ATPS1

Check the constancy of external beam dose calculations using a standard set of at least four clinical plans covering a range of geometries, energies, and modalities (see more information in IAEA Technical Reports Series No. 430 section 10.2.89). For each type of plan, the testing shall include the most extreme scenarios likely to be encountered clinically. As part of the constancy check, the repeatability of the calculated dose‐volume histogram (DVH) shall be reviewed. Consistency between calculated percentage depth doses (PDD) and tissue‐phantom ratios (TPR), open, blocked, and wedged fields dose profiles shall be compared with the corresponding beam data used for the TPS commissioning. Calculation must be performed using the clinical mode of the TPS. Test the treatment planning process from end‐to‐end under the most realistic circumstances: CT scan and plan an anthropomorphic phantom using the immobilization devices used clinically. Treat the phantom in clinical mode including usual imaging; verify the measured to plan‐dose agreement by comparing it with baseline TPS commissioning data

ATPS2

To ensure redundancy and adequate monitoring, a second qualified medical physicist must independently verify the implementation, analysis, and interpretation of the quality control tests at least annually