Motion Compensation with Scanned Ion Beams
Author Information
Author(s): Sven Oliver Grözinger, Christoph Bert, Thomas Haberer, Gerhard Kraft, Eike Rietzel
Primary Institution: Gesellschaft für Schwerionenforschung (GSI)
Hypothesis
Can motion compensation with scanned particle beams be achieved with high precision?
Conclusion
Motion compensation with scanned particle beams is technically feasible with high precision.
Supporting Evidence
- Lateral motion compensation performance was better than 1% for a homogeneous dose distribution.
- The accuracy of longitudinal range compensation was well below 1 mm.
- Homogeneity indices for dose distributions measured under stationary, moving, and motion compensated conditions were 0.969, 0.655, and 0.963 respectively.
Takeaway
This study shows that we can adjust the radiation beam to follow moving tumors very accurately, which helps to avoid damaging healthy tissue.
Methodology
The study involved simulating target motion and using a three-axes positioning table to adapt beam positions in real time.
Limitations
The study primarily focused on technical feasibility and did not address clinical implementation challenges.
Participant Demographics
Approximately 400 patients treated with scanned carbon ion beams.
Digital Object Identifier (DOI)
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