2024.12.03 Weekly Meeting

[jcfr (Jean Christophe Fillion Robin)]

Meeting Notes

Curved Planar Reformation (CPR)

• VTK-Centric Approach:

  • @Thibault_Pelletier explained that the earlier VTK-centric approach implemented in MR-10766 was overly complex, leading to its abandonment.
  • He provided further details on the polydata-based approach currently under development by @LucasGandel .

• Activiz Blog Post:

  • @LucasGandel published a blog post about the Activiz release, highlighting a new mapper (vtkOpenGLSurfaceProbeVolumeMapper) implementing a polydata-based approach. See LucasGandelKitware/vtk@probe-volume-mapper
  • Read the post: Activiz 9.4 - Curved Planar Reformation.

• Coordinate ID Concept:

  • As noted in previous discussions, adding a “coordinate ID” could enable filtering nodes for display in specific views:
    • FrameOfReferenceID (or CoordinateSystemID) was added to vtkMRMLAbstractViewNode.
    • If specified, the view displays only MRML data nodes with matching FrameOfReferenceID.

• Commonality with Resectograms:

  • This approach aligns with techniques used in Slicer-Liver’s resectograms project. Learn more: Slicer-Liver Project.

• New View for “Straighten” Functionality:

  • @Thibault_Pelletier suggested creating a new node derived from vtkMRMLAbstractViewNode with a dedicated displayable manager using a vtkMRMLCameraWidget.
  • Meshes (models) could be displayed with a dedicated overlay renderer.
  

Discussions after SOFA Week for Slicer-SOFA

• Slicer-SOFA as a Platform for SOFA Plugins:

  • Slicer-SOFA has been developed with Slicer users in mind, but SOFA users often create their own plugins that they may want to use within Slicer.
  • Discussed enabling developers to integrate their SOFA plugins into Slicer effectively.

• Proposed Solution:

  • Wrap SOFA plugins as Slicer extensions that leverage the SOFA libraries deployed by Slicer-SOFA.
  • Slicer’s existing CMake infrastructure can facilitate finding the required libraries for SOFA plugins.

Discussion about DynamicModeler

• Extrusion Tool Enhancements:

  • @mau_igna_06 will submit a pull request to add a combobox for fixed or scaling factor mode when using line or point markups. Plane behavior will remain unchanged.
  • Discussed potential for rotational extrusion and the utility of vtkRuledSurfaceFilter.

• DynamicModeler Sources Tool:

  • Proposed adding tools to create shapes such as spheres, cubes, cylinders, and text as dynamic sources.

• Downsampling Models and Adding Sources:

  • Suggested a DynamicModeler tool to downsample points on a model and place a source model (e.g., using vtkGlyph3D) at each point.
  • Downsampling techniques could include:
    • Uniform remeshing
    • vtkPoissonDiskSampler
    • vtkMaskPoints
    • Example: SpikeFran Visualization.

• Dynamic Meshes and Markups:

  • For meshes with dynamic shapes and positions/orientations, implementing this functionality as a custom “markups” may be preferable.
  • Consider exploring existing features in the SlicerExtraMarkups extension.