Feasibility of stereotactic radiotherapy using a 1.5 T MR-linac: Multi-fraction treatment of pelvic lymph node oligometastases

Online adaptive radiotherapy using the 1.5 Tesla MR-linac is feasible for SBRT (5 x 7 Gy) of pelvic lymph node oligometastases. The workflow allows full online planning based on daily anatomy. Session duration is less than 60 min. Quality assurance tests, including independent 3D dose calculations and film measurements were passed. (C) 2019 The Authors. Published by Elsevier B.V.