Table 3.

Review of studies on sensitivity and specificity of each EPID-based PSQA system to detect errors.

System	Author	Tests performed	Results
Portal Dosimetry Epidose	Bailey et al. 2012	1 patient plan, global dose TPS beam model commissioning error	Portal Dosimetry not sensitive to 5% MU/cGy error while Epidose was sensitive
Dosimetry Check (RadCalc EPID)	Wu et al. 2012	10 patient plans with MLC and gantry offset errors	PTV result sensitive to MLC, V10% sensitive to gantry
Epiqa	Fredh et al. 2013	4 patient plans with introduced MU, MLC, and collimator errors	100% detected by Epiqa, better than other detectors (Delta4, Octavius, Compass)
Epiqa	Vieillevigne et al. 2015	4 patient plans with introduced MLC, collimator, gantry, couch errors	Performance similar to other detectors (ArcCheck, PTW 794)
PerFRACTION Portal Dosimetry	Bresciani et al. 2018	1 patient plan with introduced MU, MLC errors	3D (log file based) method compared to Portal Dosimetry. Similar sensitivity, higher specificity