PO-0859: Quantifying and Categorizing Plan Rejections As a Part of the Clinical Process Improvement

______________________________________________________________________________________________________coverage is compromised in the region of PlanSMPCM (yellow).Table 1: Comparison of VMAT S-IMRT and Do-IMRT plan dosevolume statistics for PlanPTVs (edited 5mm from body surface and excluding PlanPTV_6500 from PlanPTV_5400), spinal cord, brainstem, contralateral (CL) and ipsilateral (IL) parotids, PlanSMPCM and PlanIPCM.Conclusion: Do-IMRT can be achieved using VMAT for the DARS trial.Fixed-field IMRT may also be used to reduce constrictor dose, however is unlikely to produce plans acceptable within the DARS trial QA guidelines.