Prostate-Centric vs. Bony-Centric Registration in the Definitive Treatment of Node-Positive Prostate Cancer With Simultaneous Integrated Boost: A Dosimetric Comparison.
To determine the impact of daily shifts based on rigid registration to intraprostatic markers (IPMs) on coverage of boost doses delivered to gross nodal disease for prostate cancer. Seventy-five cone-beam CTs (CBCTs) from 15 patients treated with definitive radiation for clinically node-positive prostate cancer underwent fiducial-based and pelvic bony-based registration to the initial planning scans.