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 

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

origin = slices.SoftwareVersions
print origin
CORVUS 6.4

spacing = slices[1].PixelSpacing
print spacing
['0.734375', '0.734375']