Investigation of the Spatial Resolution of MR-Based Polymer Gel Dosimetry versus Film Densitometry using Dose Modulation Transfer Function oleh Reza Moghadam-Drodkhani, Nader Riyahi-Alam, Abbas Takavar, Kavous Firoznia, Peiman Hadad, Behrooz Rafiee, Morteza Bakhtiary, Zohre Tizmaghz, Ehsan Mohammadi