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用dicompyler软件打开dicom图像，头文件如图所示：
当然也可以直接读取：
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ds = dicom.read_file('h:\data\data\\21662\\2.16.840.1.113662.2.0.105002416.1489146183.701\ct\\ct#0#21662#e7ab693d.dcm')
print ds
>>
(0008, 0008) image type cs: ['original', 'secondary', 'axial']
(0008, 0016) sop class uid ui: ct image storage
(0008, 0018) sop instance uid ui: 2.16.840.1.113662.2.0.105002416.1489146183.501.0
(0008, 0020) study date da: '20170310'
(0008, 0021) series date da: '20170310'
(0008, 0023) content date da: '20060505'
(0008, 0030) study time tm: '1942'
(0008, 0031) series time tm: '1942'
(0008, 0033) content time tm: ''
(0008, 0050) accession number sh: '63071'
(0008, 0060) modality cs: 'ct'
(0008, 0070) manufacturer lo: 'nomos'
(0008, 0090) referring physician's name pn: ''
(0008, 1010) station name sh: ''
(0008, 1090) manufacturer's model name lo: 'corvus 6.4'
(0010, 0010) patient's name pn: '*m32-2^chenjun^^^'
(0010, 0020) patient id lo: '21662'
(0010, 0030) patient's birth date da: ''
(0010, 0040) patient's sex cs: ''
(0018, 0050) slice thickness ds: '4.75'
(0018, 0060) kvp ds: '0'
(0018, 1020) software version(s) lo: 'corvus 6.4'
(0018, 5100) patient position cs: 'hfs'
(0020, 000d) study instance uid ui: 2.16.840.1.113662.2.0.105002416.1489146183.701
(0020, 000e) series instance uid ui: 2.16.840.1.113662.2.0.105002416.1489146183.501
(0020, 0010) study id sh: '63071'
(0020, 0011) series number is: '0'
(0020, 0012) acquisition number is: '0'
(0020, 0013) instance number is: '0'
(0020, 0020) patient orientation cs: ['l', 'p']
(0020, 0032) image position (patient) ds: ['0.73437356948853', '0', '3.25']
(0020, 0037) image orientation (patient) ds: ['1', '0', '0', '0', '1', '0']
(0020, 0052) frame of reference uid ui: 2.16.840.1.113662.2.0.105002416.1489146183.601
(0020, 0060) laterality cs: ''
(0020, 1040) position reference indicator lo: ''
(0020, 1041) slice location ds: '3.25'
(0028, 0002) samples per pixel us: 1
(0028, 0004) photometric interpretation cs: 'monochrome2'
(0028, 0010) rows us: 330
(0028, 0011) columns us: 339
(0028, 0030) pixel spacing ds: ['0.734375', '0.734375']
(0028, 0100) bits allocated us: 16
(0028, 0101) bits stored us: 12
(0028, 0102) high bit us: 11
(0028, 0103) pixel representation us: 0
(0028, 1052) rescale intercept ds: '-1024'
(0028, 1053) rescale slope ds: '1'
(7fe0, 0010) pixel data
发现一套图的第一张和最后一张的slice thickness往往和中间层的值是不同的。
path = 'h:\data\data\\21662\\2.16.840.1.113662.2.0.105002416.1489146183.701\ct\\a.dcm' slices = dicom.read_file(path) spacing = slices.pixelspacing
读取头文件信息方法：
slices.上图头文件中的name列。
这时要注意的是，name大小写不变，去掉空格，去掉符号，比如括号。
举例：
origin = slices.softwareversions print origin >>corvus 6.4
spacing = slices[1].pixelspacing print spacing >>['0.734375', '0.734375']
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