate image smoothness
smooth_estimate = pe.MapNode(interface=fsl.SmoothEstimate(),
name='smooth_estimate',
iterfield=['zstat_file'])
# run clustering after fixing stats header for talspace
zstat_mask = pe.MapNode(interface=fsl.MultiImageMaths(),
name='zstat_mask',
iterfield=['in_file'])
#operations to perform
#-mas use (following image>0) to mask current image
zstat_mask.inputs.op_string = '-mas %s'
#fslcpgeom
#copy certain parts of the header information (image dimensions,
#voxel dimensions, voxel dimensions units string, image orientation/origin
#or qform/sform info) from one image to another
copy_geometry = pe.MapNode(util.Function(
input_names=['infile_a', 'infile_b'],
output_names=['out_file'],
function=copy_geom),
name='copy_geometry',
iterfield=['infile_a', 'infile_b'])
##cluster-based thresholding
#After carrying out the initial statistical test, the resulting
#Z statistic image is then normally thresholded to show which voxels or
#clusters of voxels are activated at a particular significance level.
#A Z statistic threshold is used to define contiguous clusters.
#Then each cluster's estimated significance level (from GRF-theory) is
#compared with the cluster probability threshold. Significant clusters
#are then used to mask the original Z statistic image for later production
#of colour blobs.This method of thresholding is an alternative to
#Voxel-based correction, and is normally more sensitive to activation.
# cluster = pe.MapNode(interface=fsl.Cluster(),
# name='cluster',
# iterfield=['in_file', 'volume', 'dlh'])
# #output of cluster index (in size order)
# cluster.inputs.out_index_file = True
# #thresholded image
# cluster.inputs.out_threshold_file = True
# #local maxima text file
# #defines the cluster cordinates
# cluster.inputs.out_localmax_txt_file = True
cluster = pe.MapNode(util.Function(
input_names=[
'in_file', 'volume', 'dlh', 'threshold', 'pthreshold', 'parameters'
],
output_names=['index_file', 'threshold_file', 'localmax_txt_file'],
function=call_cluster),
name='cluster',
iterfield=['in_file', 'volume', 'dlh'])
#max and minimum intensity values
image_stats = pe.MapNode(interface=fsl.ImageStats(),
name='image_stats',
iterfield=['in_file'])
image_stats.inputs.op_string = '-R'
#create tuple of z_threshold and max intensity value of threshold file
create_tuple = pe.MapNode(util.Function(
input_names=['infile_a', 'infile_b'],
output_names=['out_file'],
function=get_tuple),
name='create_tuple',
iterfield=['infile_b'])
#colour activation overlaying
overlay = pe.MapNode(interface=fsl.Overlay(),
name='overlay',
iterfield=['stat_image', 'stat_thresh'])
overlay.inputs.transparency = True
overlay.inputs.auto_thresh_bg = True
overlay.inputs.out_type = 'float'
#colour rendering
slicer = pe.MapNode(interface=fsl.Slicer(),
name='slicer',
iterfield=['in_file'])
#set max picture width
slicer.inputs.image_width = 750
# set output all axial slices into one picture
slicer.inputs.all_axial = True
#function mapnode to get the standard fsl brain image
#based on parameters as FSLDIR,MNI and voxel size
get_backgroundimage = pe.MapNode(util.Function(
input_names=['in_file', 'file_parameters'],
output_names=['out_file'],
function=get_standard_background_img),
name='get_bckgrndimg1',
iterfield=['in_file'])
#function node to get the standard fsl brain image
#outputs single file
get_backgroundimage2 = pe.Node(util.Function(
input_names=['in_file', 'file_parameters'],
output_names=['out_file'],
function=get_standard_background_img),
name='get_backgrndimg2')
#connections
easy_thresh.connect(inputnode, 'z_stats', smooth_estimate, 'zstat_file')
easy_thresh.connect(inputnode, 'merge_mask', smooth_estimate, 'mask_file')
easy_thresh.connect(inputnode, 'z_stats', zstat_mask, 'in_file')
easy_thresh.connect(inputnode, 'merge_mask', zstat_mask, 'operand_files')
easy_thresh.connect(zstat_mask, 'out_file', get_backgroundimage, 'in_file')
easy_thresh.connect(inputnode, 'parameters', get_backgroundimage,
'file_parameters')
easy_thresh.connect(get_backgroundimage, 'out_file', copy_geometry,
'infile_a')
easy_thresh.connect(zstat_mask, 'out_file', copy_geometry, 'infile_b')
easy_thresh.connect(copy_geometry, 'out_file', cluster, 'in_file')
easy_thresh.connect(inputnode, 'z_threshold', cluster, 'threshold')
easy_thresh.connect(inputnode, 'p_threshold', cluster, 'pthreshold')
easy_thresh.connect(smooth_estimate, 'volume', cluster, 'volume')
easy_thresh.connect(smooth_estimate, 'dlh', cluster, 'dlh')
easy_thresh.connect(inputnode, 'parameters', cluster, 'parameters')
easy_thresh.connect(cluster, 'threshold_file', image_stats, 'in_file')
easy_thresh.connect(image_stats, 'out_stat', create_tuple, 'infile_b')
easy_thresh.connect(inputnode, 'z_threshold', create_tuple, 'infile_a')
easy_thresh.connect(cluster, 'threshold_file', overlay, 'stat_image')
easy_thresh.connect(create_tuple, 'out_file', overlay, 'stat_thresh')
easy_thresh.connect(inputnode, 'merge_mask', get_backgroundimage2,
'in_file')
easy_thresh.connect(inputnode, 'parameters', get_backgroundimage2,
'file_parameters')
easy_thresh.connect(get_backgroundimage2, 'out_file', overlay,
'background_image')
easy_thresh.connect(overlay, 'out_file', slicer, 'in_file')
easy_thresh.connect(cluster, 'threshold_file', outputnode,
'cluster_threshold')
easy_thresh.connect(cluster, 'index_file', outputnode, 'cluster_index')
easy_thresh.connect(cluster, 'localmax_txt_file', outputnode,
'cluster_localmax_txt')
easy_thresh.connect(overlay, 'out_file', outputnode, 'overlay_threshold')
easy_thresh.connect(slicer, 'out_file', outputnode, 'rendered_image')
return easy_thresh
def create_feat_preproc_wf(name='feat_preproc'):
feat = pe.Workflow(name=name)
feat.config['execution']['remove_unnecessary_outputs'] = False
# define inputs
inputspec = pe.Node(ul.IdentityInterface(fields=['in_file', 'highpass', 'TR']),
name='inputspec')
# Get 2 and 98th percentiles
getthresh = pe.MapNode(interface=fsl.ImageStats(op_string='-p 2 -p 98'),
iterfield=['in_file'],
name='getthreshold')
# Threshold the first run of the functional data at 10% of the 98th percentile
threshold = pe.MapNode(interface=fsl.ImageMaths(out_data_type='char',
suffix='_thresh'),
name='threshold', iterfield=['in_file', 'op_string'])
# get median value using the mask
medianval = pe.MapNode(interface=fsl.ImageStats(op_string='-k %s -p 50'),
iterfield=['in_file', 'mask_file'],
name='medianval')
# dilate the mask
dilatemask = pe.MapNode(interface=fsl.ImageMaths(suffix='_dil',
op_string='-dilF'),
name='dilatemask', iterfield=['in_file'])
# mask the data with dilated mask
maskfunc = pe.MapNode(interface=fsl.ImageMaths(suffix='_mask',
op_string='-mas'),
iterfield=['in_file', 'in_file2'],
name='maskfunc')
# scale the run to have a median of 10000
intnorm = pe.MapNode(interface=fsl.ImageMaths(suffix='_intnorm'),
iterfield=['in_file', 'op_string'],
name='intnorm')
# get the mean from each run
meanfunc = pe.MapNode(interface=fsl.ImageMaths(op_string='-Tmean',
suffix='_mean'),
iterfield=['in_file'],
name='meanfunc')
# calculate the cutoff
calculatehpcutoff = pe.Node(interface=ul.Function(function=highpasssetup, input_names=["highpass", "TR"],
output_names=["op_string"]), name="calculatehpcutoff")
# highpass the data
highpass = pe.MapNode(interface=fsl.ImageMaths(suffix='_tempfilt'),
iterfield=['in_file','in_file2'],
name='highpass')
highpass.inputs.suffix = '_hpf'
# outputspec
outputspec = pe.Node(ul.IdentityInterface(fields=['filtered_functional_data',
'mean_file','scalingfactor']),
name='outputspec')
feat.connect([(inputspec, getthresh, [('in_file', 'in_file')]),
(inputspec, threshold, [('in_file', 'in_file')]),
(inputspec, medianval, [('in_file', 'in_file')]),
(inputspec, calculatehpcutoff, [('highpass', 'highpass'),
('TR', 'TR')]),
(getthresh, threshold, [(('out_stat', getthreshop), 'op_string')]),
(threshold, medianval, [('out_file', 'mask_file')]),
(threshold, dilatemask, [('out_file', 'in_file')]),
(inputspec, maskfunc, [('in_file', 'in_file')]),
(dilatemask, maskfunc, [('out_file', 'in_file2')]),
(maskfunc, intnorm, [('out_file', 'in_file')]),
(medianval, intnorm, [(('out_stat', getinormscale), 'op_string')]),
(intnorm, meanfunc, [('out_file', 'in_file')]),
(calculatehpcutoff, highpass, [('op_string', 'op_string')]),
(intnorm, highpass, [('out_file', 'in_file')]),
(meanfunc, highpass, [('out_file', 'in_file2')]),
(highpass, outputspec, [('out_file','filtered_functional_data')]),
(meanfunc, outputspec, [(('out_file', pickfirst), 'mean_file')]),
(medianval, outputspec, [('out_stat', 'scalingfactor')])
])
return feat
import os, datetime, sys
import nipype.interfaces.io as nio # Data i/o
import nipype.interfaces.fsl as fsl # fsl
import nipype.interfaces.utility as util # utility
import nipype.pipeline.engine as pe # pypeline engine
import utils # code by AM specific to this project but multiple workflows
fsl.FSLCommand.set_default_output_type('NIFTI_GZ')
#Set up model fitting workflow (we assume data has been preprocessed with fmriprep)
wf = pe.Workflow(name='assignmp')
applymask = pe.Node(interface=fsl.ApplyMask(), name="applymask", input_names=["in_file", "mask_file"])
get_percentile_threshold = pe.Node(interface=fsl.ImageStats(), name="get_percentile_threshold", input_names=["in_file", "op_string"])
assign_voxels = pe.MapNode(interface=fsl.ImageMaths(), name="assign_voxels", iterfield=["op_string"])
wf.connect([
(applymask, get_percentile_threshold, [('out_file', 'in_file')]),
(applymask, assign_voxels, [('out_file', 'in_file')]),
(get_percentile_threshold, assign_voxels, [(('out_stat', utils.fslmaths_threshold_roi_opstring), 'op_string')]),
])
# Data input and configuration!
infosource = pe.Node(util.IdentityInterface(fields=['cope_file', 'roi_mask', 'percentile_threshold', 'out_files']),
name="infosource", output_names=["rois"])
# output
datasink = pe.Node(nio.DataSink(), name='datasink')
wf.connect([
def plot_vbm_correlation(vbm_4D_image, mat, p_value_image):
import numpy as np
import matplotlib.pyplot as plt
import nipype.interfaces.fsl as fsl
import ntpath
import sys
import matplotlib
import os
img_basename_no_ext = ntpath.basename(vbm_4D_image)[:-7]
mat_basename_no_ext = ntpath.basename(mat)[:-4]
contrast_no = ntpath.basename(p_value_image)[-9:-7]
# get the coordinates of voxel with highest p value
fslstats = fsl.ImageStats()
fslstats.inputs.in_file = p_value_image
fslstats.inputs.op_string = '-x' # returns co-ordinates of maximum voxel
stat_output = fslstats.run()
voxel_coordinate = stat_output.outputs.out_stat
# convert coordinates to int from float to suit fslmeants
voxel_coordinate = [int(dim) for dim in voxel_coordinate]
# we use fslmeants from fsl to get the intensity of the 4D image from a specific coordinate
# fslmeants -i 4d_image -c 47 73 9
fslmeants = fsl.ImageMeants()
fslmeants.inputs.in_file = vbm_4D_image
fslmeants.inputs.spatial_coord = voxel_coordinate
outputs = fslmeants.run()
# here the output is not displayed on the screen, rather as a simple txt
# the return results are in dict format, we extract the name of the file
ts = outputs.outputs.get()['out_file']
voxel_values = np.loadtxt(ts) # returns the values as an array
voxel_values = list(voxel_values)
# now we extract the behavior vector from .mat file
f = open(mat, 'r')
lines = f.readlines()
f.close()
behav = []
i = 5
for item in lines:
while i < 37:
behav.append(float(lines[i][13:-2]))
i = i + 1
# now we have a list
# sanity check
print("length of voxel_values -> {0}".format(len(voxel_values)))
print("length of behav_values -> {0}".format(len(behav)))
if len(voxel_values) != len(behav):
sys.error('######ERROR####')
# the regression line
coef = np.polyfit(voxel_values, behav, 1)
poly1d_fn = np.poly1d(coef)
# get the correlation coeeficient
# round to 4 digits after the decimal point
correlation_coef = round(np.corrcoef(voxel_values, behav)[0, 1], 5)
plt.rcParams['font.family'] = 'Arial'
ax = plt.axes()
ax.spines['bottom'].set_color('#ffffffff')
ax.spines['top'].set_color('#ffffffff')
ax.spines['right'].set_color('#ffffffff')
ax.spines['left'].set_color('#ffffffff')
ax.tick_params(axis='x', colors='#ffffffff')
ax.tick_params(axis='y', colors='#ffffffff')
plt.xticks(fontsize=14, rotation=45, color='#ffffffff')
plt.yticks(fontsize=14, color='#ffffffff')
plt.scatter(voxel_values[:16], behav[:16], marker='o', color='#e41a1c') # e41a1c -> red
plt.scatter(voxel_values[16:], behav[16:], marker='<', color='#377eb8') # 377eb8 -> blue
plt.ylabel("{0}".format(mat_basename_no_ext), fontsize=18, fontname='Arial', color='#ffffffff')
plt.plot(voxel_values, poly1d_fn(voxel_values), color='#ffffffff') # plot the regression line
# type the coef on the graph, first two arguments the coordinates of the text (top left corner)
plt.text(min(voxel_values), max(behav), "r $= {0}$".format(
correlation_coef), fontname="Arial", style='italic', fontsize=14, color='#ffffffff')
plt.savefig("/Users/amr/Dropbox/thesis/3D/VBM_corr/{0}_{1}_{2}.svg".format(
img_basename_no_ext, mat_basename_no_ext, contrast_no), format='svg')
plt.close()
os.remove(ts) # delete the file of the voxel values as it is no longer needed
os.remove('stat_result.json')
def prepare_flair_intNorm(flair_prep_dir, out_dir, wd_dir, crash_dir, subjects_sessions, flair_acq, n_cpu=-1):
out_dir.mkdir(exist_ok=True, parents=True)
export_version(out_dir)
wf = Workflow(name="prepare_flair_intNorm")
wf.base_dir = wd_dir
wf.config.remove_unnecessary_outputs = False
wf.config["execution"]["crashdump_dir"] = crash_dir
wf.config["monitoring"]["enabled"] = "true"
subjects, sessions = list(zip(*subjects_sessions))
infosource = Node(niu.IdentityInterface(fields=["subject", "session", "flair_acq"]), name="infosource")
infosource.iterables = [("subject", subjects),
("session", sessions),
]
infosource.synchronize = True
def subject_info_fnc(flair_prep_dir, subject, session, flair_acq):
from pathlib import Path
sub_ses = f"sub-{subject}_ses-{session}"
flair_files = list(Path(flair_prep_dir).glob(
f"sub-{subject}/ses-{session}/anat/{sub_ses}_acq-{flair_acq}_*_FLAIR_biascorr.nii.gz"))
assert len(flair_files) == 1, f"Expected one file, but found {flair_files}"
flair_file = flair_files[0]
brain_masks = list(Path(flair_prep_dir).glob(
f"sub-{subject}/ses-{session}/anat/{sub_ses}_space-flair{flair_acq}_desc-brainmask.nii.gz"))
assert len(brain_masks) > 0, f"Expected one file, but found {brain_masks}"
brain_mask = brain_masks[0]
out_list = [flair_file, brain_mask]
return [str(o) for o in out_list] # as Path is not taken everywhere
grabber = Node(niu.Function(input_names=["flair_prep_dir", "subject", "session", "flair_acq"],
output_names=["flair_file", "brain_mask"],
function=subject_info_fnc),
name="grabber"
)
grabber.inputs.flair_prep_dir = flair_prep_dir
grabber.inputs.flair_acq = flair_acq
wf.connect([(infosource, grabber, [("subject", "subject"),
("session", "session"),
]
)
]
)
# adapted from https://gist.github.com/lebedov/94f1caf8a792d80cd91e7b99c1a0c1d7
# Intensity normalization - subtract minimum, then divide by difference of maximum and minimum:
img_range = Node(interface=fsl.ImageStats(op_string='-k %s -R'), name='img_range')
wf.connect(grabber, "flair_file", img_range, "in_file")
wf.connect(grabber, "brain_mask", img_range, "mask_file")
def func(in_stat):
min_val, max_val = in_stat
return '-sub %s -div %s' % (min_val, (max_val - min_val))
stat_to_op_string = Node(interface=niu.Function(input_names=['in_stat'],
output_names=['op_string'],
function=func),
name='stat_to_op_string', iterfield=['in_stat'])
wf.connect(img_range, "out_stat", stat_to_op_string, "in_stat")
flair_normalized = Node(interface=fsl.ImageMaths(), name='flair_normalized')
wf.connect(stat_to_op_string, "op_string", flair_normalized, "op_string")
wf.connect(grabber, "flair_file", flair_normalized, "in_file")
base_directory = str(out_dir.parent)
out_path_base = str(out_dir.name)
ds_flair_biascorr_intNorm = Node(DerivativesDataSink(base_directory=base_directory, out_path_base=out_path_base),
name="ds_flair_biascorr_intNorm")
ds_flair_biascorr_intNorm.inputs.suffix = "FLAIR_biascorrIntNorm"
wf.connect(flair_normalized, "out_file", ds_flair_biascorr_intNorm, "in_file")
wf.connect(grabber, "flair_file", ds_flair_biascorr_intNorm, "source_file")
wf.run(plugin='MultiProc', plugin_args={'n_procs': n_cpu})
def get_mask_vox(self, msk):
mask_stat = fsl.ImageStats(in_file=msk, op_string=' -V')
mask_run = mask_stat.run()
mask_vox = list(mask_run.outputs.out_stat)
return mask_vox[0]
def create_prep(name='preproc'):
""" Base preprocessing workflow for task and resting state fMRI
Parameters
----------
name : name of workflow. Default = 'preproc'
Inputs
------
inputspec.fssubject_id :
inputspec.fssubject_dir :
inputspec.func :
inputspec.highpass :
inputspec.num_noise_components :
inputspec.ad_normthresh :
inputspec.ad_zthresh :
inputspec.tr :
inputspec.interleaved :
inputspec.sliceorder :
inputspec.compcor_select :
inputspec.highpass_sigma :
inputspec.lowpass_sigma :
inputspec.reg_params :
inputspec.FM_TEdiff :
inputspec.FM_Echo_spacing :
inputspec.FM_sigma :
Outputs
-------
outputspec.reference :
outputspec.motion_parameters :
outputspec.realigned_files :
outputspec.mask :
outputspec.smoothed_files :
outputspec.highpassed_files :
outputspec.mean :
outputspec.combined_motion :
outputspec.outlier_files :
outputspec.mask :
outputspec.reg_cost :
outputspec.reg_file :
outputspec.noise_components :
outputspec.tsnr_file :
outputspec.stddev_file :
outputspec.filter_file :
outputspec.scaled_files :
outputspec.z_img :
outputspec.motion_plots :
outputspec.FM_unwarped_mean :
outputspec.FM_unwarped_epi :
Returns
-------
workflow : preprocessing workflow
"""
import nipype.interfaces.fsl as fsl # fsl
import nipype.algorithms.rapidart as ra # rapid artifact detection
from nipype.workflows.smri.freesurfer.utils import create_getmask_flow
from modular_nodes import create_mod_smooth, mod_realign, mod_despike
import nipype.pipeline.engine as pe
import nipype.interfaces.utility as util
preproc = pe.Workflow(name=name)
# Compcorr node
compcor = create_compcorr()
# Input node
inputnode = pe.Node(util.IdentityInterface(fields=[
'fssubject_id', 'fssubject_dir', 'func', 'highpass',
'num_noise_components', 'ad_normthresh', 'ad_zthresh', 'tr',
'do_slicetime', 'sliceorder', 'compcor_select', 'highpass_freq',
'lowpass_freq', 'reg_params', 'FM_TEdiff', 'FM_Echo_spacing',
'FM_sigma', 'motion_correct_node', 'smooth_type', 'surface_fwhm',
'filter_type', 'timepoints_to_remove', 'do_whitening',
'regress_before_PCA', 'realign_parameters', 'do_despike', 'anatomical'
]),
name='inputspec')
# Separate input node for FWHM
inputnode_fwhm = pe.Node(util.IdentityInterface(fields=['fwhm']),
name='fwhm_input')
# strip ids
strip_rois = pe.MapNode(fsl.ExtractROI(),
name='extractroi',
iterfield='in_file')
strip_rois.inputs.t_size = -1
preproc.connect(inputnode, 'timepoints_to_remove', strip_rois, 't_min')
# convert BOLD images to float
img2float = pe.MapNode(interface=fsl.ImageMaths(out_data_type='float',
op_string='',
suffix='_dtype'),
iterfield=['in_file'],
name='img2float')
#afni despike
despike = pe.MapNode(util.Function(input_names=['in_file', "do_despike"],
output_names=["out_file"],
function=mod_despike),
name="despike",
iterfield=["in_file"])
preproc.connect(inputnode, "do_despike", despike, "do_despike")
# define the motion correction node
#motion_correct = pe.Node(interface=FmriRealign4d(),
# name='realign')
motion_correct = pe.Node(util.Function(
input_names=[
'node', 'in_file', 'tr', 'do_slicetime', 'sliceorder', "parameters"
],
output_names=['out_file', 'par_file', 'parameter_source'],
function=mod_realign),
name="mod_realign")
preproc.connect(inputnode, 'motion_correct_node', motion_correct, 'node')
# construct motion plots
#plot_motion = pe.MapNode(interface=fsl.PlotMotionParams(in_source='fsl'),
# name='plot_motion',
# iterfield=['in_file'])
# rapidArt for artifactual timepoint detection
ad = pe.Node(ra.ArtifactDetect(save_plot=False), name='artifactdetect')
# extract the mean volume if the first functional run
meanfunc = art_mean_workflow()
# generate a freesurfer workflow that will return the mask
getmask = create_getmask_flow()
# create a SUSAN smoothing workflow, and smooth each run with
# 75% of the median value for each run as the brightness
# threshold.
smooth = create_mod_smooth(name="modular_smooth", separate_masks=False)
preproc.connect(inputnode, 'smooth_type', smooth, 'inputnode.smooth_type')
# choose susan function
"""
The following node selects smooth or unsmoothed data
depending on the fwhm. This is because SUSAN defaults
to smoothing the data with about the voxel size of
the input data if the fwhm parameter is less than 1/3 of
the voxel size.
"""
choosesusan = pe.Node(util.Function(
input_names=['fwhm', 'motion_files', 'smoothed_files'],
output_names=['cor_smoothed_files'],
function=choose_susan),
name='select_smooth')
# scale the median value of each run to 10,000
meanscale = pe.MapNode(interface=fsl.ImageMaths(suffix='_gms'),
iterfield=['in_file', 'op_string'],
name='scale_median')
# determine the median value of the MASKED functional runs
medianval = pe.MapNode(interface=fsl.ImageStats(op_string='-k %s -p 50'),
iterfield=['in_file'],
name='compute_median_val')
# temporal highpass filtering
highpass = pe.MapNode(interface=fsl.ImageMaths(suffix='_tempfilt'),
iterfield=['in_file'],
name='highpass')
# Calculate the z-score of output
zscore = pe.MapNode(interface=util.Function(
input_names=['image', 'outliers'],
output_names=['z_img'],
function=z_image),
name='z_score',
iterfield=['image', 'outliers'])
# declare some node inputs...
#plot_motion.iterables = ('plot_type', ['rotations', 'translations'])
#ad.inputs.parameter_source = 'FSL'
meanfunc.inputs.inputspec.parameter_source = 'FSL'
ad.inputs.mask_type = 'file'
ad.inputs.use_differences = [True, False]
getmask.inputs.inputspec.contrast_type = 't2'
getmask.inputs.register.out_fsl_file = True
fssource = getmask.get_node('fssource')
# make connections...
preproc.connect(inputnode, 'fssubject_id', getmask, 'inputspec.subject_id')
preproc.connect(inputnode, 'ad_normthresh', ad, 'norm_threshold')
preproc.connect(inputnode, 'ad_zthresh', ad, 'zintensity_threshold')
preproc.connect(inputnode, 'tr', motion_correct, 'tr')
preproc.connect(inputnode, 'realign_parameters', motion_correct,
'parameters')
preproc.connect(motion_correct, 'parameter_source', ad, 'parameter_source')
preproc.connect(inputnode, 'do_slicetime', motion_correct, 'do_slicetime')
preproc.connect(inputnode, 'sliceorder', motion_correct, 'sliceorder')
preproc.connect(inputnode, 'compcor_select', compcor, 'inputspec.selector')
preproc.connect(inputnode, 'fssubject_dir', getmask,
'inputspec.subjects_dir')
#preproc.connect(inputnode, 'func',
# img2float, 'in_file')
preproc.connect(inputnode, 'func', strip_rois, 'in_file')
preproc.connect(strip_rois, 'roi_file', img2float, 'in_file')
preproc.connect(img2float, 'out_file', despike, "in_file")
preproc.connect(despike, "out_file", motion_correct, 'in_file')
#preproc.connect(motion_correct, 'par_file',
# plot_motion, 'in_file')
preproc.connect(motion_correct, 'out_file', meanfunc,
'inputspec.realigned_files')
preproc.connect(motion_correct, 'par_file', meanfunc,
'inputspec.realignment_parameters')
preproc.connect(meanfunc, 'outputspec.mean_image', getmask,
'inputspec.source_file')
preproc.connect(inputnode, 'num_noise_components', compcor,
'inputspec.num_components')
preproc.connect(inputnode, 'regress_before_PCA', compcor,
'inputspec.regress_before_PCA')
preproc.connect(motion_correct, 'out_file', compcor,
'inputspec.realigned_file')
preproc.connect(meanfunc, 'outputspec.mean_image', compcor,
'inputspec.mean_file')
preproc.connect(fssource, 'aseg', compcor, 'inputspec.fsaseg_file')
preproc.connect(getmask, ('outputspec.reg_file', pickfirst), compcor,
'inputspec.reg_file')
preproc.connect(ad, 'outlier_files', compcor, 'inputspec.outlier_files')
preproc.connect(motion_correct, 'par_file', compcor,
'inputspec.realignment_parameters')
preproc.connect(motion_correct, 'out_file', ad, 'realigned_files')
preproc.connect(motion_correct, 'par_file', ad, 'realignment_parameters')
preproc.connect(getmask, ('outputspec.mask_file', pickfirst), ad,
'mask_file')
preproc.connect(getmask, ('outputspec.mask_file', pickfirst), medianval,
'mask_file')
preproc.connect(inputnode_fwhm, 'fwhm', smooth, 'inputnode.fwhm')
preproc.connect(motion_correct, 'out_file', smooth, 'inputnode.in_files')
preproc.connect(getmask, ('outputspec.mask_file', pickfirst), smooth,
'inputnode.mask_file')
preproc.connect(getmask, ('outputspec.reg_file', pickfirst), smooth,
'inputnode.reg_file')
preproc.connect(inputnode, 'surface_fwhm', smooth,
'inputnode.surface_fwhm')
preproc.connect(inputnode, 'fssubject_dir', smooth, 'inputnode.surf_dir')
preproc.connect(smooth, 'outputnode.smoothed_files', choosesusan,
'smoothed_files')
preproc.connect(motion_correct, 'out_file', choosesusan, 'motion_files')
preproc.connect(inputnode_fwhm, 'fwhm', choosesusan, 'fwhm')
preproc.connect(choosesusan, 'cor_smoothed_files', meanscale, 'in_file')
preproc.connect(choosesusan, 'cor_smoothed_files', medianval, 'in_file')
preproc.connect(medianval, ('out_stat', getmeanscale), meanscale,
'op_string')
preproc.connect(inputnode, ('highpass', highpass_operand), highpass,
'op_string')
preproc.connect(meanscale, 'out_file', highpass, 'in_file')
preproc.connect(highpass, 'out_file', zscore, 'image')
preproc.connect(ad, 'outlier_files', zscore, 'outliers')
# create output node
outputnode = pe.Node(interface=util.IdentityInterface(fields=[
'mean', 'motion_parameters', 'realigned_files', 'smoothed_files',
'highpassed_files', 'combined_motion', 'outlier_files',
'outlier_stat_files', 'mask', 'reg_cost', 'reg_file', 'reg_fsl_file',
'noise_components', 'tsnr_file', 'stddev_file', 'tsnr_detrended',
'filter_file', 'scaled_files', 'unmasked_fullspectrum', 'z_img',
'motion_plots', 'FM_unwarped_epi', 'FM_unwarped_mean', 'vsm_file',
'bandpassed_file', 'intensity_files', 'noise_mask', 'csf_mask'
]),
name='outputspec')
# make output connection
preproc.connect(meanfunc, 'outputspec.mean_image', outputnode, 'mean')
preproc.connect(motion_correct, 'par_file', outputnode,
'motion_parameters')
preproc.connect(motion_correct, 'out_file', outputnode, 'realigned_files')
preproc.connect(highpass, 'out_file', outputnode, 'highpassed_files')
preproc.connect(ad, 'norm_files', outputnode, 'combined_motion')
preproc.connect(ad, 'outlier_files', outputnode, 'outlier_files')
preproc.connect(ad, 'intensity_files', outputnode, 'intensity_files')
preproc.connect(ad, 'statistic_files', outputnode, 'outlier_stat_files')
preproc.connect(compcor, 'outputspec.noise_components', outputnode,
'noise_components')
preproc.connect(compcor, 'outputspec.noise_mask', outputnode, 'noise_mask')
preproc.connect(compcor, 'outputspec.csf_mask', outputnode, 'csf_mask')
preproc.connect(getmask, 'outputspec.mask_file', outputnode, 'mask')
preproc.connect(getmask, 'register.out_fsl_file', outputnode,
'reg_fsl_file')
preproc.connect(getmask, 'outputspec.reg_file', outputnode, 'reg_file')
preproc.connect(getmask, 'outputspec.reg_cost', outputnode, 'reg_cost')
preproc.connect(choosesusan, 'cor_smoothed_files', outputnode,
'smoothed_files')
preproc.connect(compcor, 'outputspec.tsnr_file', outputnode, 'tsnr_file')
preproc.connect(compcor, 'outputspec.stddev_file', outputnode,
'stddev_file')
preproc.connect(compcor, 'outputspec.tsnr_detrended', outputnode,
'tsnr_detrended')
preproc.connect(zscore, 'z_img', outputnode, 'z_img')
#preproc.connect(plot_motion,'out_file',
# outputnode,'motion_plots')
return preproc
fs_voltransform.inputs.subjects_dir = fs_dir
fs_voltransform.inputs.interp = 'nearest'
psb6351_wf.connect(extractref, 'roi_file', fs_voltransform, 'source_file')
psb6351_wf.connect(fs_register, 'out_reg_file', fs_voltransform, 'reg_file')
psb6351_wf.connect(fs_threshold, 'binary_file', fs_voltransform, 'target_file')
# Mask the functional runs with the extracted mask
maskfunc = pe.MapNode(fsl.ImageMaths(suffix='_bet', op_string='-mas'),
iterfield=['in_file'],
name='maskfunc')
psb6351_wf.connect(tshifter, 'out_file', maskfunc, 'in_file')
psb6351_wf.connect(fs_voltransform, 'transformed_file', maskfunc, 'in_file2')
# Smooth each run using SUSAn with the brightness threshold set to 75%
# of the median value for each run and a mask constituting the mean functional
smooth_median = pe.MapNode(fsl.ImageStats(op_string='-k %s -p 50'),
iterfield=['in_file'],
name='smooth_median')
psb6351_wf.connect(maskfunc, 'out_file', smooth_median, 'in_file')
psb6351_wf.connect(fs_voltransform, 'transformed_file', smooth_median,
'mask_file')
# Calculate the mean functional
smooth_meanfunc = pe.MapNode(fsl.ImageMaths(op_string='-Tmean',
suffix='_mean'),
iterfield=['in_file'],
name='smooth_meanfunc')
psb6351_wf.connect(maskfunc, 'out_file', smooth_meanfunc, 'in_file')
smooth_merge = pe.Node(util.Merge(2, axis='hstack'), name='smooth_merge')
psb6351_wf.connect(smooth_meanfunc, 'out_file', smooth_merge, 'in1')
NodeHash_30f69e0.inputs.anon = True
NodeHash_30f69e0.inputs.bucket_path = 'ds000101/ds000101_R2.0.0/uncompressed/'
NodeHash_30f69e0.inputs.local_directory = '/tmp'
#Wraps command **slicetimer**
NodeHash_1d000c0 = pe.Node(interface=fsl.SliceTimer(), name='NodeName_1d000c0')
#Wraps command **mcflirt**
NodeHash_22f2e80 = pe.Node(interface=fsl.MCFLIRT(), name='NodeName_22f2e80')
#Computes the time-course SNR for a time series
NodeHash_50c02c0 = pe.Node(interface=confounds.TSNR(), name='NodeName_50c02c0')
NodeHash_50c02c0.inputs.regress_poly = 3
#Wraps command **fslstats**
NodeHash_3ac27f0 = pe.Node(interface=fsl.ImageStats(), name='NodeName_3ac27f0')
NodeHash_3ac27f0.inputs.op_string = '-p 98'
#Wraps command **fslmaths**
NodeHash_30f6760 = pe.Node(interface=fsl.Threshold(), name='NodeName_30f6760')
NodeHash_30f6760.inputs.args = '-bin'
#Anatomical compcor: for inputs and outputs, see CompCor.
NodeHash_325da10 = pe.Node(interface=confounds.ACompCor(),
name='NodeName_325da10')
NodeHash_325da10.inputs.num_components = 2
#Wraps command **fsl_regfilt**
NodeHash_430d1e0 = pe.Node(interface=fsl.FilterRegressor(),
name='NodeName_430d1e0')
NodeHash_430d1e0.inputs.filter_columns = [1, 2]
def create_susan_smooth(name="susan_smooth", separate_masks=True):
"""Create a SUSAN smoothing workflow
Parameters
----------
::
name : name of workflow (default: susan_smooth)
separate_masks : separate masks for each run
Inputs::
inputnode.in_files : functional runs (filename or list of filenames)
inputnode.fwhm : fwhm for smoothing with SUSAN (float or list of floats)
inputnode.mask_file : mask used for estimating SUSAN thresholds (but not for smoothing)
Outputs::
outputnode.smoothed_files : functional runs (filename or list of filenames)
Example
-------
>>> smooth = create_susan_smooth()
>>> smooth.inputs.inputnode.in_files = 'f3.nii'
>>> smooth.inputs.inputnode.fwhm = 5
>>> smooth.inputs.inputnode.mask_file = 'mask.nii'
>>> smooth.run() # doctest: +SKIP
"""
# replaces the functionality of a "for loop"
def cartesian_product(fwhms, in_files, usans, btthresh):
from nipype.utils.filemanip import ensure_list
# ensure all inputs are lists
in_files = ensure_list(in_files)
fwhms = [fwhms] if isinstance(fwhms, (int, float)) else fwhms
# create cartesian product lists (s_<name> = single element of list)
cart_in_file = [s_in_file for s_in_file in in_files for s_fwhm in fwhms]
cart_fwhm = [s_fwhm for s_in_file in in_files for s_fwhm in fwhms]
cart_usans = [s_usans for s_usans in usans for s_fwhm in fwhms]
cart_btthresh = [s_btthresh for s_btthresh in btthresh for s_fwhm in fwhms]
return cart_in_file, cart_fwhm, cart_usans, cart_btthresh
susan_smooth = pe.Workflow(name=name)
"""
Set up a node to define all inputs required for the preprocessing workflow
"""
inputnode = pe.Node(
interface=util.IdentityInterface(fields=["in_files", "fwhm", "mask_file"]),
name="inputnode",
)
"""
Smooth each run using SUSAN with the brightness threshold set to 75%
of the median value for each run and a mask consituting the mean
functional
"""
multi_inputs = pe.Node(
util.Function(
function=cartesian_product,
output_names=["cart_in_file", "cart_fwhm", "cart_usans", "cart_btthresh"],
),
name="multi_inputs",
)
smooth = pe.MapNode(
interface=fsl.SUSAN(),
iterfield=["in_file", "brightness_threshold", "usans", "fwhm"],
name="smooth",
)
"""
Determine the median value of the functional runs using the mask
"""
if separate_masks:
median = pe.MapNode(
interface=fsl.ImageStats(op_string="-k %s -p 50"),
iterfield=["in_file", "mask_file"],
name="median",
)
else:
median = pe.MapNode(
interface=fsl.ImageStats(op_string="-k %s -p 50"),
iterfield=["in_file"],
name="median",
)
susan_smooth.connect(inputnode, "in_files", median, "in_file")
susan_smooth.connect(inputnode, "mask_file", median, "mask_file")
"""
Mask the motion corrected functional runs with the dilated mask
"""
if separate_masks:
mask = pe.MapNode(
interface=fsl.ImageMaths(suffix="_mask", op_string="-mas"),
iterfield=["in_file", "in_file2"],
name="mask",
)
else:
mask = pe.MapNode(
interface=fsl.ImageMaths(suffix="_mask", op_string="-mas"),
iterfield=["in_file"],
name="mask",
)
susan_smooth.connect(inputnode, "in_files", mask, "in_file")
susan_smooth.connect(inputnode, "mask_file", mask, "in_file2")
"""
Determine the mean image from each functional run
"""
meanfunc = pe.MapNode(
interface=fsl.ImageMaths(op_string="-Tmean", suffix="_mean"),
iterfield=["in_file"],
name="meanfunc2",
)
susan_smooth.connect(mask, "out_file", meanfunc, "in_file")
"""
Merge the median values with the mean functional images into a coupled list
"""
merge = pe.Node(interface=util.Merge(2, axis="hstack"), name="merge")
susan_smooth.connect(meanfunc, "out_file", merge, "in1")
susan_smooth.connect(median, "out_stat", merge, "in2")
"""
Define a function to get the brightness threshold for SUSAN
"""
susan_smooth.connect(
[
(inputnode, multi_inputs, [("in_files", "in_files"), ("fwhm", "fwhms")]),
(median, multi_inputs, [(("out_stat", getbtthresh), "btthresh")]),
(merge, multi_inputs, [(("out", getusans), "usans")]),
(
multi_inputs,
smooth,
[
("cart_in_file", "in_file"),
("cart_fwhm", "fwhm"),
("cart_btthresh", "brightness_threshold"),
("cart_usans", "usans"),
],
),
]
)
outputnode = pe.Node(
interface=util.IdentityInterface(fields=["smoothed_files"]), name="outputnode"
)
susan_smooth.connect(smooth, "smoothed_file", outputnode, "smoothed_files")
return susan_smooth
susan_smooth = [[] for _ in range(len(kernel_values))]
smooth_median = [[] for _ in range(len(kernel_values))]
smooth_meanfunc = [[] for _ in range(len(kernel_values))]
smooth_merge = [[] for _ in range(len(kernel_values))]
fsl_smooth = [[] for _ in range(len(kernel_values))]
for i, kernel in enumerate(kernel_values):
#
#
### SUSAN Smoothing
#
#
# Smooth each run using SUSAN with the brightness threshold set to 75%
# of the median value for each run and a mask constituting the mean
# functional
smooth_median[i] = pe.MapNode(
fsl.ImageStats(op_string='-k %s -p 50'),
iterfield=['in_file'],
name='susan_smooth_median_{0}'.format(kernel))
preproc_wf.connect(maskfunc, 'out_file', smooth_median[i], 'in_file')
preproc_wf.connect(fs_threshold2, ('binary_file', pickfirst),
smooth_median[i], 'mask_file')
smooth_meanfunc[i] = pe.MapNode(
fsl.ImageMaths(op_string='-Tmean', suffix='_mean'),
iterfield=['in_file'],
name='susan_smooth_meanfunc_{0}'.format(kernel))
preproc_wf.connect(maskfunc, 'out_file', smooth_meanfunc[i], 'in_file')
smooth_merge[i] = pe.Node(util.Merge(2, axis='hstack'),
name='susan_smooth_merge_{0}'.format(kernel))
preproc_wf.connect(smooth_meanfunc[i], 'out_file', smooth_merge[i], 'in1')
def create_resting_preproc(name='restpreproc'):
"""Create a "resting" time series preprocessing workflow
The noise removal is based on Behzadi et al. (2007)
Parameters
----------
name : name of workflow (default: restpreproc)
Inputs::
inputspec.func : functional run (filename or list of filenames)
Outputs::
outputspec.noise_mask_file : voxels used for PCA to derive noise components
outputspec.filtered_file : bandpass filtered and noise-reduced time series
Example
-------
>>> TR = 3.0
>>> wf = create_resting_preproc()
>>> wf.inputs.inputspec.func = 'f3.nii'
>>> wf.inputs.inputspec.num_noise_components = 6
>>> wf.inputs.inputspec.highpass_sigma = 100/(2*TR)
>>> wf.inputs.inputspec.lowpass_sigma = 12.5/(2*TR)
>>> wf.run() # doctest: +SKIP
"""
restpreproc = pe.Workflow(name=name)
# Define nodes
inputnode = pe.Node(interface=util.IdentityInterface(fields=[
'func', 'num_noise_components', 'highpass_sigma', 'lowpass_sigma'
]),
name='inputspec')
outputnode = pe.Node(interface=util.IdentityInterface(fields=[
'noise_mask_file',
'filtered_file',
]),
name='outputspec')
slicetimer = pe.Node(fsl.SliceTimer(), name='slicetimer')
realigner = create_realign_flow()
tsnr = pe.Node(TSNR(regress_poly=2), name='tsnr')
getthresh = pe.Node(interface=fsl.ImageStats(op_string='-p 98'),
name='getthreshold')
threshold_stddev = pe.Node(fsl.Threshold(), name='threshold')
compcor = pe.Node(util.Function(
input_names=['realigned_file', 'noise_mask_file', 'num_components'],
output_names=['noise_components'],
function=extract_noise_components),
name='compcorr')
remove_noise = pe.Node(fsl.FilterRegressor(filter_all=True),
name='remove_noise')
bandpass_filter = pe.Node(fsl.TemporalFilter(), name='bandpass_filter')
# Define connections
restpreproc.connect(inputnode, 'func', slicetimer, 'in_file')
restpreproc.connect(slicetimer, 'slice_time_corrected_file', realigner,
'inputspec.func')
restpreproc.connect(realigner, 'outputspec.realigned_file', tsnr,
'in_file')
restpreproc.connect(tsnr, 'stddev_file', threshold_stddev, 'in_file')
restpreproc.connect(tsnr, 'stddev_file', getthresh, 'in_file')
restpreproc.connect(getthresh, 'out_stat', threshold_stddev, 'thresh')
restpreproc.connect(realigner, 'outputspec.realigned_file', compcor,
'realigned_file')
restpreproc.connect(threshold_stddev, 'out_file', compcor,
'noise_mask_file')
restpreproc.connect(inputnode, 'num_noise_components', compcor,
'num_components')
restpreproc.connect(tsnr, 'detrended_file', remove_noise, 'in_file')
restpreproc.connect(compcor, 'noise_components', remove_noise,
'design_file')
restpreproc.connect(inputnode, 'highpass_sigma', bandpass_filter,
'highpass_sigma')
restpreproc.connect(inputnode, 'lowpass_sigma', bandpass_filter,
'lowpass_sigma')
restpreproc.connect(remove_noise, 'out_file', bandpass_filter, 'in_file')
restpreproc.connect(threshold_stddev, 'out_file', outputnode,
'noise_mask_file')
restpreproc.connect(bandpass_filter, 'out_file', outputnode,
'filtered_file')
return restpreproc
def startRegression(input_File, FWHM, cutOff_sec, TR, sl):
# generate folder regr images
print("Regression \33[5m...\33[0m (wait!)", end="\r")
origin_Path = os.path.dirname(os.path.dirname(input_File))
regr_Path = os.path.join(origin_Path, 'regr')
if os.path.exists(regr_Path):
shutil.rmtree(regr_Path)
os.mkdir(regr_Path)
# generatre log-File
sys.stdout = open(os.path.join(regr_Path, 'regress.log'), 'w')
# delete the first slides
input_File5Sub = delete5Slides(input_File, regr_Path)
# perform slice time correction
if sl == True:
input_File5Sub = fsl_slicetimeCorrector(input_File5Sub, TR)
# proof regression files
txtregr_Path = os.path.join(origin_Path, 'txtRegrPython')
# slive wise regression with physio data
regr_FileReal = fsl_RegrSliceWise(input_File5Sub, txtregr_Path, regr_Path)
# get mean
meanRegr_File = getMean(regr_FileReal, 'mean2')
file_nameEPI_BET, mask_file = applyBET(meanRegr_File,
frac=0.35,
radius=45,
vertical_gradient=0.1)
os.remove(meanRegr_File)
regr_File = applyMask(regr_FileReal, mask_file, '')
# "robust intensity range" which calculates values similar to the 98% percentiles
myStat = fsl.ImageStats(in_file=regr_File,
op_string='-p 98',
terminal_output='allatonce')
print(myStat.cmdline)
stat_result = myStat.run()
upperp = stat_result.outputs.out_stat
# get binary mask
mask = getMask(regr_File, upperp)
# "robust intensity range" which calculates values similar to the 50% percentiles with mask
myStat = fsl.ImageStats(in_file=regr_File,
op_string=' -k ' + mask + ' -p 50 ',
mask_file=mask,
terminal_output='allatonce')
print(myStat.cmdline)
stat_result = myStat.run()
meanintensity = stat_result.outputs.out_stat
meanintensity = meanintensity * 0.75
# maxmium filter of mask
mask = dilF(mask)
# apply mask on regrFile
thresRegr_file = applyMask(regr_File, mask, 'thres')
# get mean of masked regr-Dataset
mean_func = getMean(thresRegr_file, 'mean_func')
# FWHM = 3.0
# sigma = FWHM/(2 * np.sqrt(2 * np.log(2))) = 1.27
srgr_file = applySusan(thresRegr_file, meanintensity, FWHM, mean_func)
# apply mask on srgr_file
smmothSRegr_file = applyMask(srgr_file, mask, '_smooth')
inscalefactor = 10000.0 / meanintensity
# multiply image with inscalefactor
intnormSrgr_file = mathOperation(smmothSRegr_file, inscalefactor)
# mean of scaled Dataset
tempMean = getMean(intnormSrgr_file, 'tempMean')
# filter image cut-off frequency 0.01 Hz
highpass = (cutOff_sec / (2.0 * TR))
#highpass = 17.6056338028
filtered_image = filterFSL(intnormSrgr_file, highpass, tempMean)
sys.stdout = sys.__stdout__
print('Regression \033[0;30;42m COMPLETED \33[0m')
return regr_FileReal, srgr_file, filtered_image