Objective To study and develop treatment planning system of intensity modulated radiotherapy(IMRT).

目的研制开发调强放射治疗逆向计划系统。

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As an advanced conformal therapy, Intensity-modulated radiotherapy (IMRT) can increase the gain ratio of radiotherapy and improve the local control of the tumor.

调强放疗(IMRT)是一种先进的适形放射治疗方法，能提高放射治疗的治疗增益比，促进肿瘤的局部控制。

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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。

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The technique, called Image Guided Intensity Modulated Radiotherapy Treatment uses imaging provided by a CT scan to target the tumour before a powerful but precisely shaped radiation dose is administered.

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