CT模拟定位在放射治疗中的应用

CT-Based Simulation in Radiation Therapy

目的 :通过对CT模拟定位系统在临床应用上的探讨 ,评价其在放疗中的作用。方法 :用CT机、激光定位系统、“魔十字”、STAR -2000三维计划系统和加速器共同完成对肿瘤病人的CT模拟定位和治疗计划的制定。结果 :CT模拟定位可以和X线模拟定位一样完成从定位到做体表标记的全过程。利用CT进行定位 ,可为靶区的确定、复杂多野照射、立体定向放疗提供更多的原始信息和更高的定位精度 ,治疗等中心与实际靶中心的误差小于2mm。结论

Purpose:Analyze clinical practice of CT-based simulation,evaluate its effect on radiation therapy .Method:Make use of CT,laser patient's marking system,magic cross,STAR-2000 3D planning system and accelerator,to carry out CT-based simulation and therapy planning.Result:Like X-Ray simulation,CT-based simulation can carry out all the process from simulation to body surface marking.It can provide more original information,higher simulation precision.The deviation between the treatment isocenter and target's is less than 2mm.Conclusion:The CT-based simulation can be externally used in most of tumor patients' simulation.