Abstract
Objective Active breathing coordination (ABC) devices have been used to effectively manage respiratory motion by temporarily holding a patient’s breath. To acquire a gated cone beam computed tomography (CBCT) with ABC, multiple breath holds (BH) (∼3) were required because of slow gantry rotation and short breath-hold periods. The variability of inter-BH tumor position introduced artifacts in the reconstructed CBCT images and affected tumor localization. This study aimed to quantify the effect of inter-BH tumor displacement on target localization in ABC-gated CBCT image guidance.
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