Hegazy EA. Evaluation of Using Radiographic Films in Measurements of Penumbra Width for Radiotherapy Applications and Stereotactic Radiosurgery: medical physics. JAP [Internet]. 2018 Jan. 17 [cited 2024 Dec. 22];14(1):5204-12. Available from: https://rajpub.com/index.php/jap/article/view/6465