A dosimetric comparison of the use of equally spaced beam (ESB) beam angle optimization (BAO) and volumetric modulated arc therapy (VMAT) in head and neck cancers treated by intensity modulated radiotherapy

摘要

Previous studies have shown that the beam arrangement had significant influence on plan quality in intensity modulated radiotherapy (IMRT). This study aimed to evaluate the dosimetric performance of beam arrangement methods by employing equally spaced beams (ESB), beam angle optimization (BAO), and volumetric modulated arc therapy (VMAT) in the planning of five types of head and neck (H&N) cancers treated by IMRT.