Sci—Fri PM: Delivery — 11: Lung Radiotherapy Using Megavoltage Cone-Beam Computed Tomography Imaging Guidance

PURPOSE: To evaluate the accuracy of patient set‐up in lungcancerradiotherapy using daily megavoltage cone‐beam computed tomography (MV‐CBCT) imaging guidance and couch position adjustments. METHODS: Set‐up accuracy using MV‐CBCT has been analyzed in five lungcancer patients (108 fractions) to date, with ongoing patient accrual. The MV‐CBCT and CT planning data set were matched on‐line by a radiation oncologist using manual registration of any …