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How To: An Approach
• Determine guidance / registration strategy up front
• Clarify Imaging Objectives
1. Prostate Boundary (CTV)
2. Implanted Markers (Guidance/registration surrogate)
3. Tumor-Dense Regions (GTV)
• Manage Prostate Motion
– Must not assume stable prostate geometry b/w acquisitions
– Trade off spatial resolution / acquisition time
– Repeat acquisition if motion blurring present
– +/- antiperistaltic agent + bowel prep
– Consider ERC
Yanke et al, 1991