Optimization and evaluation of multiple gating beam delivery in a synchrotron-based proton beam scanning system using a real-time imaging technique

Increasing numbers of proton therapy centers have adopted the spot-scanning technique. Spot scanning can potentially increase conformity to the target volume and modulates the dose more flexibly than the passive scattering approach. However, in beam scanning, the dose distribution may deteriorate under organ motions, such as respiratory or cardiac motions, during beam delivery [1–4]. Real-time four-dimensional radiotherapy, which includes beam gating [5–7] and beam tracking [8,9], has been realized in photon therapy to mitigate the dosimetric impacts of target motion.

Source: Physica Medica: European Journal of Medical Physics - June 9, 2016 Category: Journals (General) Authors: Takahiro Yamada, Naoki Miyamoto, Taeko Matsuura, Seishin Takao, Yusuke Fujii, Yuka Matsuzaki, Hidenori Koyano, Masumi Umezawa, Hideaki Nihongi, Shinichi Shimizu, Hiroki Shirato, Kikuo Umegaki Tags: Technical note Source Type: research