A tool for intraoperative visualization of registration results

Franklin King, Andras Lasso, Csaba Pinter, Gabor Fichtinger

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


Purpose: Validation of image registration algorithms is frequently accomplished by the visual inspection of the resulting linear or deformable transformation due to the lack of ground truth information. Visualization of transformations produced by image registration algorithms during image-guided interventions allows for a clinician to evaluate the accuracy of the result transformation. Software packages that perform the visualization of transformations exist, but are not part of a clinically usable software application. We present a tool that visualizes both linear and deformable transformations and is integrated in an open-source software application framework suited for intraoperative use and general evaluation of registration algorithms. Methods: A choice of six different modes are available for visualization of a transform. Glyph visualization mode uses oriented and scaled glyphs, such as arrows, to represent the displacement field in 3D whereas glyph slice visualization mode creates arrows that can be seen as a 2D vector field. Grid visualization mode creates deformed grids shown in 3D whereas grid slice visualization mode creates a series of 2D grids. Block visualization mode creates a deformed bounding box of the warped volume. Finally, contour visualization mode creates isosurfaces and isolines that visualize the magnitude of displacement across a volume. The application 3D Slicer was chosen as the platform for the transform visualizer tool. 3D Slicer is a comprehensive open-source application framework developed for medical image computing and used for intra-operative registration. Results: The transform visualizer tool fulfilled the requirements for quick evaluation of intraoperative image registrations. Visualizations were generated in 3D Slicer with little computation time on realistic datasets. It is freely available as an extension for 3D Slicer. Conclusion: A tool for the visualization of displacement fields was created and integrated into 3D Slicer, facilitating the validation of image registration algorithms within a comprehensive application framework suited for intraoperative use.

Original languageEnglish (US)
Title of host publicationProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ISBN (Print)9780819498298
StatePublished - 2014
Externally publishedYes
EventMedical Imaging 2014: Image-Guided Procedures, Robotic Interventions, and Modeling - San Diego, CA, United States
Duration: Feb 18 2014Feb 20 2014


OtherMedical Imaging 2014: Image-Guided Procedures, Robotic Interventions, and Modeling
Country/TerritoryUnited States
CitySan Diego, CA


  • 3D Slicer
  • displacement field
  • image registration
  • open-source
  • visualization

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Radiology Nuclear Medicine and imaging


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