Dosimetry in 1.5 T MR-Linacs: Monte Carlo determination of magnetic field correction factors and investigation of the air gap effect. - Margaroni, Vasiliki; Pappas, Eleftherios P.; Episkopakis, Anastasios; Pantelis, Evaggelos; Papagiannis, Panagiotis; Marinos, Nikolas; Karaiskos, Pantelis (Medical Physics, 2023)