Comparison of IMRT QA measurement methodology

Locally advanced non-small cell lung cancer: current issues and recent trends

“…They found no significant dosimetric variation for either PTV or OARs that were introduced by random leaf position errors, whereas clinically significant differences (8% variation in D95% and approximately 12% in D0.1 cc to critical organs) were noted by systematic leaf position errors in complex IMRT plans. Alaswad and Coleman [77,78] concluded that when 2D gamma analysis is performed using a 3% dose difference and a 3-mm DTA, both QA results and the error detectability are heavily dependent on the plane chosen for measurement acquisition, and no relationship was found between the error levels in several verification planes.…”