TABLE 3.

Error detection capabilities of various gamma criteria in PD measurements evaluated per treatment field

	Portal dosimetry
QA criterion	γ2%/2 mm	γ2%/1 mm	γ1%/1 mm
AUC	0.988	0.982	0.993
Std. uncertainty AUC	0.004	0.005	0.003
Optimum threshold [%]	99.6	94.5	87.5

Besides the AUC and the corresponding standard uncertainty each criterion's optimum decision threshold is stated.