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Improving delivery of segments with small MU in step‐and‐shoot IMRT
Author(s) -
Kuperman V. Y.,
Lam W.C.
Publication year - 2006
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.2174128
Subject(s) - fraction (chemistry) , overshoot (microwave communication) , radiation therapy , delivery system , medical physics , computer science , nuclear medicine , medicine , biomedical engineering , radiology , telecommunications , chemistry , organic chemistry
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.