RT PRO TPS-TaiChi放疗计划系统性能测试

Performance test of RT PRO TPS-TaiChi radiotherapy planning system

目的:对RT PRO TPS-TaiChi(V2.0.0.4656)放疗计划系统的性能进行测试,评价其能否满足临床使用要求。方法:按照YY/T 0889—2013《调强放射治疗计划系统性能和试验方法》要求,设计2个初始测试例计划(前后对穿野计划和带状射野计划),再对4个调强计划测试例(模拟多靶区、模拟前列腺肿瘤、模拟头颈肿瘤和模拟C型靶区)分别设计调强放疗(intensity-modulated radiation therapy,IMRT)和容积旋转调强放疗(volumetric modulated arc therapy,VMAT)2种计划。对设计计划的剂量目标进行评估,并进行点剂量和剂量分布计算准确性验证。结果:4个测试例计划除IMRT计划的模拟C型靶区(复杂)中心圆柱体的D10外,其他指标的剂量目标值均达到标准要求。前后对穿野和带状射野的点剂量误差分别为-0.30%和-0.16%。IMRT计划靶区内测量点剂量的最大误差为3.83%,VMAT计划的最大误差为4.32%,均满足≤4.5%的要求;IMRT计划危及器官内测量点剂量的最大误差为4.01%,VMAT计划的最大误差为4.55%,均满足≤4.7%的要求。IMRT计划复合射野的剂量验证γ通过率(3%/3 mm)最低为96.56%,VMAT计划最低为94.40%,均满足>88%的要求;IMRT计划单野的剂量验证γ通过率(3%/3 mm)最低为93.93%,满足>93%的要求。结论:RT PRO TPS-TaiChi放疗计划系统的性能测试结果符合YY/T 0889—2013标准要求,能够满足临床需求。

Objective To test the performance of RT PRO TPS-TaiChi(V2.0.0.4656) radiotherapy planning system to evaluate its ability to meet the clinical requirements. Methods Based on the requirements of YY/T 0889—2013 "Intensitymodulated radiation treatment planning system—Functional performance characteristics and test methods", two plans(anterior-posterior parallel opposed field and banded field) were designed for the test cases, then intensity-modulated radiation therapy(IMRT) and volumetric modulated arc therapy(VMAT) plans were created for four test cases of intensitymodulated planning for simulating multi target, prostate tumor, head and neck tumor and C-shape target. The target doses of the designed plans were evaluated and the accuracy of point dose and dose distribution calculation was verified. Results The target dose values for all the four test case plans met the standard requirements except for D10in the simulated C-shape target area(complex) central cylinder of the IMRT plan. The point dose errors of the anterior-posterior parallel opposed field and banded field were-0.30% and-0.16%, respectively. The maximum error of the point dose within the target area was 3.83%for the IMRT plan and 4.32% for the VMAT plan, both meeting the requirement of ≤4.5%;the maximum error of the point dose at the organs at risk was 4.01% for the IMRT plan and 4.55% for the VMAT plan, both of which met the requirement of ≤4.7%. The minimum dose verification γ-pass rate(3%/3 mm) of the composite field was 96.56% for the IMRT plan and94.40% for the VMAT plan, both meeting the requirement of >88%;the minimum dose verification γ-pass rate(3%/3 mm) of the single field was 93.93% for the IMRT plan, meeting the requirement of >93%. Conclusion The performance of RT PRO TPS-TaiChi radiotherapy planning system meets the requirements of YY/T 0889—2013 and clinical application. [Chinese Medical Equipment Journal,2022,43(6):50-53]