Low dose out-of-field radiotherapy, part 1: Measurement of scattered doses

摘要

Purpose. - To measure out-of-field doses in a phantom model to better quantify this radiation. Material and methods.-The individual contribution of photons and neutrons to the total out-of-field dose for 6 MV and 20 MV photons at open beam were measured in a purpose-designed water phantom. Radiation doses were measured at seven separate points (P1-P7) in the phantom with thermoluminescent detectors CUD 100, 600, and 700) and GAFchromic (TM) EBT films.