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Modeling and Validation of a Proton Therapy Couch Top
Estelle Batin1, Austin Faught1, Hyeri Lee1
1The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA.
International Journal of Particle Therapy
|June 23, 2025
Summary
Accurate modeling of the kVue One Proton couch top in treatment planning systems (TPS) is crucial for proton therapy. A 0.1 g/cm³ carbon fiber density model closely matched measured radiological properties, ensuring treatment accuracy.
Area of Science:
- Medical Physics
- Radiation Oncology
- Medical Imaging
Background:
- Accurate modeling of treatment devices is essential for precise proton therapy planning.
- The kVue One Proton couch top's unique density composition requires careful consideration in treatment planning systems (TPS).
Purpose of the Study:
- To develop and validate a model of the kVue One Proton couch top for use in TPS.
- To verify the calculated radiological impact of the couch top model against measured data.
Main Methods:
- Modeled the kVue One Proton couch top in RayStation TPS and MCsquare.
- Evaluated density overrides using range pullback measurements from proton beams.
- Compared model calculations with direct and oblique incidence proton beam measurements.
Main Results:
- The average water equivalent thickness (WET) in uniform areas was 6.46 mm.
- Posterior HU profiles indicated a longitudinally extended ramp area.
- A carbon fiber density of 0.1 g/cm³ for shell and core showed minimal differences (max 1.5 mm) compared to measurements.
Conclusions:
- A 0.1 g/cm³ carbon fiber density model for the kVue One Proton couch top accurately represents its radiological properties.
- The validated model can be reliably used in TPS for proton therapy planning, enhancing treatment accuracy.
