[英]Reading *.mhd/*.raw format in python
任何人都可以告訴我如何在python中讀取包含.mhd / .raw文件的數據集?
最簡單的方法是使用SimpleITK (MedPy也使用ITK作為.mhd / .raw文件)。 命令
pip install SimpleITK
適用於許多python版本。 對於閱讀.mhd / .raw,您可以使用來自kaggle的代碼
import SimpleITK as sitk
import numpy as np
'''
This funciton reads a '.mhd' file using SimpleITK and return the image array, origin and spacing of the image.
'''
def load_itk(filename):
# Reads the image using SimpleITK
itkimage = sitk.ReadImage(filename)
# Convert the image to a numpy array first and then shuffle the dimensions to get axis in the order z,y,x
ct_scan = sitk.GetArrayFromImage(itkimage)
# Read the origin of the ct_scan, will be used to convert the coordinates from world to voxel and vice versa.
origin = np.array(list(reversed(itkimage.GetOrigin())))
# Read the spacing along each dimension
spacing = np.array(list(reversed(itkimage.GetSpacing())))
return ct_scan, origin, spacing
安裝SimpleITK后,使用skimage可能會更容易
import skimage.io as io
img = io.imread('file.mhd', plugin='simpleitk')
這將為您提供z,y,x排序的numpy數組。
添加上述帖子,您可以從此處下載的CT-Scan .mhd文件開始,並使用以下代碼顯示/保存29個圖像(假設您在當前目錄中同時下載了標題和原始文件):
import SimpleITK as sitk
import matplotlib.pylab as plt
ct_scans = sitk.GetArrayFromImage(sitk.ReadImage("training_001_ct.mhd", sitk.sitkFloat32))
plt.figure(figsize=(20,16))
plt.gray()
plt.subplots_adjust(0,0,1,1,0.01,0.01)
for i in range(ct_scans.shape[0]):
plt.subplot(5,6,i+1), plt.imshow(ct_scans[i]), plt.axis('off')
# use plt.savefig(...) here if you want to save the images as .jpg, e.g.,
plt.show()
您可以嘗試使用MedPy或此mhd_utils腳本
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