Kuperman V Y, Lam W C
James A Haley Veterans Hospital, Tampa, FL 33612, USA.
Med Phys. 2006 Apr;33(4):1067-73. doi: 10.1118/1.2174128.
The purpose of this study is to describe four new delivery schemes for intensity-modulated radiation therapy (IMRT). In the first two schemes the order in which segments are delivered is varied from fraction to fraction. The last two delivery schemes employ fixed order of segments. The obtained results indicate that the suggested approaches can significantly reduce the so-called "overshoot" and "undershoot" phenomena and the associated discrepancies between planned and delivered monitor units.
本研究的目的是描述四种用于调强放射治疗（IMRT）的新的射野分段照射方案。在前两种方案中，各射野分段的照射顺序在不同分次之间是变化的。后两种照射方案采用固定的射野分段顺序。所得结果表明，所建议的方法可显著减少所谓的“超调”和“欠调”现象以及计划与实际照射的监测单位之间的相关差异。
