SU‐F‐J‐213: Feasibility Study of Using a Dual‐Energy Cone Beam CT (DECBCT) in Proton Therapy Treatment Planning

Purpose: The aim of this study is to evaluate the feasibility of using a dual‐energy CBCT (DECBCT) in proton therapy treatment planning to allow for accurate electron density estimation. Methods: For direct comparison, two scenarios were selected: a dual‐energy fan‐beam CT (high: 140 kVp, low: 80 kVp) and a DECBCT (high: 125 kVp, low: 80 kVp). A Gammex 467 tissue characterization phantom was used, including the rods of air, water, bone …