4D dosimetry and its applications to pre-treatment quality control and real-time in vivo dosimetry of VMAT treatments

摘要

In this study, a 4D dosimetry concept was developed. This concept included a method for calculation of 3D reference absorbed dose matrices at every control point of the delivery using a clinical treatment planning system (TPS). Further, the gamma evaluation method was extended to incorporate the 4th dimension of the TPS calculated dose distributions. The applications of the 4D dosimetry concept on pretreatment quality control and real-time in vivo dosimetry were investigated.