摘要
该文研究了一种治疗超声探头坐标系统在磁共振中的定标方法,该方法首先在超声探头边沿加工6个定位槽或附着于探头边沿并垂直于探头表面的定位圆柱体作为定位标记物,将6个定位标记物两端12个圆心作为定位标记点,通过计算所有定位标记点在磁共振中的空间三维坐标,得到治疗超声探头与磁共振三维坐标系统的换算关系。另外,利用定位标记点的冗余信息,可以减少超声探头的定位误差,提高定位精度。
This paper provides a method of positioning the ultrasound probe in MR system. Machining 6 slots or cylinder perpendicular to the ultrasound probe surface on the edge of ultrasound probe as markers, 12 central cylinder ends are chosen as positioning points. By calculating these positioning points＇ coordinates in MIR＇s coordinate system, the coordinate transformation between the ultrasound and MR coordinate system can be computed. Furthermore, by taking advantage of redundant information, calculating errors can be reduced and the precision can be improved.
出处
《中国医疗器械杂志》
CAS
2013年第3期166-168,177,共4页
Chinese Journal of Medical Instrumentation
基金
国家自然科学基金项目(30800246)
上海市科委重点攻关项目(09441900500)
关键词
磁共振
治疗超声
超声探头
定位
MR, therapeutic ultrasound, ultrasound probe, positioning
