Abstract

Kilovoltage Cone-Beam Computed Tomography (kV-CBCT) images have less soft tissue contrast when compared to the diagnostic quality images obtained from a CT On-rails (CTOR) system. In addition to daily prostate localization, this volumetric data is valuable for estimation of daily dose delivery and potentially for real time planning, requiring accurate prostate contouring. Using CTOR or kV-CBCT images, we sought to quantify the reproducibility of manual and automated prostate contouring.

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