Objective To evaluate and compare the dosimetric differences of two independent dose verification software in IMRT plans,which are Arc QA and Veri QA based on Monte Carlo algorithm.Methods A total of 87 patients were enrolled in IMRT plans,including 17 for the head and neck,46 for the chest,and 24 for the abdomen.All radiotherapy plans had passed clinical dose verification.Arc QA and Veri QA were respectively adopted to conduct independent dose calculation for IMRT plans,used γ pass rate(3%/3 mm)to analyze the dose distribution between the two verification software and treatment planning system(TPS),and compared the dose differences in PTV dose-volume histogram parameters(including minimum dose,maximum dose,average dose,and D95%)and γ pass rate between Arc QA and Veri QA.Results The dose difference between Arc QA,Veri QA and TPS in PTV was within±2.5%.The γ pass rates of Arc QA and Veri QA on head and neck,chest and abdomen were 98.90%±1.99%and 99.21%±0.85%,95.74%±3.16%and 99.37%±0.77%,as well as 97.10%±2.41%and 99.84%±0.17%,respectively.There was a statistically significant difference between the two software in chest and abdomen(t=-5.972,P<0.05;t=-5.133,P<0.05).Conclusion Arc QA and Veri QA have good dosimetric consistency with TPS,which can meet clinical validation needs and serve as independent validation tools for intensity modulation plans.
维普
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