Purpose: Analyze clinical practice of CT-based simulation, evaluate its effect on 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。
Result: Like X-Ray simulation, CT-based simulation can carry out all the process from simulation to body surface marking.
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。
Objective:To study the clinical application of CT-based simulation and evaluate the its value in the treatment planning of intensity-modulated radiotherapy(IMRT).
前言： 目的：通过CT模拟定位技术的临床应用研究，评价其在调强放疗计划设计中的作用。
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.
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。
The results show that ST changes the hydraulic behavior of the soil significantly and the simulation based on dynamic parameters is remarkably differed from that of CT.
由于耕区土壤水力学参数的变化对免耕法并不敏感，故模拟的水平衡项与传统耕作下的相应值间基本无差异。
The results show that ST changes the hydraulic behavior of the soil significantly and the simulation based on dynamic parameters is remarkably differed from that of CT.
由于耕区土壤水力学参数的变化对免耕法并不敏感，故模拟的水平衡项与传统耕作下的相应值间基本无差异。
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