Observational StudyRegistry Study for Proton Therapy Clinical Outcomes and Long-Term Follow-up

Proton therapy is a limited medical resource that is more expensive than conventional x-ray therapy. To correctly measure the success of proton therapy in treating different conditions, it is important to check a patient's health status after their treatment is finished. Checking on the progress of patients over many years (called long-term follow-up) is needed because the long-term effects of proton therapy are not well known.