我正在处理原始格式的CT扫描医学图像。它基本上是一个由体素组成的三维矩阵(512 * 512 * 切片数)。我想将文件的每个切片提取到单独的文件中。
import numpy as np
import matplotlib.pyplot as plt
# reading the raw image into a string. The image files can be found at:
# https://grand-challenge.org/site/anode09/details/
f = open('test01.raw', 'rb')
img_str = f.read()
# converting to a uint16 numpy array
img_arr = np.fromstring(img_str, np.uint16)
# get the first image and plot it
im1 = img_arr[0:512*512]
im1 = np.reshape(im1, (512, 512))
plt.imshow(im1, cmap=plt.cm.gray_r)
plt.show()
结果看起来肯定像是胸部CT扫描,但图像的质地很奇怪,好像像素错位了一样。
相关信息可能在关联的.mhd信息文件中,但我不确定应该在哪里查找:
ObjectType = Image
NDims = 3
BinaryData = True
BinaryDataByteOrderMSB = False
CompressedData = False
TransformMatrix = 1 0 0 0 1 0 0 0 1
Offset = 0 0 0
CenterOfRotation = 0 0 0
AnatomicalOrientation = RPI
ElementSpacing = 0.697266 0.697266 0.7
DimSize = 512 512 459
ElementType = MET_SHORT
ElementDataFile = test01.raw