Quality assurance: Fundamental reproducibility tests for the ADAC Pinnacle3

Abstract

Abstract: The use of image based three dimensional treatment planning has increased significantly the complexity of commercially available treatment planning systems (TPS). Medical physicists have traditionally focused their efforts on understanding the calculational algorithm; this is no longer possible. A quality assurance (QA) program for the Philips ADAC Pinnacle3 treatment planning system is presented. The program is consistent with the American Association of Physicist in Medicine Task Group 53 guidelines and balances the cost versus benefit equation confronted by the clinical physicist in a community cancer center environment. Fundamental reproducibility tests are presented as required for a community cancer center environment utilizing conventional and three dimensional treatment planning. A series of non-dosimetric test including digitizer accuracy, image acquisition and display, and hardcopy output are presented. Dosimetric tests include verification of monitor units, standard isodoses and clinical cases. The tests are outlined for the Pinnacle3 TPS but can be generalized to any TPS currently in use. The program tested accuracy and constancy through several hardware and software upgrades to our TPS. This paper gives valuable guidance and insight to other physicist attempting to approach TPS QA at fundamental and practical levels.

AAPM TG-53, Three-Dimensional, Treatment, Planning, Quality Assurance