Aperture Variability in Proton Beam Therapy for Prostate Cancer

M. McDonald, J. Kuros-Zolnierczuk, Q. Zhao, I. Das & P. Johnstone
Background: Proton therapy with passive beam scattering typically requires creation of customized brass apertures for each field, which contribute to the overall cost of treatment. In our practice, prostate cancer patients are treated with standard GTV to PTV expansions based on prostate and seminal[for full text, please go to the a.m. URL]