Analyse differences between DICOM filesΒΆ

This examples illustrates how to find the differences between two DICOM files.

Out:

+ (0008, 0005) Specific Character Set              CS: 'ISO_IR 100'

- (0008, 0008) Image Type                          CS: ['DERIVED', 'SECONDARY', 'OTHER']

+ (0008, 0008) Image Type                          CS: ['ORIGINAL', 'PRIMARY', 'AXIAL']

- (0008, 0012) Instance Creation Date              DA: '20040826'

+ (0008, 0012) Instance Creation Date              DA: '20040119'

- (0008, 0013) Instance Creation Time              TM: '185434'

+ (0008, 0013) Instance Creation Time              TM: '072731'

  (0008, 0014) Instance Creator UID                UI: 1.3.6.1.4.1.5962.3

- (0008, 0016) SOP Class UID                       UI: MR Image Storage

+ (0008, 0016) SOP Class UID                       UI: CT Image Storage

- (0008, 0018) SOP Instance UID                    UI: 1.3.6.1.4.1.5962.1.1.4.1.1.20040826185059.5457

+ (0008, 0018) SOP Instance UID                    UI: 1.3.6.1.4.1.5962.1.1.1.1.1.20040119072730.12322

- (0008, 0020) Study Date                          DA: '20040826'

+ (0008, 0020) Study Date                          DA: '20040119'

- (0008, 0021) Series Date                         DA: ''

+ (0008, 0021) Series Date                         DA: '19970430'

- (0008, 0022) Acquisition Date                    DA: ''

+ (0008, 0022) Acquisition Date                    DA: '19970430'

+ (0008, 0023) Content Date                        DA: '19970430'

- (0008, 0030) Study Time                          TM: '185059'

+ (0008, 0030) Study Time                          TM: '072730'

- (0008, 0031) Series Time                         TM: ''

+ (0008, 0031) Series Time                         TM: '112749'

- (0008, 0032) Acquisition Time                    TM: ''

+ (0008, 0032) Acquisition Time                    TM: '112936'

+ (0008, 0033) Content Time                        TM: '113008'

  (0008, 0050) Accession Number                    SH: ''

- (0008, 0060) Modality                            CS: 'MR'

+ (0008, 0060) Modality                            CS: 'CT'

- (0008, 0070) Manufacturer                        LO: 'TOSHIBA_MEC'

+ (0008, 0070) Manufacturer                        LO: 'GE MEDICAL SYSTEMS'

- (0008, 0080) Institution Name                    LO: 'TOSHIBA'

+ (0008, 0080) Institution Name                    LO: 'JFK IMAGING CENTER'

  (0008, 0090) Referring Physician's Name          PN: ''

- (0008, 0201) Timezone Offset From UTC            SH: '-0400'

+ (0008, 0201) Timezone Offset From UTC            SH: '-0500'

- (0008, 1010) Station Name                        SH: '000000000'

+ (0008, 1010) Station Name                        SH: 'CT01_OC0'

+ (0008, 1030) Study Description                   LO: 'e+1'

- (0008, 1060) Name of Physician(s) Reading Study  PN: '----'

- (0008, 1070) Operators' Name                     PN: '----'

- (0008, 1090) Manufacturer's Model Name           LO: 'MRT50H1'

+ (0008, 1090) Manufacturer's Model Name           LO: 'RHAPSODE'

+ (0009, 0010) Private Creator                     LO: 'GEMS_IDEN_01'

+ (0009, 1001) [Full fidelity]                     LO: 'GE_GENESIS_FF'

+ (0009, 1002) [Suite id]                          SH: 'CT01'

+ (0009, 1004) [Product id]                        SH: 'HiSpeed CT/i'

+ (0009, 1027) [Image actual date]                 SL: 862399669

+ (0009, 1030) [Service id]                        SH: ''

+ (0009, 1031) [Mobile location number]            SH: ''

+ (0009, 10e6) [Genesis Version - now]             SH: '05'

+ (0009, 10e7) [Exam Record checksum]              UL: 973283917

+ (0009, 10e9) [Actual series data time stamp]     SL: 862399669

- (0010, 0010) Patient's Name                      PN: 'CompressedSamples^MR1'

+ (0010, 0010) Patient's Name                      PN: 'CompressedSamples^CT1'

- (0010, 0020) Patient ID                          LO: '4MR1'

+ (0010, 0020) Patient ID                          LO: '1CT1'

  (0010, 0030) Patient's Birth Date                DA: ''

- (0010, 0040) Patient's Sex                       CS: 'F'

+ (0010, 0040) Patient's Sex                       CS: 'O'

- (0010, 1020) Patient's Size                      DS: ''

+ (0010, 1010) Patient's Age                       AS: '000Y'

- (0010, 1030) Patient's Weight                    DS: "80.0000"

+ (0010, 1030) Patient's Weight                    DS: "0.000000"

+ (0010, 21b0) Additional Patient History          LT: ''

+ (0011, 0010) Private Creator                     LO: 'GEMS_PATI_01'

+ (0011, 1010) [Patient Status]                    SS: 0

- (0018, 0010) Contrast/Bolus Agent                LO: ''

+ (0018, 0010) Contrast/Bolus Agent                LO: 'ISOVUE300/100'

- (0018, 0020) Scanning Sequence                   CS: 'SE'

- (0018, 0021) Sequence Variant                    CS: 'NONE'

- (0018, 0022) Scan Options                        CS: ''

+ (0018, 0022) Scan Options                        CS: 'HELICAL MODE'

- (0018, 0023) MR Acquisition Type                 CS: '3D'

- (0018, 0050) Slice Thickness                     DS: "0.8000"

+ (0018, 0050) Slice Thickness                     DS: "5.000000"

- (0018, 0080) Repetition Time                     DS: "4000.0000"

- (0018, 0081) Echo Time                           DS: "240.0000"

+ (0018, 0060) KVP                                 DS: "120"

+ (0018, 0088) Spacing Between Slices              DS: "5.000000"

+ (0018, 0090) Data Collection Diameter            DS: "480.000000"

- (0018, 0083) Number of Averages                  DS: "1.0000"

- (0018, 0084) Imaging Frequency                   DS: "63.92433900"

- (0018, 0085) Imaged Nucleus                      SH: 'H'

- (0018, 0086) Echo Number(s)                      IS: "1"

- (0018, 0091) Echo Train Length                   IS: ''

- (0018, 1000) Device Serial Number                LO: '-0000200'

- (0018, 1020) Software Version(s)                 LO: 'V3.51*P25'

+ (0018, 1020) Software Version(s)                 LO: '05'

+ (0018, 1040) Contrast/Bolus Route                LO: 'IV'

+ (0018, 1100) Reconstruction Diameter             DS: "338.671600"

+ (0018, 1110) Distance Source to Detector         DS: "1099.3100585938"

+ (0018, 1111) Distance Source to Patient          DS: "630.000000"

+ (0018, 1120) Gantry/Detector Tilt                DS: "0.000000"

+ (0018, 1130) Table Height                        DS: "133.699997"

+ (0018, 1150) Exposure Time                       IS: "1601"

+ (0018, 1151) X-Ray Tube Current                  IS: "170"

- (0018, 1314) Flip Angle                          DS: "90"

+ (0018, 1152) Exposure                            IS: "170"

+ (0018, 1160) Filter Type                         SH: 'LARGE BOWTIE FIL'

+ (0018, 1190) Focal Spot(s)                       DS: "0.700000"

+ (0018, 1210) Convolution Kernel                  SH: 'STANDARD'

- (0018, 5100) Patient Position                    CS: 'HFS'

+ (0018, 5100) Patient Position                    CS: 'FFS'

+ (0019, 0010) Private Creator                     LO: 'GEMS_ACQU_01'

+ (0019, 1002) [Detector Channel]                  SL: 912

+ (0019, 1003) [Cell number at Theta]              DS: "373.750000"

+ (0019, 1004) [Cell spacing]                      DS: "1.016600"

+ (0019, 100f) [Horiz. Frame of ref.]              DS: "955.799988"

+ (0019, 1011) [Series contrast]                   SS: 2

+ (0019, 1013) [Start number for baseline]         SS: 0

+ (0019, 1014) [End number for baseline]           SS: 0

+ (0019, 1015) [Start number for enhanced scans]   SS: 0

+ (0019, 1016) [End number for enhanced scans]     SS: 0

+ (0019, 1017) [Series plane]                      SS: 2

+ (0019, 1018) [First scan ras]                    LO: 'S'

+ (0019, 1019) [First scan location]               DS: "7.791870"

+ (0019, 101a) [Last scan ras]                     LO: 'I'

+ (0019, 101b) [Last scan loc]                     DS: "-320.197968"

+ (0019, 101e) [Display field of view]             DS: "0.000000"

+ (0019, 1023) [Table Speed [mm/rotation]]         DS: "5.000000"

+ (0019, 1024) [Mid Scan Time [sec]]               DS: "17.784578"

+ (0019, 1025) [Mid scan flag]                     SS: 1

+ (0019, 1026) [Tube Azimuth [degree]]             SL: 0

+ (0019, 1027) [Rotation Speed [msec]]             DS: "1.000000"

+ (0019, 102a) [x-ray On position]                 DS: "178.079926"

+ (0019, 102b) [x-ray Off position]                DS: "3994.299316"

+ (0019, 102c) [Number of triggers]                SL: 10431

+ (0019, 102e) [Angle of first view]               DS: "-718.079956"

+ (0019, 102f) [Trigger frequency]                 DS: "984.000000"

+ (0019, 1039) [SFOV Type]                         SS: 16

+ (0019, 1040) [Stat recon flag]                   SS: 0

+ (0019, 1041) [Compute type]                      SS: 1

+ (0019, 1042) [Segment Number]                    SS: 0

+ (0019, 1043) [Total Segments Required]           SS: 0

+ (0019, 1044) [Interscan delay]                   DS: "1.000000"

+ (0019, 1047) [View compression factor]           SS: 1

+ (0019, 104a) [Total no. of ref channels]         SS: 6

+ (0019, 104b) [Data size for scan data]           SL: 10431

+ (0019, 1052) [Recon post proc. Flag]             SS: 1

+ (0019, 1057) [CT water number]                   SS: -95

+ (0019, 1058) [CT bone number]                    SS: 0

+ (0019, 105e) [Number of channels (1...512)]      SL: 763

+ (0019, 105f) [Increment between channels]        SL: 1

+ (0019, 1060) [Starting view]                     SL: 1969

+ (0019, 1061) [Number of views]                   SL: 1576

+ (0019, 1062) [Increment between views]           SL: 1

+ (0019, 106a) [Dependent on #views processed]     SS: 4

+ (0019, 106b) [Field of view in detector cells]   SS: 852

+ (0019, 1070) [Value of back projection button]   SS: 1

+ (0019, 1071) [Set if fatq estimates were used]   SS: 0

+ (0019, 1072) [Z chan avg over views]             DS: "0.000000"

+ (0019, 1073) [Avg of left ref chans over views]  DS: "0.000000"

+ (0019, 1074) [Max left chan over views]          DS: "0.000000"

+ (0019, 1075) [Avg of right ref chans over views] DS: "0.000000"

+ (0019, 1076) [Max right chan over views]         DS: "0.000000"

+ (0019, 10da) [Reference channel used]            SS: 0

+ (0019, 10db) [Back projector coefficient]        DS: "0.000000"

+ (0019, 10dc) [Primary speed correction used]     SS: 1

+ (0019, 10dd) [Overrange correction used]         SS: 1

+ (0019, 10de) [Dynamic Z alpha value]             DS: "0.000000"

- (0020, 000d) Study Instance UID                  UI: 1.3.6.1.4.1.5962.1.2.4.20040826185059.5457

+ (0020, 000d) Study Instance UID                  UI: 1.3.6.1.4.1.5962.1.2.1.20040119072730.12322

- (0020, 000e) Series Instance UID                 UI: 1.3.6.1.4.1.5962.1.3.4.1.20040826185059.5457

+ (0020, 000e) Series Instance UID                 UI: 1.3.6.1.4.1.5962.1.3.1.1.20040119072730.12322

- (0020, 0010) Study ID                            SH: '4MR1'

+ (0020, 0010) Study ID                            SH: '1CT1'

  (0020, 0011) Series Number                       IS: "1"

- (0020, 0012) Acquisition Number                  IS: "0"

+ (0020, 0012) Acquisition Number                  IS: "2"

  (0020, 0013) Instance Number                     IS: "1"

- (0020, 0032) Image Position (Patient)            DS: ['-83.9063', '-91.2000', '6.6406']

+ (0020, 0032) Image Position (Patient)            DS: ['-158.135803', '-179.035797', '-75.699997']

- (0020, 0037) Image Orientation (Patient)         DS: ['1.0000', '0.0000', '0.0000', '0.0000', '1.0000', '0.0000']

+ (0020, 0037) Image Orientation (Patient)         DS: ['1.000000', '0.000000', '0.000000', '0.000000', '1.000000', '0.000000']

- (0020, 0052) Frame of Reference UID              UI: 1.3.6.1.4.1.5962.1.4.4.1.20040826185059.5457

+ (0020, 0052) Frame of Reference UID              UI: 1.3.6.1.4.1.5962.1.4.1.1.20040119072730.12322

  (0020, 0060) Laterality                          CS: ''

- (0020, 1040) Position Reference Indicator        LO: ''

+ (0020, 1040) Position Reference Indicator        LO: 'SN'

- (0020, 1041) Slice Location                      DS: "0.0000"

+ (0020, 1041) Slice Location                      DS: "-77.2040634155"

  (0020, 4000) Image Comments                      LT: 'Uncompressed'

+ (0021, 0010) Private Creator                     LO: 'GEMS_RELA_01'

+ (0021, 1003) [Series from which Prescribed]      SS: 2

+ (0021, 1005) [Genesis Version - now]             SH: '05'

+ (0021, 1007) [Series Record checksum]            UL: 1605775145

+ (0021, 1015) [Unknown]                           US: 24078

+ (0021, 1016) [Unknown]                           SS: 2

+ (0021, 1018) [Genesis version - Now]             SH: '05'

+ (0021, 1019) [Acq recon record checksum]         UL: 750675506

+ (0021, 1037) [Screen Format]                     SS: 16

+ (0021, 104a) [Anatomical reference for scout]    LO: ''

+ (0021, 1090) [Tube focal spot position]          SS: 7400

+ (0021, 1091) [Biopsy position]                   SS: 0

+ (0021, 1092) [Biopsy T location]                 FL: 0.0

+ (0021, 1093) [Biopsy ref location]               FL: 0.0

+ (0023, 0010) Private Creator                     LO: 'GEMS_STDY_01'

+ (0023, 1070) [Start time(secs) in first axial]   FD: 862399761.111079

+ (0023, 1074) [No. of updates to header]          SL: 1

+ (0023, 107d) [Indicates study has complete info  SS: 0

+ (0025, 0010) Private Creator                     LO: 'GEMS_SERS_01'

+ (0025, 1006) [Last pulse sequence used]          SS: 0

+ (0025, 1007) [Images in Series]                  SL: 44

+ (0025, 1010) [Landmark Counter]                  SL: 0

+ (0025, 1011) [Number of Acquisitions]            SS: 0

+ (0025, 1017) [Series Complete Flag]              SL: 0

+ (0025, 1018) [Number of images archived]         SL: 0

+ (0025, 1019) [Last image number used]            SL: 4

+ (0025, 101a) [Primary Receiver Suite and Host]   SH: ''

+ (0027, 0010) Private Creator                     LO: 'GEMS_IMAG_01'

+ (0027, 1006) [Image archive flag]                SL: 1

+ (0027, 1010) [Scout Type]                        SS: 0

+ (0027, 101c) [Vma mamp]                          SL: 150

+ (0027, 101d) [Vma phase]                         SS: 1

+ (0027, 101e) [Vma mod]                           SL: 24

+ (0027, 101f) [Vma clip]                          SL: 129

+ (0027, 1020) [Smart scan ON/OFF flag]            SS: 1

+ (0027, 1030) [Foreign Image Revision]            SH: ''

+ (0027, 1035) [Plane Type]                        SS: 2

+ (0027, 1040) [RAS letter of image location]      SH: 'I'

+ (0027, 1041) [Image location]                    FL: -77.20406341552734

+ (0027, 1042) [Center R coord of plane image]     FL: -11.199999809265137

+ (0027, 1043) [Center A coord of plane image]     FL: 9.699999809265137

+ (0027, 1044) [Center S coord of plane image]     FL: -75.69999694824219

+ (0027, 1045) [Normal R coord]                    FL: 0.0

+ (0027, 1046) [Normal A coord]                    FL: 0.0

+ (0027, 1047) [Normal S coord]                    FL: -1.0

+ (0027, 1048) [R Coord of Top Right Corner]       FL: -180.53579711914062

+ (0027, 1049) [A Coord of Top Right Corner]       FL: 179.03579711914062

+ (0027, 104a) [S Coord of Top Right Corner]       FL: -75.69999694824219

+ (0027, 104b) [R Coord of Bottom Right Corner]    FL: -180.53579711914062

+ (0027, 104c) [A Coord of Bottom Right Corner]    FL: -159.63580322265625

+ (0027, 104d) [S Coord of Bottom Right Corner]    FL: -75.69999694824219

+ (0027, 1050) [Scan Start Location]               FL: -63.19999694824219

+ (0027, 1051) [Scan End Location]                 FL: -116.20304870605469

+ (0027, 1052) [RAS letter for side of image]      SH: 'L'

+ (0027, 1053) [RAS letter for anterior/posterior] SH: 'A'

+ (0027, 1054) [RAS letter for scout start loc]    SH: 'I'

+ (0027, 1055) [RAS letter for scout end loc]      SH: 'I'

  (0028, 0002) Samples per Pixel                   US: 1

  (0028, 0004) Photometric Interpretation          CS: 'MONOCHROME2'

- (0028, 0010) Rows                                US: 64

+ (0028, 0010) Rows                                US: 128

- (0028, 0011) Columns                             US: 64

+ (0028, 0011) Columns                             US: 128

- (0028, 0030) Pixel Spacing                       DS: ['0.3125', '0.3125']

+ (0028, 0030) Pixel Spacing                       DS: ['0.661468', '0.661468']

  (0028, 0100) Bits Allocated                      US: 16

  (0028, 0101) Bits Stored                         US: 16

  (0028, 0102) High Bit                            US: 15

  (0028, 0103) Pixel Representation                US: 1

- (0028, 0106) Smallest Image Pixel Value          SS: 0

- (0028, 0107) Largest Image Pixel Value           SS: 4000

+ (0028, 0120) Pixel Padding Value                 SS: -2000

+ (0028, 1052) Rescale Intercept                   DS: "-1024"

+ (0028, 1053) Rescale Slope                       DS: "1"

+ (0029, 0010) Private Creator                     LO: 'GEMS_IMPS_01'

+ (0029, 1004) [Lower range of Pixels1]            SL: 0

+ (0029, 1005) [Lower range of Pixels1]            DS: "0.000000"

+ (0029, 1006) [Lower range of Pixels1]            DS: "0.000000"

+ (0029, 1007) [Lower range of Pixels1]            SL: 87

+ (0029, 1008) [Lower range of Pixels1]            SH: ''

+ (0029, 1009) [Lower range of Pixels1]            SH: ''

+ (0029, 100a) [Lower range of Pixels1]            SS: 764

+ (0029, 1026) [Version of the hdr struct]         SS: 2

+ (0029, 1034) [Advantage comp. Overflow]          SL: 0

+ (0029, 1035) [Advantage comp. Underflow]         SL: 0

+ (0043, 0010) Private Creator                     LO: 'GEMS_PARM_01'

- (0028, 1050) Window Center                       DS: "600"

+ (0043, 1010) [Window value]                      US: 400

- (0028, 1051) Window Width                        DS: "1600"

+ (0043, 1011) [Total input views]                 US: 10431

+ (0043, 1012) [X-ray chain]                       SS: [14, 2, 3]

+ (0043, 1013) [Decon kernel parameters]           SS: [107, 21, 4, 2, 20]

+ (0043, 1014) [Calibration parameters]            SS: [4, 4, 5]

+ (0043, 1015) [Total output views]                SS: 10431

+ (0043, 1016) [Number of overranges]              SS: 0

+ (0043, 1017) [IBH image scale factors]           DS: "0.095000"

+ (0043, 1018) [BBH coefficients]                  DS: ['0.085000', '1.102000', '0.095000']

+ (0043, 1019) [Number of BBH chains to blend]     SS: 350

+ (0043, 101a) [Starting channel number]           SL: 7

+ (0043, 101b) [Ppscan parameters]                 SS: [0, 0, 0, 0, 0]

+ (0043, 101c) [GE image integrity]                SS: 0

+ (0043, 101d) [Level value]                       SS: 40

+ (0043, 101e) [Delta Start Time [msec]]           DS: "2.000000"

+ (0043, 101f) [Max overranges in a view]          SL: 0

+ (0043, 1020) [Avg overranges all views]          DS: "0.000000"

+ (0043, 1021) [Corrected after glow terms]        SS: 0

+ (0043, 1025) [Reference channels]                SS: [1, 2, 3, 748, 749, 750]

+ (0043, 1026) [No views ref chans blocked]        US: [0, 1, 1, 0, 0, 0]

+ (0043, 1027) [Scan Pitch Ratio]                  SH: '/1.0:1'

+ (0043, 1028) [Unique image iden]                 OB: Array of 80 elements

+ (0043, 1029) [Histogram tables]                  OB: Array of 2068 elements

+ (0043, 102a) [User defined data]                 OB: Array of 40 elements

+ (0043, 102b) [Private Scan Options]              SS: [4, 4, 0, 0]

+ (0043, 1031) [Recon Center Coordinates]          DS: ['-11.200000', '9.700000']

+ (0043, 1040) [Trigger on position]               FL: 178.07992553710938

+ (0043, 1041) [Degree of rotation]                FL: 3816.219482421875

+ (0043, 1042) [DAS trigger source]                SL: 0

+ (0043, 1043) [DAS fpa gain]                      SL: 0

+ (0043, 1044) [DAS output source]                 SL: 1

+ (0043, 1045) [DAS ad input]                      SL: 1

+ (0043, 1046) [DAS cal mode]                      SL: 3

+ (0043, 1047) [DAS cal frequency]                 SL: -1

+ (0043, 1048) [DAS reg xm]                        SL: 1

+ (0043, 1049) [DAS auto zero]                     SL: 0

+ (0043, 104a) [Starting channel of view]          SS: 1

+ (0043, 104b) [DAS xm pattern]                    SL: 0

+ (0043, 104c) [TGGC trigger mode]                 SS: 0

+ (0043, 104d) [Start scan to X-ray on delay]      FL: 0.0

+ (0043, 104e) [Duration of X-ray on]              FL: 10.60060977935791

- (7fe0, 0010) Pixel Data                          OW: Array of 8192 elements

+ (7fe0, 0010) Pixel Data                          OW: Array of 32768 elements

  (fffc, fffc) Data Set Trailing Padding           OB: Array of 126 elements

# authors : Guillaume Lemaitre <g.lemaitre58@gmail.com>
# license : MIT

import difflib

import pydicom
from pydicom.data import get_testdata_files

print(__doc__)

filename_mr = get_testdata_files('MR_small.dcm')[0]
filename_ct = get_testdata_files('CT_small.dcm')[0]

datasets = tuple([pydicom.dcmread(filename, force=True)
                  for filename in (filename_mr, filename_ct)])

# difflib compare functions require a list of lines, each terminated with
# newline character massage the string representation of each dicom dataset
# into this form:
rep = []
for dataset in datasets:
    lines = str(dataset).split("\n")
    lines = [line + "\n" for line in lines]  # add the newline to end
    rep.append(lines)


diff = difflib.Differ()
for line in diff.compare(rep[0], rep[1]):
    if line[0] != "?":
        print(line)

Total running time of the script: ( 0 minutes 0.156 seconds)

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