聚焦超声手术中治疗目标三维超声定位系统的研制

The Development of 3D US System for Treating Target Localization in Focused Ultrasound Surgery

聚焦超声手术是一种非常有前途的微损伤手术技术。由于聚焦点超声强度极高,为了确定治疗部位,提高治疗效率和安全性,需要对治疗目标进行三维空间区域精确定位。介绍研制的一套三维超声定位系统及其工作流程。该系统主要由图像系统、运动机构及其控制电路、以及位置反馈机构等几部分组成。该定位系统最大扫描范围为±30°,角度分辨率从0.54’到0.36°八级可调;对于球形目标,理论上可定位的最大直径为160mm。该系统能够用于聚焦超声手术中对适应部位的常规大小的治疗目标进行较精确的定位。

Focused Ultrasound Surgery(FUS) is a promising minimally invasive technique in tissue ablation. Because of the high intensity at the ultrasound focus, a precise 3D-localization system is required to determine the site of the treating target in order to increase the efficiency and securilty of FUS.This paper represents a three dimensional ultrasound(3D US) localization system developed and its workflow.The system is mainly composed of imaging and image processing system, movement device and its controlling circuits, and position feedback device. The system has a maximum scan range of ± 30°with a resolution of 8 levels from 0.54' to 0.36°. For a spherical shape like target, in theory, the maximum diameter is 160mm the system can treat .The system can be used to localize precisely the treatment targets with general sizes in the suitable parts of the body in FUS.