Beam scanning system for a clinical pi-meson beam
Beam scanning system for a clinical pi-meson beam
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用于临床 pi 介子束的光束扫描系统
DOI：
10.1063/1.1138940
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发表时间：
1986
期刊：
影响因子：
--
通讯作者：
L. Skarsgard
中科院分区：
文献类型：
--
作者：
G. Lam;R. Harrison;R. Kornelsen;L. Skarsgard
为TRIUMF质子治疗装置建立了适用于癌症放射治疗的大剂量均匀射野的束流输送系统，该系统采用三维离散阶跃束流扫描。躺在沙发上的病人以栅格方式相对于铅笔束进行横向扫描。在每个点，通过使用距离移位器的距离调制来提供深度剂量分布。扫描床和距离移位器的操作通过使用来自束强度积分系统的束监视脉冲来同步。因此，该系统的通用性足以处理高度不规则形状的处理体积，并且不受加速器输出的波动的影响。
A beam delivery system for large uniform dose fields suitable for cancer radiotherapy has been constructed for the TRIUMF pion treatment facility using discrete step beam scanning in three dimensions. The patient on a couch is scanned laterally relative to a pencil beam in a raster fashion. At each spot, the depth dose profile is delivered by range modulations using a range shifter. The operations of the scanning couch and range shifter are synchronized by the use of beam monitor pulses from a beam intensity integrating system. The system is hence versatile enough to handle treatment volume of highly irregular shape and yet is immune to fluctuations in accelerator output.