Purpose: To investigate the impact of radiation treatment quality assurance (RTQA) on treatment outcomes in a phase III trial for advanced head and neck cancer. Materials and Methods: A total of 767 patients from NRG/RTOG 0522 were included in this study. The contours of target volume (TV) and organ at risk (OAR). and dose-volume coverage of targets were reviewed and scored (per-proto... https://www.deliandiver.com/product-category/housing/