82 Output ratios measurements in stereotactic radiosurgery using cones with a 6 MV FFF beam: comparison between 8 detectors

Introduction. The purpose of this work is to assess 8 detectors performances for output ratio (OR) determination, in clinical 6 MV flattening filter free (FFF) beam of the Truebeam STx Novalis stereotactic radiosurgery linear accelerator for cone irradiation using EBT3 radiochromic films (Ashland) as reference 1 Morales JE. et al. A comparison of surface doses for very small field size x-ray beams: Monte Carlo calculations and radiochromic film...