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Technical note: A collision prediction tool using Blender.

Gian Guyer1, Silvan Mueller1, Yanick Wyss1

  • 1Division of Medical Radiation Physics and Department of Radiation Oncology, Inselspital, Bern University Hospital, and University of Bern, Switzerland.

Journal of Applied Clinical Medical Physics
|October 2, 2023
PubMed
Summary
This summary is machine-generated.

A new collision prediction tool for C-arm linear accelerators helps ensure patient safety during non-coplanar radiotherapy. This free Blender-based software accurately identifies potential collisions, creating collision-free zones for treatment planning.

Keywords:
collision predictionnon-coplanar radiotherapytreatment planning

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Area of Science:

  • Medical Physics
  • Radiation Oncology
  • Medical Imaging

Background:

  • Non-coplanar radiotherapy on C-arm linear accelerators offers potential dose reduction to organs-at-risk compared to coplanar techniques.
  • Ensuring patient safety during these advanced treatments requires accurate prediction of collisions between the gantry, table, and patient.

Purpose of the Study:

  • To develop and validate a freely available collision prediction tool for C-arm linear accelerator treatment planning.
  • To enable the calculation of collision-free zones and verification of treatment plans.

Main Methods:

  • A geometric model of a C-arm linear accelerator and patient models were created in Blender.
  • The tool was validated using a TrueBeam system, comparing manual collision checks with simulated predictions at 2° resolution.
  • A graphical user interface was developed for user-friendly input and visualization of gantry and table movement.

Main Results:

  • The collision prediction tool achieved a 100% true positive rate and an 89% true negative rate in validation.
  • The tool successfully generated maps of collision-free zones and tested treatment plans for potential collisions.
  • Visualizations of gantry and table movement were provided for treatment plan analysis.

Conclusions:

  • A validated, free collision prediction tool using Blender has been successfully developed for C-arm linear accelerators.
  • This tool enhances patient safety in non-coplanar radiotherapy by accurately predicting and visualizing potential collisions.
  • The software facilitates the creation of collision-free treatment plans and improves the safety of advanced radiotherapy techniques.