To compare the difference volume calculation for region of interest (ROI) between ModernTPS - Winergy and Eclipse treatment planning system, and provide reference for different TPS in clinical application. Three kinds of regular contours on CT image were delineaed,including square、circle and triangle, and manually the volume of these regular contours as reference values were calculated. The differences of Winergy、Eclipse with the reference value were analyzed. In addition,an actual patient case was selected,the differences calculated by two TPS volume were compared. The differences between reference value and the two TPS calculated volume of square、circle and triangle decreased as volume increased. The average difference of Winergy with reference value was 3. 08% , and E-clipse with reference value was -5. 71% . Compared with reference value, Winergy is positive deviation, and Eclipse is negative deviation, but the wo TPS all meet the clinical requirements.%分析对比ModernTPS - Winergy与Eclipse治疗计划系统在计算感兴趣区(ROI)体积上的差异,为物理师在临床应用不同品牌计划系统时提供参考.在CT图像上勾画正方形、圆形和三角形三种规则轮廓,手工几何计算这些规则轮廓的体积作为基准值,对比分析Winergy、Eclipse与基准值的差异.另外选取一实际患者病例,对比两家产品体积计算的差异.两家计划系统计算的正方形、圆形、三角形三种轮廓与体积基准值的差异随轮廓体积的增加而减小,Winergy与体积基准值的平均差异为3.08％,Eclipse与体积基准值的平均差异为-5.71％.Winergy计算结果相比基准值为正偏差,Eclipse计算结果相比基准值为负偏差,但两家基本都满足临床要求.
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