多阵元高强度聚焦超声多目标控制方法研究

Multi-objective control for multi-elements HIFU surgery

对多阵元高强度聚焦超声非侵入外科治疗采用多目标控制方法可望取得好的温度控制性能 .提出和构造了闭环控制的模糊控制器 ,从而得到好的温度特性 ;为得到理想的能量空间分布 ,专门形成了优化声场的模式控制 ;另外 ,重要参量辨识和开关模式控制技术是十分有效的控制方法 .考虑非线性效应的仿真结果显示出优越的控制性能 .随后的活体实验结果显示出好的温度响应特性 。

Multi\|objective control methods are used for noninvasive multi\|elements high intensity focusing ultrasonic(HIFU) surgery to obtain optimal space/time temperature control properties. The fuzzy logic controller is proposed and implemented in a closed\|loop temperature control system to achieve good temperature response. The optimal acoustic field patterns are formed to assure ideal spatial energy distributions for HIFU surgery. In addition, the identification of the important parameter and switch mode techniques are effectively used in the HIFU control system. By considering nonlinear effects, the simulation results show satisfactory control properties. The experiments followed also show quite good temperature response and effectiveness of the multi-objective methods.