John M. Cameron,Alexander V. Klyachko,Keith A. Solberg,Steven E. Vigdor
申请号：
US14248499
公开号：
US09739892B2
申请日:
2014.04.09
申请国别(地区):
US
年份:
2017
代理人:
摘要：
A gas scintillation detector is designed to provide in-beam absolute dose monitoring for ion beam radiotherapy treatments employing spot or raster beam scanning, especially with microsecond-scale beam pulses. Detection of prompt primary scintillation light emitted by gas molecules excited by beam passage provides electronic signals that can be processed to yield output data proportional to delivered dose up to high dose rates, and that appear quickly enough to provide feedback to influence real-time beam intensity adjustments for subsequent steps in the beam scan. When the scintillation light is collected in multiple photo-detectors, the invention is furthermore capable of measuring spot beam position with spatial resolutions of order one millimeter.
