2012 Winter Project Week DICOM RT Breakout

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Objective

• Identify and priorize tasks regarding the integration of DICOM RT related functions in Slicer4
• Make decisions upon major design questions
• Plan further steps

Time and Place

• 3PM-5PM, Tuesday, January 10, 2012
• Amethyst room, Marriott, Salt Lake City, UT

Agenda

• 3:10-3:20, Welcome, Goal of the meeting, Agenda, Taking notes in wiki
• 3:20-3:35, Introduction of SlicerRT project (under SparKit) goals, design options - Csaba Pinter (slides)
• 3:35-3:50, Overview of DICOM-RT - Greg Sharp (slides)
• 3:50-4:15, Slicer annotations for Quntitative Imaging Network (DICOM SR, AIM) - Andrey Fedorov (slides)
• ?:??-?:??, Introduction of ... - Anyone who is interested
• ?:??-4:40, Discussion about the common needs, priorities, the best approaches and design options
• 4:40-5:00, Decisions, Action plan

Organizational Topics

• How can we organize ourselves to minimize duplicated effort
  • How to share code with Slicer and non-Slicer projects (plastimatch)
• Who is 'on the hook' to deliver functionality related to DICOM?
  • What is funding the effort?
  • What is the use case and deliverable?
  • What toolkit will be used?
  • What synergy is there with other efforts?
• Are there specific issues that we can work out this week as a team?

Design questions

• How to add handling of the new entities in CTK?
  • Notifyable loadable module?
• How to represent the data in Slicer? (which MRML nodes to use)
• Conversion issues between the representations
  • Contour → Volume/Surface
  • Manual or automatic
• Are RT specific modules expanded during import or just on load in the treeview?

Plan

• Telecon with DCMTK group, CTK group
  • DCMTK - next week (Jan 14-) - to be organized by the SparKit group
    • What can go reasonably in DCMTK should go there as lowest level toolkit
    • Middle level addition for interpreting raw data
  • CTK
    • Get relevant tags from RT/SR and insert them in database
• Slicer extension
  • Hidden loadable module
  • Lower level register-observe method
  • Storage nodes, IO factory
  • Solve binding of the annotations to a volume
• Representation
  • Contours
    • Store contour series - vtkMRMLAnnotation...Node: PolyLine
    • Hierarchy: Structure Set -> Structure -> Contour
      • Hierarchy nodes that represent a relationship
      • Transform graph: tree, Grouping: tree/graph?

TBD

• Image representation, multiple structures for a voxel
• DICOM Metadata format in Slicer
  • Keep it in the file?
    • We have the UID and the database -> we can get the file
    • Caching may be implemented in CTK
    • The file can be kept in memory
    • Pointer in the vtkMRMLNode to a DCMTK object