Commissioning Compensator-Based IMRT with a Flattening Filter Free Beam

摘要：

　　This paper describes the process of commissioning a flattening filter free 6MV (6XFFF) beam with brass compensators.The beam model limitations due to the beam hardening and scatter in the compensator are discussed.Measured and calculated inhomogeneity corrections for air and 0.27 g/cm3 wood are compared.The use of diode arrays for QA of the 6XFFF beam with compensators requires planspecific corrections based on the brass thickness along the ray.With such corrections,adequate gamma analysis passing rates are achieved with one planar and two 3D diode array dosimeters.This analysis was based primarily on the plans developed from the structure sets and objectives described in the AAPM TG-119 report.Our dosimetric results compare favorably to that publication.

关键词： Flattening Filter Free Compensator Diode array Inhomogeneity correction Diode energy response

作者: Joshua Robinson Vladimir Feygelman Daniel Opp Geoffrey Zhang Ken Cashon Jakub Kozelka Dylan Hunt Luke Walker Sarah Hoffe Ravi Shridhar

作者单位: Department of Physics, University of South Florida, Tampa, Florida, USA; Division of Radiation Oncol Division of Radiation Oncology, Moffitt Cancer Center, Tampa, Florida, USA Department of Physics, University of South Florida, Tampa, Florida, USA decimal Inc., Sanford, Florida, USA Sun Nuclear Corp., Melbourne, Florida, USA

会议类型: 国际会议

会议名称: World Congress on Medical Physics and Biomedical Engineering (2012年医学物理及生物医学工程国际会议(IFMBE))

会议地点: 北京

会议语种:英文

页码: 1895-1898

在线出版日期: 2012-05-26（万方平台首次上网日期，不代表论文的发表时间）