CONCLUSION
MIs
The relationship between GPR (3%/2 mm) and the complexity of VMAT plans was studied by analyzing different MIs. We found that PA, PI, and total MU have the highest level of impact on GPR. However, because MU is already included in PA and PI calculations these metrics may not be fully independent predictors of GPR. According to our result, the ML approach is a useful tool to help medical physicists better evaluate and identify the sources of error in patient‐specific QA measurements.