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目的研究笔者所在放疗中心的两种治疗计划系统Xio和precise的剂量学差异性。方法选取5例宫颈癌患者，使用Tmocon医生工作站勾画靶区及危机器官，分别导入Xio4.2.1和Precise2.02两种治疗计划系统，基于在射野方向和数目相同、保证处方剂量线包绕95%靶区体积的前提下,分别设计调强放疗计划。比较这2种计划的靶区的适形度指数CI和均匀性指数HI，危机器官膀胱的V50，还有子野数和机器跳数。结果 Xio和Precise做出来的两种计划均能满足临床要求。计划靶区体积适形度指数值分别为(0.76±0.12)和(0.72±0.13)(=5.171,>0.05),均匀性指数值分别为(14±2)%和(13±1)%(=1.87,>0.05)；膀胱受量分别为(42.7±7)%和(41.5±6.9)%(=0.336,>0.05),机器跳数(MU)分别为(536±67)MU和(399±52)MU(=2.788，0.05);the volume of bladder received 50 Gy(V50)were(42.7±7)%and(41.5±6.9)%(t=0.336, >0.05);the total monitor units(MU)were(536±67) and(399±52)(=2.788,<0.05);the segment numbers were (62±12)and (19±3)(=2.245, <0.05). Conclusion There were no significant dif erences of CI,H I,and V50 of bladder between XIO and Precise.There were fewer MUs and segment numbers in Precise plan than Xio,Precise plan could reduce the machine abrasion and treatment time,but the segment numbers are higher significantly than XIO plan.