Goitein M, Gentry R, Koehler A M
Int J Radiat Oncol Biol Phys. 1983 Feb;9(2):259-60. doi: 10.1016/0360-3016(83)90108-6.
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.