2015 Winter Project Week: Multiframe DICOM

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  Projects List

Key Investigators

• Steve Pieper, Isomics
• Andrey Fedorov, BWH
• Michael Onken, Open Connections / DCMTK

Project Description

Objective

• Review progress on DICOM Enhanced Multiframe Object support in DCMTK
  • Segmentation Objects (see Iowa2DICOM)
  • Diffusion Profiles
  • Parametric Maps
  • Ultrasound Objects
  • Derived Objects
• Review the options for a dcm2dcm tool
  • Convert legacy acquisitions to multiframe objects
  • Correctly encode derived objects

Approach, Plan

• Try to build Slicer with latest DCMTK that includes Multiframe Object support
• Try simple programs to exercise API

Progress

• In-depth code and standard review during QIICR breakout session
  • dcmseg (seg==Segmentation), dcmiod (iod==Information Object Definition), dcmfg (fg==Functional Groups) libraries explored
  • prototype converters to/from nrrd for segentation objects
• Identified issues with multiframe MR import in slicer
  • gdcm and dcmtk based readers in ITK cannot currently extract orientation/spacing from per-frame functional groups
  • plan is to look at fixing itkDCMTKImageIO once the version of DCMTK has dcmiod and dcmfg integrated
  • nearer-term a pydicom-based reader could be written for slicer DICOMPlugin

References

• There are several Slicer/ITK bugs related to improper handling of "21st Century DICOM" objects using legacy code designed for older objects.