Ramsey C R, Cordrey I L, Spencer K M, Oliver A L
Thompson Cancer Survival Center, Department of Radiation Oncology, Knoxville, Tennessee 37916, USA.
Med Phys. 1999 Jul;26(7):1188-95. doi: 10.1118/1.598614.
The Task Group 23 (TG-23) radiation treatment planning dosimetry verification package was used to evaluate the dosimetric accuracy of two commercially available treatment planning systems. The TG-23 test package contains experimentally measured beam data for two x-ray beams (4 and 18 MV) that can be used as input for 3D-RTP (three-dimensional radiation treatment planning) systems. Once the beam data is entered and modeled, a series of test cases are performed that isolate different aspects of the dose computational process. The computed values from the 3D-RTP system are compared against the measured dosimetry data, included in the package, for a set of comparison points within each test case. Both of the treatment planning systems that were studied provided excellent agreement between computed and measured doses. The cumulative 4 and 18 MV TG-23 test results for the convolution/superposition based planning system indicates that 96% of the dosimetric test points are within +/-2%, and 98% are within +/-3% of the tabulated TG-23 values. The dosimetric TG-23 test results for the pencil beam kernel based planning system are similar, with 96% of the test points falling within +/-2%, and 99% falling within +/-3% of the TG-23 measurements.
任务组23（TG - 23）放射治疗计划剂量学验证包用于评估两种商用治疗计划系统的剂量学准确性。TG - 23测试包包含两个X射线束（4和18 MV）的实验测量束数据，可作为三维放射治疗计划（3D - RTP）系统的输入。一旦输入束数据并进行建模，就会执行一系列测试用例，以分离剂量计算过程的不同方面。将3D - RTP系统的计算值与包中包含的测量剂量学数据进行比较，针对每个测试用例中的一组比较点。所研究的两种治疗计划系统在计算剂量和测量剂量之间都具有很好的一致性。基于卷积/叠加的计划系统的4和18 MV TG - 23累积测试结果表明，96%的剂量学测试点在TG - 23表格值的±2%范围内，98%在±3%范围内。基于笔形束核的计划系统的剂量学TG - 23测试结果类似，96%的测试点落在TG - 23测量值的±2%范围内，99%落在±3%范围内。
