Proton beam therapy, a form of external beam radiation, has been around for a while but is less commonly utilized than other forms of radiation therapy, which is partly due to availability. Certain properties of protons show potential for a different approach to radiation therapy. This article also considers how implementation of imaging helps improve treatment outcomes. 

SBRT is a unique modality of radiation treatment. Typically, radiation therapy is delivered in many small doses called fractions (often 40 or more), but studies have been created to explore the possiblity of delivering radiation in fewer, larger doses. This article covers two studies, examining the outcome of hypofractionated (fewer fractions) treatment delivered by SBRT.