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Canon DICOM support #388

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neurolabusc opened this issue Mar 20, 2020 · 1 comment
Closed

Canon DICOM support #388

neurolabusc opened this issue Mar 20, 2020 · 1 comment

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@neurolabusc
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Clément Debacker has provided a dataset from a Canon Galan 3T. Since Canon acquired Toshiba Medical Systems, the data varies slightly from the Toshiba Galan 3T.

  • Manufacturer (0008,0070) is now CANON_MEC.
  • Storage of DWI values has changed. The recommended tag is now used for DiffusionBValue (0018,9087).
  • Bizarrely, The Diffusion Directionality is now reported as text in the ImageComments tag (0020,4000), e.g. b=1500(0.000,0.445,0.895).

A patch for dcm2niix now supports these features.

  • New BIDS JSON Manufacturer value Canon
  • The gradient vector directions are not validated, and should be treated as experimental. Clément Debacker has offered to provide a public validation dataset (as he did for Toshiba) once the quarantine is lifted.
neurolabusc added a commit that referenced this issue Mar 20, 2020
@neurolabusc
Experimental Canon DICOM support (#388)
c8de63a
yarikoptic added a commit to neurodebian/dcm2niix that referenced this issue May 6, 2020
@yarikoptic
Merge tag 'v1.0.20200331' into debian
c51c61e 
* tag 'v1.0.20200331': (52 commits)
  Update submodules
  Update dcm_qa submodule.
  UIH 3D sequence quirk
  New release, EstimatedTotalReadoutTime/EstimatedEffectiveEchoSpacing (rordenlab#377)
  Philips TotalReadoutTime (rordenlab#377)
  Cleanup
  Experimental Canon DICOM support (rordenlab#388)
  Experimental solution for issue 384 (rordenlab#384)
  Detect catastrophic anonymization (rordenlab#383)
  Only report "multiple inversion times" if 0018,9079 values differ (e.g. Bangalore data in https://github.com/neurolabusc/dcm_qa_philips)
  Consistent echo naming (rordenlab#381)
  Philips partial Fourier (rordenlab#377)
  Support InversionTImes (0018,9079) tag (rordenlab#380)
  Philips effective echo spacing formula ambiguous (rordenlab#377)
  TR for Philips 3D EPI (rordenlab#369)
  Citation (rordenlab#102)
  GE PET with variable slice intensity (rordenlab#374)
  Estimate Philips EffectiveEchoSpacing (nipreps/sdcflows#5)
  GE slice interpolation (rordenlab#373)
  3D EPI TR (rordenlab#369) 3D phase (rordenlab#371) Enhanced ordering (rordenlab#372 (comment))
  ...
@malaterre
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malaterre commented Sep 5, 2023 •
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In case this help for validation: an alternative way to extract diffusion info is gdcmdump --pmtf.

     --pmtf           print PMTF INFORMATION DATA sub-sequences (0029,01,PMTF INFORMATION DATA).
                      or TOSHIBA_MEC_MR3 sub-sequences (0029,01,TOSHIBA_MEC_MR3).
                      or CANON_MEC_MR3 sub-sequences (0029,01,CANON_MEC_MR3).

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@malaterre @neurolabusc