Physics Bucharest 2017
6/3/2017
IMRT quality assurance
Machine related QA: Small field effects Small number of monitor units Tongue and groove effects Verify Leaf Positions Output tolerance tighter Isocenter, mechanical tolerance tighter (smaller target) Dosimetric accuracy
Immobilization
79
ESTRO physics course 2017
ICRU 83 Patient specific QA A.2.3
Individual beams No agreement on pass–fail criteria for the gamma value Absorbed dose in Phantom Dosimetric accuracy of 5%
Independent absorbed-dose calculation The independent absorbed dose calculation must be able to compute the absorbed dose in 3D so that the calculation can be tested at a statistically relevant number of points In vivo dosimetry TLD, Diode, MOSFET, EPID Dosimetry
80
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