Prostate Margins for Real-Time Monitoring and Correction Strategies

To determine appropriate prostate beam margins for use with real-time position monitoring and correction strategies, and assess the impact of each strategy. Under IRB approved protocols, 35 patients at 5 institutions were enrolled to study intrafraction prostate motion using the Calypso® 4D Localization System in which 3 Beacon® electromagnetic transponders are implanted into the prostate. The prostate was initially aligned using skin marks and...