Experience of Radiation Theapy Using Non-Coplanar Fields Angles VMAT in the Implementation of Radiotherapy for Prostata Cancer Patients

Abstract

Purpose: This study explored the non-coplanar VMAT planning technique for the pelvic area and its ability to achieve targeted clinical doses to increase the likelihood of tumor control for prostate cancer patients while reducing radiation exposure to the OAR. Materials and methods: The study included 12 patients with prostate cancer of low, intermediate and high risk of progression according to NCCN. Planning for six patients was performed using the coplanar VMAT technique. For the second group, also of 6 patients, non-coplanar VMATs were used, where out of two full arches only one full arch (FULLARC 1), gantry 181°-179° CW, couch 0 was used. Results: Implemented plans in the study method showed that the use of non-coplanar VMAT therapy fields can significantly reduce doses in OAR, in particular, the reduction in the average dose to the femoral heads was 46.6 %. Conclusion: This study has demonstrated the potential for a non-standard approach to patient treatment with non-coplanar VMAT treatment planning.