Influence of Pro-Qura generated pre-plans on postimplant dosimetric quality: A review of a multi-institutional database

vs. 89.3% and 102.3% for Pro-Qura and community plans, respectively. When analyzed in terms of the first 8 sequence groups (10 patients/sequence group) for each institution, Pro-Qura planning resulted in less postimplant variability for V100 (86.2– 89.5%) and for D90 (97.4 –103.2%) while community-generated plans had greater V100 (85.3–91.2%) and D90 (95.9 –105.2%) ranges. In terms of sequence groups, postimplant dosimetry was deemed “too cool” in 11% to 30% of cases and “too hot” in 12% to 27%. On average, no clinically significant postimplant dosimetric differences were discerned between Pro-Qura and community-based planning. However, substantially greater variability was identified in the community-based plan cohort. It is possible that the Pro-Qura plan and/or the routine postimplant dosimetric evaluation may have influenced dosimetric outcomes at community-based centers. © 2008 American Association of Medical Dosimetrists.