Relative dosimetry with an MR-linac: Response of ion chambers, diamond, and diode detectors for off-axis, depth dose, and output factor measurements

Purpose The purpose of this study was to acquire beam data for an MR ‐linac, with and without a 1.5 T magnetic field, by using a variety of commercially available detectors to assess their relative response in the magnetic field. The impact of the magnetic field on the measured dose distribution was also assessed. Methods An MR ‐safe 3D scanning water phantom was used to measure output factors, depth dose curves, and off‐axis profiles for...