コード例 #1
0
@author: [email protected]
"""
import os, glob
import numpy as np
import matplotlib.pyplot as plt
from nilearn.plotting import plot_stat_map, plot_roi
from nilearn.image import index_img
from fetch_data import fetch_adni_masks, array_to_niis, array_to_nii
from scipy.ndimage import label
from matplotlib import cm
import nibabel as nib
from fetch_data import set_cache_base_dir
from joblib import Parallel, delayed

base_dir = os.path.join(set_cache_base_dir(), 'decomposition')
mask = fetch_adni_masks()['mask_petmr']
mask_shape = nib.load(mask).shape
mask_affine = nib.load(mask).get_affine()
np_files = os.listdir(base_dir)


def extract_region_i(maps, i):
    """ Extract ROIs and plot
    """
    m = maps[i, ...]
    th_value = np.percentile(m, 100. - (100. / 42.))
    data = np.absolute(array_to_nii(m, mask).get_data())
    data[data <= th_value] = 0
    data[data > th_value] = 1
    data_lab = label(data)[0]
コード例 #2
0
import os
import numpy as np
from scipy import stats, linalg
from sklearn.covariance import GraphLassoCV, LedoitWolf, OAS, \
                               ShrunkCovariance

from sklearn.datasets.base import Bunch
from sklearn.base import BaseEstimator, TransformerMixin
from nilearn.input_data import NiftiLabelsMasker, NiftiMapsMasker
import nibabel as nib
from joblib import Parallel, delayed
from nilearn.datasets import fetch_msdl_atlas
from fetch_data import set_cache_base_dir
from embedding import CovEmbedding, vec_to_sym

CACHE_DIR = set_cache_base_dir()


def atlas_rois_to_coords(atlas_name, rois):
    """Returns coords of atlas ROIs
    """

    atlas = fetch_atlas(atlas_name)
    affine = nib.load(atlas).get_affine()
    data = nib.load(atlas).get_data()
    centroids = []
    if len(data.shape) == 4:
        for i in range(data.shape[-1]):
            voxels = np.where(data[..., i] > 0)
            centroid = np.mean(voxels, axis=1)
            dvoxels = data[..., i]