Assessment of combined use of ArcCheck detector and portal dosimetry for delivery quality assurance of head and neck and prostate volumetric-modulated arc therapy.

Purpose: To assess the efficiency of combined use of ArcCheck detector (AC) and portal dosimetry (PDIP) for delivery quality assurance of head and neck and prostate volumetric-modulated arc therapy.

Materials And Methods: Measurement processes were studied with the Gamma index method according to three analysis protocols. The detection sensitivity to technical errors of each individual or combined measurement processes was studied by inserting collimator, dose and MLC opening error into five head and neck and five prostate initial treatment plans.