聚焦式治疗机适形调强控制方法研究  

An Automatic 3D-Locating Couch for Radiation Therapy

作　　者：黄禹[1] 段正澄[1] 朱国力[1] 龚时华[1] 

机构地区：[1]华中科技大学机械学院国家数控系统工程技术研究中心,湖北武汉430074

出　　处：《中国医疗器械杂志》2006年第6期407-409,427,共4页Chinese Journal of Medical Instrumentation

摘　　要：提出了一种聚焦式治疗机扫描调强方法。该方法由治疗计划系统对病灶的三维模型进行分层处理,通过逆向设计方法计算和设计各层剂量分布,依据剂量分布计算出焦点在各位置的照射时间,并转换为焦点的扫描运动参数(位置、速度等),然后计算机控制焦点扫描照射病灶,使照射焦点以不同速度,沿规划的轨迹逐层连续完成对病灶的扫描照射。通过焦点扫描运动的速度变化,实现剂量强度的逐点调制。An intensity modulated method by scanning for the focusing therapy machine is introduced in this paper. At first, the 3-D model of the focus is delaminated through the treatment planning system, and the dose distributing of each lay is calculated by an inverse design method. Then, the exposure time of the focus at each position is determined and converted to a scanning parameter, such as position, speed and so on. Afterward, the focus continuously scans the tumor at different speeds along the planned track under the control of the computer. Consequently the point-by- point intensity modulation is achieved through the diversification of the scanning speed of the focus.

关 键 词：聚焦式治疗机 适形调强治疗 扫描控制 三轴联动 

分 类 号：R815[医药卫生—放射医学]