title: Energy of proton accelerator necessary for treatment of choroidal melanomas.
abstract: We have reviewed 94 patients with choroidal melanoma treated by proton beam therapy at the Harvard Cyclotron Laboratory. A beam penetration of f27 mm would be required to treat 90% of the lesions. We conclude that a machine energy of at least 55 and, preferably, 60 MeV would be necessary for a clinically viable therapy unit for the treatment of choroidal melanomas. An extracted beam current of 10(-9) A would be more than sufficient.
mesh_terms: D002830:Choroid Neoplasms / Q000532:radiotherapy*; D006801:Humans; D008545:Melanoma / Q000532:radiotherapy*; D010315:Particle Accelerators; D011522:Protons; D011882:Radiotherapy, High-Energy / Q000379:methods*
chemical_list: D011522:Protons