Abstract
With the introduction of linear accelerators equipped with kV cone-beam CT (CBCT) imaging, prostate localization is feasible immediately prior to treatment. We developed an automatic 3D gray-value registration method for fast prostate (plus seminal vesicles) localization on CBCT scans that could be used during on-line or off-line image-guided radiotherapy. The main cause for unsuccessful registration was the presence of artifacts in the CBCT images caused by large moving gas pockets during CBCT image acquisition.
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