def init_evaluator(directory: str,
result_file_name: str = 'results.csv') -> eval_.Evaluator:
"""Initializes an evaluator.
Args:
directory (str): The directory for the results file.
result_file_name (str): The result file name (CSV file).
Returns:
eval.Evaluator: An evaluator.
"""
os.makedirs(
directory,
exist_ok=True) # generate result directory, if it does not exists
evaluator = eval_.Evaluator(eval_.ConsoleEvaluatorWriter(5))
evaluator.add_writer(
eval_.CSVEvaluatorWriter(os.path.join(directory, result_file_name)))
evaluator.add_label(1, 'WhiteMatter')
evaluator.add_label(2, 'GreyMatter')
evaluator.add_label(3, 'Hippocampus')
evaluator.add_label(4, 'Amygdala')
evaluator.add_label(5, 'Thalamus')
evaluator.metrics = [
metric.DiceCoefficient(),
metric.HausdorffDistance(95)
] # Solutions
# todo: add hausdorff distance, 95th percentile (see metric.HausdorffDistance)
# evaluator.add_metric(metric.HausdorffDistance(95))
# warnings.warn('Initialized evaluation with the Dice coefficient. Do you know other suitable metrics?')
return evaluator
def init_evaluator(directory: str,
result_file_name: str = 'results.csv') -> eval_.Evaluator:
"""Initializes an evaluator.
Args:
directory (str): The directory for the results file.
result_file_name (str): The result file name (CSV file).
Returns:
eval.Evaluator: An evaluator.
"""
os.makedirs(
directory,
exist_ok=True) # generate result directory, if it does not exists
evaluator = eval_.Evaluator(eval_.ConsoleEvaluatorWriter(5))
evaluator.add_writer(
eval_.CSVEvaluatorWriter(os.path.join(directory, result_file_name)))
evaluator.add_label(1, "WhiteMatter")
evaluator.add_label(2, "GreyMatter")
evaluator.add_label(3, "Hippocampus")
evaluator.add_label(4, "Amygdala")
evaluator.add_label(5, "Thalamus")
evaluator.metrics = [metric.DiceCoefficient()]
return evaluator
def init_evaluator(directory: str, result_file_name: str = 'results.csv') -> eval_.Evaluator:
"""Initializes an evaluator.
Args:
directory (str): The directory for the results file.
result_file_name (str): The result file name (CSV file).
Returns:
eval.Evaluator: An evaluator.
"""
os.makedirs(directory, exist_ok=True) # generate result directory, if it does not exists
evaluator = eval_.Evaluator(eval_.ConsoleEvaluatorWriter(5))
evaluator.add_writer(eval_.CSVEvaluatorWriter(os.path.join(directory, result_file_name)))
evaluator.add_label(1, "WhiteMatter")
evaluator.add_label(2, "GreyMatter")
evaluator.add_label(3, "Hippocampus")
evaluator.add_label(4, "Amygdala")
evaluator.add_label(5, "Thalamus")
evaluator.metrics = [metric.DiceCoefficient(),
metric.AreaUnderCurve(),
metric.VolumeSimilarity(),
metric.Accuracy(),
metric.AverageDistance(),
metric.CohenKappaMetric(),
metric.FalseNegative(),
metric.FalsePositive(),
metric.Fallout(),
metric.GroundTruthArea(),
metric.GroundTruthVolume(),
metric.Specificity(),
metric.Sensitivity()
]
return evaluator
def init_evaluator() -> pymia_eval.Evaluator:
evaluator = pymia_eval.Evaluator(pymia_eval.ConsoleEvaluatorWriter(5))
evaluator.add_label(1, 'Structure 1')
evaluator.add_label(2, 'Structure 2')
evaluator.add_label(3, 'Structure 3')
evaluator.add_label(4, 'Structure 4')
evaluator.metrics = [pymia_metric.DiceCoefficient()]
return evaluator
def init_evaluator(csv_file: str=None):
evaluator = pymia_eval.Evaluator(pymia_eval.ConsoleEvaluatorWriter(5))
if csv_file is not None:
evaluator.add_writer(pymia_eval.CSVEvaluatorWriter(csv_file))
evaluator.add_writer(EvaluatorAggregator())
evaluator.metrics = [pymia_metric.DiceCoefficient()]
evaluator.add_label(1, "WhiteMatter")
evaluator.add_label(2, "GreyMatter")
evaluator.add_label(3, "Hippocampus")
evaluator.add_label(4, "Amygdala")
evaluator.add_label(5, "Thalamus")
return evaluator
def init_evaluator(write_to_console: bool = True,
csv_file: str = None,
calculate_distance_metrics: bool = False):
evaluator = eval.Evaluator(EvaluatorAggregator())
if write_to_console:
evaluator.add_writer(eval.ConsoleEvaluatorWriter(5))
if csv_file is not None:
evaluator.add_writer(eval.CSVEvaluatorWriter(csv_file))
if calculate_distance_metrics:
evaluator.metrics = [
pymia_metric.DiceCoefficient(),
pymia_metric.HausdorffDistance(),
pymia_metric.HausdorffDistance(percentile=95, metric='HDRFDST95'),
pymia_metric.VolumeSimilarity()
]
else:
evaluator.metrics = [
pymia_metric.DiceCoefficient(),
pymia_metric.VolumeSimilarity()
]
evaluator.add_label(1, cfg.FOREGROUND_NAME)
return evaluator
def init_evaluator(directory: object, result_file_name: object = 'results.csv') -> object:
"""Initializes an evaluator.
Args:
directory (str): The directory for the results file.
result_file_name (str): The result file name (CSV file).
Returns:
eval.Evaluator: An evaluator.
"""
os.makedirs(directory, exist_ok=True) # generate result directory, if it does not exists
evaluator = eval_.Evaluator(eval_.ConsoleEvaluatorWriter(5))
evaluator.add_writer(eval_.CSVEvaluatorWriter(os.path.join(directory, result_file_name)))
evaluator.add_label(1, 'WhiteMatter')
evaluator.add_label(2, 'GreyMatter')
evaluator.add_label(3, 'Hippocampus')
evaluator.add_label(4, 'Amygdala')
evaluator.add_label(5, 'Thalamus')
evaluator.metrics = [metric.DiceCoefficient(), metric.HausdorffDistance()]
# warnings.warn('Initialized evaluation with the Dice coefficient. Do you know other suitable metrics?')
# you should add more metrics than just the Hausdorff distance!
return evaluator
def main(inputdir: str, csvoutputdir: str, segname: str):
# ! THIS PARAMETER FOR THE DEFORMATION SIGMA HAS TO BE TUNED PER LABEL TO MATCH INTERRATER-VARIABILITY ! #
sigmaarr = np.linspace(2, 8, 31)
subjroot = '/media/yannick/c4a7e8d3-9ac5-463f-b6e6-92e216ae6ac0/MANAGE/data/robustness/preprocessed_segmented'
csvoutputdir = os.path.join(
'/media/yannick/c4a7e8d3-9ac5-463f-b6e6-92e216ae6ac0/MANAGE/data/robustness/segdeform/interrateroutput',
segname)
# make output directory if it does not already exists
if not os.path.isdir(csvoutputdi):
os.makedirs(csvoutputdi)
patlist = os.listdir(subjroot)
evaluator = pymia_eval.Evaluator(pymia_eval.ConsoleEvaluatorWriter(5))
evaluator.add_label(1, segname)
evaluator.add_metric(pymia_metric.DiceCoefficient())
# for sigmaidx, sigma in enumerate(deformation_sigma):
for sigmaval in sigmaarr:
evaluator.add_writer(
pymia_eval.CSVEvaluatorWriter(
os.path.join(csvoutputdir,
'results_' + str(sigmaval) + '.csv')))
for patidx, pat in enumerate(patlist):
# read CET image
img_orig = sitk.ReadImage(
os.path.join(subjroot, pat, pat + '_' + segname + '.nii.gz'))
for runidx_cet in range(0, 100):
deformed = elasticdeform(img_orig, sigmaval)
evaluator.evaluate(
img_orig, deformed,
pat + '_' + str(sigmaval) + '_' + str(runidx_cet))
def atlas_creation():
#Load the train labels_native with their transform
wdpath = 'C:/Users/Admin/PycharmProjects/MyMIALab/data/train'
results_labels_nii = []
results_affine = []
resample_labels = []
for dirpath, subdirs, files in os.walk(wdpath):
for x in files:
if x.endswith("labels_native.nii.gz"):
results_labels_nii.append(os.path.join(dirpath, x))
if x.endswith("affine.txt"):
results_affine.append(os.path.join(dirpath, x))
#Resample the train labels_native with the transform
for i in range(0, len(results_affine)):
transform = sitk.ReadTransform(results_affine[i])
labels_image = sitk.ReadImage(results_labels_nii[i])
resample_image = sitk.Resample(labels_image, transform,
sitk.sitkNearestNeighbor, 0,
labels_image.GetPixelIDValue())
resample_labels.append(resample_image)
#without resample
#resample_labels.append(labels_image)
# Threshold the images to sort them in 5 categories
white_matter_list = []
grey_matter_list = []
hippocampus_list = []
amygdala_list = []
thalamus_list = []
for i in range(0, len(resample_labels)):
white_matter_list.append(sitk.Threshold(resample_labels[i], 1, 1, 0))
grey_matter_list.append(sitk.Threshold(resample_labels[i], 2, 2, 0))
hippocampus_list.append(sitk.Threshold(resample_labels[i], 3, 3, 0))
amygdala_list.append(sitk.Threshold(resample_labels[i], 4, 4, 0))
thalamus_list.append(sitk.Threshold(resample_labels[i], 5, 5, 0))
#sum them up and divide by their number of images to make a probability map
white_matter_map = 0
grey_matter_map = 0
hippocampus_map = 0
amygdala_map = 0
thalamus_map = 0
for i in range(1, len(resample_labels)):
white_matter_map = sitk.Add(white_matter_map, white_matter_list[i])
grey_matter_map = sitk.Add(grey_matter_map, grey_matter_list[i])
hippocampus_map = sitk.Add(hippocampus_map, hippocampus_list[i])
amygdala_map = sitk.Add(amygdala_map, amygdala_list[i])
thalamus_map = sitk.Add(thalamus_map, thalamus_list[i])
white_matter_map = sitk.Divide(white_matter_map, len(white_matter_list))
grey_matter_map = sitk.Divide(grey_matter_map, len(grey_matter_list))
hippocampus_map = sitk.Divide(hippocampus_map, len(hippocampus_list))
amygdala_map = sitk.Divide(amygdala_map, len(amygdala_list))
thalamus_map = sitk.Divide(thalamus_map, len(thalamus_list))
#atlas = sitk.Divide(sum_images, len(test_resample))
#slice = sitk.GetArrayFromImage(atlas)[90,:,:]
#plt.imshow(slice)
sitk.WriteImage(
hippocampus_map,
'C:/Users/Admin/PycharmProjects/MyMIALab/bin/mia-result/hippocampus_map_no_threshold.nii',
False)
sitk.WriteImage(
white_matter_map,
'C:/Users/Admin/PycharmProjects/MyMIALab/bin/mia-result/white_matter_map_no_threshold.nii',
False)
sitk.WriteImage(
grey_matter_map,
'C:/Users/Admin/PycharmProjects/MyMIALab/bin/mia-result/grey_matter_map_no_threshold.nii',
False)
sitk.WriteImage(
amygdala_map,
'C:/Users/Admin/PycharmProjects/MyMIALab/bin/mia-result/amygdala_map_no_threshold.nii',
False)
sitk.WriteImage(
thalamus_map,
'C:/Users/Admin/PycharmProjects/MyMIALab/bin/mia-result/thalamus_map_no_threshold.nii',
False)
#Threhold the 5 different maps to get a binary map
white_matter_map = sitk.BinaryThreshold(white_matter_map, 0, 1, 1, 0)
grey_matter_map = sitk.BinaryThreshold(grey_matter_map, 0, 2, 2, 0)
hippocampus_map = sitk.BinaryThreshold(hippocampus_map, 0, 3, 3, 0)
amygdala_map = sitk.BinaryThreshold(amygdala_map, 0, 4, 4, 0)
thalamus_map = sitk.BinaryThreshold(thalamus_map, 0, 5, 5, 0)
#Save the images
sitk.WriteImage(
grey_matter_map,
'C:/Users/Admin/PycharmProjects/MyMIALab/bin/mia-result/grey_matter_map.nii',
False)
sitk.WriteImage(
white_matter_map,
'C:/Users/Admin/PycharmProjects/MyMIALab/bin/mia-result/white_matter_map.nii',
False)
sitk.WriteImage(
hippocampus_map,
'C:/Users/Admin/PycharmProjects/MyMIALab/bin/mia-result/hippocampus_map.nii',
False)
sitk.WriteImage(
amygdala_map,
'C:/Users/Admin/PycharmProjects/MyMIALab/bin/mia-result/amygdala_map.nii',
False)
sitk.WriteImage(
thalamus_map,
'C:/Users/Admin/PycharmProjects/MyMIALab/bin/mia-result/thalamus_map.nii',
False)
#Load the test labels_native and their transform
wdpath_test = 'C:/Users/Admin/PycharmProjects/MyMIALab/data/test'
test_results_nii = []
test_results_affine = []
test_resample = []
for dirpath, subdirs, files in os.walk(wdpath_test):
for x in files:
if x.endswith("labels_native.nii.gz"):
test_results_nii.append(os.path.join(dirpath, x))
if x.endswith("affine.txt"):
test_results_affine.append(os.path.join(dirpath, x))
#Resample the labels_native with the transform
for i in range(0, len(test_results_affine)):
test_transform = sitk.ReadTransform(test_results_affine[i])
test_image = sitk.ReadImage(test_results_nii[i])
test_resample_image = sitk.Resample(test_image, test_transform,
sitk.sitkNearestNeighbor)
test_resample.append(test_resample_image)
#Without resample
#test_resample.append(test_image)
#Save the first test patient labels
sitk.WriteImage(
test_resample[0],
'C:/Users/Admin/PycharmProjects/MyMIALab/bin/mia-result/test.nii',
False)
#Compute the dice coeefficent (and the Hausdorff distance)
label_list = [
'White Matter', 'Grey Matter', 'Hippocampus', 'Amygdala', 'Thalamus'
]
map_list = [
white_matter_map, grey_matter_map, hippocampus_map, amygdala_map,
thalamus_map
]
dice_list = []
for i in range(0, 5):
evaluator = eval_.Evaluator(eval_.ConsoleEvaluatorWriter(5))
evaluator.metrics = [
metric.DiceCoefficient(),
metric.Sensitivity(),
metric.Precision(),
metric.Fallout()
]
evaluator.add_writer(
eval_.CSVEvaluatorWriter(
os.path.join(
'C:/Users/Admin/PycharmProjects/MyMIALab/bin/mia-result',
'Results_' + label_list[i] + '.csv')))
evaluator.add_label(i + 1, label_list[i])
for j in range(0, len(test_resample)):
evaluator.evaluate(test_resample[j], map_list[i],
'Patient ' + str(j))
def validate_on_subject(self: train.Trainer,
subject_assembler: pymia_asmbl.SubjectAssembler,
config: cfg.Configuration, is_training: bool) -> float:
# prepare filesystem and evaluator
if self.current_epoch % self.save_validation_nth_epoch == 0:
epoch_result_dir = fs.prepare_epoch_result_directory(
config.result_dir, self.current_epoch)
epoch_csv_file = os.path.join(
epoch_result_dir,
'{}_{}{}.csv'.format(os.path.basename(config.result_dir),
self.current_epoch,
'_train' if is_training else ''))
epoch_csv_roi_file = os.path.join(
epoch_result_dir,
'{}_ROI_{}{}.csv'.format(os.path.basename(config.result_dir),
self.current_epoch,
'_train' if is_training else ''))
epoch_csv_roi_summary_file = os.path.join(
epoch_result_dir, '{}_ROI_SUMMARY_{}{}.csv'.format(
os.path.basename(config.result_dir), self.current_epoch,
'_train' if is_training else ''))
epoch_txt_file = os.path.join(
epoch_result_dir,
'{}_{}{}.txt'.format(os.path.basename(config.result_dir),
self.current_epoch,
'_train' if is_training else ''))
if is_training:
writers = [pymia_eval.CSVEvaluatorWriter(epoch_csv_file)]
else:
writers = [
pymia_eval.ConsoleEvaluatorWriter(5),
pymia_eval.CSVEvaluatorWriter(epoch_csv_file)
]
evaluator = eval.Evaluator(writers, metric.get_metrics(), config.maps)
evaluator_roi = eval.ROIEvaluator(
[pymia_eval.CSVEvaluatorWriter(epoch_csv_roi_file)], config.maps,
config.label_file_dir, config.label_files)
elif is_training:
return float(-np.inf)
else:
epoch_result_dir = None
epoch_csv_file = None
epoch_csv_roi_summary_file = None
epoch_txt_file = None
evaluator = eval.Evaluator([pymia_eval.ConsoleEvaluatorWriter(5)],
metric.get_metrics(), config.maps)
evaluator_roi = eval.ROIEvaluator([], config.maps,
config.label_file_dir,
config.label_files)
if not is_training:
print('Epoch {}, {} s:'.format(self._get_current_epoch_formatted(),
self.epoch_duration))
# loop over all subjects
for subject_idx in list(subject_assembler.predictions.keys()):
subject_data = self.data_handler.dataset.direct_extract(
self.data_handler.extractor_test, subject_idx)
subject_name = subject_data['subject']
# for voxel-wise dataset, we need to reshape the voxel-wise data to the original shape
for k, v in subject_data.items():
if isinstance(v, np.ndarray):
subject_data[k] = np.reshape(
v, subject_data[pymia_def.KEY_SHAPE] + (v.shape[-1], ))
# rescale and mask reference maps (clipping will have no influence)
maps = norm.process(subject_data[pymia_def.KEY_LABELS],
subject_data[defs.ID_MASK_FG],
subject_data[defs.KEY_NORM], config.maps)
# rescale, clip, and mask prediction
prediction = subject_assembler.get_assembled_subject(subject_idx)
prediction = np.reshape(
prediction,
subject_data[pymia_def.KEY_SHAPE] + (prediction.shape[-1], ))
prediction = norm.process(prediction, subject_data[defs.ID_MASK_FG],
subject_data[defs.KEY_NORM], config.maps)
# evaluate
evaluator.evaluate(
prediction, maps, {
'FG': subject_data[defs.ID_MASK_FG],
'T1H2O': subject_data[defs.ID_MASK_T1H2O]
}, subject_name)
roi_masks = {
'FG': subject_data[defs.ID_MASK_ROI],
'T1H2O': subject_data[defs.ID_MASK_ROI_T1H2O]
}
evaluator_roi.evaluate(
prediction, roi_masks, {
'FG': subject_data[defs.ID_MASK_FG],
'T1H2O': subject_data[defs.ID_MASK_FG]
}, subject_name)
# Save predictions as SimpleITK images and plot slice images
if not is_training and (self.current_epoch %
self.save_validation_nth_epoch == 0):
subject_results = os.path.join(epoch_result_dir, subject_name)
os.makedirs(subject_results, exist_ok=True)
plotter = plt.QualitativePlotter(subject_results, 2, 'png')
for map_idx, map_name in enumerate(config.maps):
map_name_short = map_name.replace('map', '')
# save predicted maps
prediction_image = pymia_conv.NumpySimpleITKImageBridge.convert(
prediction[..., map_idx],
subject_data[pymia_def.KEY_PROPERTIES])
sitk.WriteImage(
prediction_image,
os.path.join(
subject_results,
'{}_{}.mha'.format(subject_name, map_name_short)),
True)
plotter.plot(
subject_name, map_name, prediction[..., map_idx],
maps[...,
map_idx], subject_data[defs.ID_MASK_T1H2O] if map_name
== defs.ID_MAP_T1H2O else subject_data[defs.ID_MASK_FG])
evaluator.write()
evaluator_roi.write()
# log to TensorBoard
summaries = evaluator.get_summaries()
for result in summaries:
self.logger.log_scalar('{}/{}-MEAN'.format(result.map_, result.metric),
result.mean, self.current_epoch, is_training)
self.logger.log_scalar('{}/{}-STD'.format(result.map_, result.metric),
result.std, self.current_epoch, is_training)
roi_calculator = eval.ROICalculator(config.maps)
roi_results = roi_calculator.calculate(evaluator_roi.results,
config.roi_reference_file)
scores = []
for roi_result in roi_results:
self.logger.log_scalar(
'{}/{}'.format(roi_result.map_, roi_result.metric),
roi_result.mean, self.current_epoch, is_training)
scores.append(roi_result.mean)
summaries.append(roi_result)
print('Aggregated {} results (epoch {}):'.format(
'training' if is_training else 'validation',
self._get_current_epoch_formatted()))
if self.current_epoch % self.save_validation_nth_epoch == 0:
eval.SummaryResultWriter(epoch_txt_file).write(summaries)
stat.QuantitativePlotter(epoch_result_dir).plot(
epoch_csv_file, 'summary_train' if is_training else 'summary',
False if is_training else True)
stat.QuantitativeROIPlotter(epoch_result_dir, config.maps).plot(
epoch_csv_roi_file, config.roi_reference_file,
'train' if is_training else '')
roi_calculator.save_summary(evaluator_roi.results,
config.roi_reference_file,
epoch_csv_roi_summary_file)
else:
eval.SummaryResultWriter().write(summaries)
return float(np.mean(scores)) if not is_training else -math.inf
def load_atlas_custom_images(wdpath):
# params_list = list(data_batch.items())
# print(params_list[0] )
t1w_list = []
t2w_list = []
gt_label_list = []
brain_mask_list = []
transform_list = []
#Load the train labels_native with their transform
for dirpath, subdirs, files in os.walk(wdpath):
# print("dirpath", dirpath)
# print("subdirs", subdirs)
# print("files", files)
for x in files:
if x.endswith("T1native.nii.gz"):
t1w_list.append(sitk.ReadImage(os.path.join(dirpath, x)))
elif x.endswith("T2native.nii.gz"):
t2w_list.append(sitk.ReadImage(os.path.join(dirpath, x)))
elif x.endswith("labels_native.nii.gz"):
gt_label_list.append(sitk.ReadImage(os.path.join(dirpath, x)))
elif x.endswith("Brainmasknative.nii.gz"):
brain_mask_list.append(sitk.ReadImage(os.path.join(dirpath,
x)))
elif x.endswith("affine.txt"):
transform_list.append(
sitk.ReadTransform(os.path.join(dirpath, x)))
# else:
# print("Problem in CustomAtlas in folder", dirpath)
#Resample and thershold to get the label
white_matter_list = []
grey_matter_list = []
hippocampus_list = []
amygdala_list = []
thalamus_list = []
for i in range(0, len(gt_label_list)):
resample_img = sitk.Resample(gt_label_list[i], atlas_t1,
transform_list[i],
sitk.sitkNearestNeighbor, 0,
gt_label_list[i].GetPixelIDValue())
white_matter_list.append(sitk.Threshold(resample_img, 1, 1, 0))
grey_matter_list.append(sitk.Threshold(resample_img, 2, 2, 0))
hippocampus_list.append(sitk.Threshold(resample_img, 3, 3, 0))
amygdala_list.append(sitk.Threshold(resample_img, 4, 4, 0))
thalamus_list.append(sitk.Threshold(resample_img, 5, 5, 0))
#Save each label from first data
path_to_save = '../bin/custom_atlas_result/'
if not os.path.exists(path_to_save):
os.makedirs(path_to_save)
sitk.WriteImage(hippocampus_list[0],
os.path.join(path_to_save, 'Hippocampus_label.nii'), True)
sitk.WriteImage(white_matter_list[0],
os.path.join(path_to_save, 'White_matter_label.nii'), True)
sitk.WriteImage(grey_matter_list[0],
os.path.join(path_to_save, 'Grey_matter_label.nii'), True)
sitk.WriteImage(amygdala_list[0],
os.path.join(path_to_save, 'Amygdala_label.nii'), True)
sitk.WriteImage(thalamus_list[0],
os.path.join(path_to_save, 'Thalamus_label.nii'), True)
#Save an image resampled to show segmentation
sitk.WriteImage(gt_label_list[0],
os.path.join(path_to_save, 'Train_image_1_resampled.nii'),
True)
# sum them up and divide by their number of images to make a probability map
white_matter_map = 0
grey_matter_map = 0
hippocampus_map = 0
amygdala_map = 0
thalamus_map = 0
for i in range(1, len(gt_label_list)):
white_matter_map = sitk.Add(white_matter_map, white_matter_list[i])
grey_matter_map = sitk.Add(grey_matter_map, grey_matter_list[i])
hippocampus_map = sitk.Add(hippocampus_map, hippocampus_list[i])
amygdala_map = sitk.Add(amygdala_map, amygdala_list[i])
thalamus_map = sitk.Add(thalamus_map, thalamus_list[i])
white_matter_map = sitk.Divide(white_matter_map, len(white_matter_list))
grey_matter_map = sitk.Divide(grey_matter_map, len(grey_matter_list))
hippocampus_map = sitk.Divide(hippocampus_map, len(hippocampus_list))
amygdala_map = sitk.Divide(amygdala_map, len(amygdala_list))
thalamus_map = sitk.Divide(thalamus_map, len(thalamus_list))
#atlas = sitk.Divide(sum_images, len(test_resample))
#slice = sitk.GetArrayFromImage(atlas)[90,:,:]
#plt.imshow(slice)
#Register without threshold
path_to_save = '../bin/custom_atlas_result/'
if not os.path.exists(path_to_save):
os.makedirs(path_to_save)
sitk.WriteImage(
grey_matter_map,
os.path.join(path_to_save, 'grey_matter_map_no_threshold.nii'), True)
sitk.WriteImage(
white_matter_map,
os.path.join(path_to_save, 'white_matter_map_no_threshold.nii'), True)
sitk.WriteImage(
hippocampus_map,
os.path.join(path_to_save, 'hippocampus_map_no_threshold.nii'), True)
sitk.WriteImage(
amygdala_map,
os.path.join(path_to_save, 'amygdala_map_no_threshold.nii'), True)
sitk.WriteImage(
thalamus_map,
os.path.join(path_to_save, 'thalamus_map_no_threshold.nii'), True)
#Threhold the 5 different maps to get a binary map
white_matter_map = sitk.BinaryThreshold(white_matter_map, 0.3, 1, 1, 0)
grey_matter_map = sitk.BinaryThreshold(grey_matter_map, 0.6, 2, 2, 0)
hippocampus_map = sitk.BinaryThreshold(hippocampus_map, 0.9, 3, 3, 0)
amygdala_map = sitk.BinaryThreshold(amygdala_map, 1.2, 4, 4, 0)
thalamus_map = sitk.BinaryThreshold(thalamus_map, 1.5, 5, 5, 0)
#Save the images
path_to_save = '../bin/custom_atlas_result/'
if not os.path.exists(path_to_save):
os.makedirs(path_to_save)
sitk.WriteImage(grey_matter_map,
os.path.join(path_to_save, 'grey_matter_map.nii'), True)
sitk.WriteImage(white_matter_map,
os.path.join(path_to_save, 'white_matter_map.nii'), True)
sitk.WriteImage(hippocampus_map,
os.path.join(path_to_save, 'hippocampus_map.nii'), True)
sitk.WriteImage(amygdala_map, os.path.join(path_to_save,
'amygdala_map.nii'), True)
sitk.WriteImage(thalamus_map, os.path.join(path_to_save,
'thalamus_map.nii'), True)
# Load the test labels_native and their transform
path_to_test = '../data/test'
test_gt_label_list = []
test_transform_list = []
for dirpath, subdirs, files in os.walk(path_to_test):
for x in files:
if x.endswith("labels_native.nii.gz"):
test_gt_label_list.append(
sitk.ReadImage(os.path.join(dirpath, x)))
if x.endswith("affine.txt"):
test_transform_list.append(
sitk.ReadTransform(os.path.join(dirpath, x)))
#Resample the labels_native with the transform
test_resample_img = []
for i in range(0, len(test_gt_label_list)):
resample_img = sitk.Resample(test_gt_label_list[i], atlas_t1,
test_transform_list[i],
sitk.sitkNearestNeighbor, 0,
test_gt_label_list[i].GetPixelIDValue())
test_resample_img.append(resample_img)
sitk.WriteImage(test_resample_img[0],
os.path.join(path_to_save, 'Test_data_1_resampled.nii'),
True)
# Save the first test patient labels
# path_to_save = '../bin/temp_test_result/'
# if not os.path.exists(path_to_save):
# os.makedirs(path_to_save)
# sitk.WriteImage(test_resample_img[0], os.path.join(path_to_save, 'FirstPatienFromTestList.nii'), False)
#Compute the dice coeefficent (and the Hausdorff distance)
label_list = [
'White Matter', 'Grey Matter', 'Hippocampus', 'Amygdala', 'Thalamus'
]
map_list = [
white_matter_map, grey_matter_map, hippocampus_map, amygdala_map,
thalamus_map
]
dice_list = []
path_to_save = '../bin/DiceTestResult/'
if not os.path.exists(path_to_save):
os.makedirs(path_to_save)
for i in range(0, 5):
evaluator = eval_.Evaluator(eval_.ConsoleEvaluatorWriter(5))
evaluator.metrics = [
metric.DiceCoefficient(),
metric.HausdorffDistance()
]
evaluator.add_writer(
eval_.CSVEvaluatorWriter(
os.path.join(path_to_save,
'DiceResults_' + label_list[i] + '.csv')))
evaluator.add_label(i + 1, label_list[i])
for j in range(0, len(test_resample_img)):
evaluator.evaluate(test_resample_img[j], map_list[i],
'Patient ' + str(j))
print("END Custom loadAtlas")