Geometric distortion assessment in 3T MR images used for treatment planning in cranial Stereotactic Radiosurgery and Radiotherapy. - Theocharis, Stefanos; Pappas, Eleftherios P.; Seimenis, Ioannis; Kouris, Panagiotis; Dellios, Dimitrios; Kollias, Georgios; Karaiskos, Pantelis (PLoS ONE, 2022)