Patrick M. Hill,Thomas R. Mackie,Jihad H. Al-Sadah
申请号：
US12439440
公开号：
US08269196B2
申请日:
2008.02.27
申请国别(地区):
US
年份:
2012
代理人:
摘要：
A system for modulating a fan beam for radiation treatment employs shutters that may move rapidly into and out of different beamlets of a fan beam, the shutters having a systematic weighting so that a limited number of shutters may obtain a far greater number of regularly spaced energy reductions.
