External beam radiation therapy is used to treat many types of cancer. it is a local treatment, where a machine aims radiation at your cancer. Learn more about different types of external beam radiation therapy, and what to expect if you're receiving treatment.

Proton beam radiotherapy (PBT) is a form of external beam radiation used in cancer care that provides the opportunity for better precision in dose delivery than other types of external beam radiotherapy. 1 Owing to its unique deposition characteristics, PBT is potentially superior to photon-based therapy for tumors with complex anatomy.

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