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AAPM TG-218
Focuses on standardising how measurements are performed and
analysed
“True Composite” measurements preferable to “Perpendicular Field-by-
Field” measurements
Global normalisation
Use dose threshold (10% approx.)
Gamma criteria: 3%/2mm with tolerance of ≥95% and action ≥90%
Examine gamma values >1.5 and review where differences are located
w.r.t. to organs/targets for clinical relevance