Speaker
Description
Particle therapy gantries are essential for modern radiation therapy, requiring precise beam spot control to ensure dose delivery accuracy during multi-angle irradiation. However, gantry rotation alters the relative positions of optical components, affecting beam spot characteristics. Current solutions each offer distinct advantages under different system conditions. A unified theoretical analysis is imperative to reconcile these approaches, elucidate their intrinsic connections, and ultimately enrich the design paradigm for rotation-invariant systems.
This study not only integrates existing approaches but also introduced A novel constraint (Mx=My) for the gantry transfer matrix. It ensures beam spot invariance without needing symmetric input beams or extra rotators. This constraint offers a versatile and cost-effective solution for gantry design. Simulations validate its effectiveness in maintaining stable beam spots across all rotation angles, even with asymmetric emittances. Importantly, the proposed framework integrates seamlessly with existing techniques, such as sigma matching, thereby enhancing the overall robustness and adaptability of gantry systems.
This work proposes a unified design framework for rotation-invariant beamline systems in particle therapy, providing theoretical foundations for future system optimization.
