Rounded leaf end effect of multileaf collimator on penumbra width and radiation field offset: an analytical and numerical study

Abstract

Background. Penumbra characteristics play a significant role in dose delivery accuracy for radiation therapy. For treatment planning, penumbra width and radiation field offset strongly influence target dose conformity and organ at risk sparing.

Keywords

• multileaf collimator
• rounded leaf end effect
• penumbra width
• radiation field offset
• monte carlo simulation