https://itk.org/Wiki/ITK/MetaIO/Documentation
https://blog.youkuaiyun.com/zyc2017/article/details/84030903
ObjectType = Image #对象类型
NDims = 3 #3维
BinaryData = True #二进制数据
BinaryDataByteOrderMSB = False #二进制数据字节顺序
CompressedData = False #数据压缩
TransformMatrix = 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 #旋转矩阵x,y,z
Offset = -250.009995 -250.009995 -240.750000 #偏移量
CenterOfRotation = 0 0 0 #旋转中心
ElementSpacing = 0.976600 0.976600 3.000000 #像素间隔 x,y,z
DimSize = 512 512 127 #数据的大小 x,y,z
ElementType = MET_UCHAR #像素类型
ElementDataFile = roi_1.2.276.0.7230010.3.1.4.1629419821.6504.1559787202.955_Brain.raw #文件名称