体外超声震波治疗冠心病的能量传递过程及声场分布

Energy transfer and sound field distribution of extracorporeal ultrasonic wave for coronary heart disease

目的:研究体外超声震波治疗冠心病的能量传递过程及超声波声场的分布。方法:体外超声震波系统通过产生超声震波并把能量从电能转化为机械能来治疗冠心病。LC振荡能量把电能转化为机械能,然后通过超声辐射出去。利用惠更斯原理计算出超声辐射声场的分布,并使用Matlab仿真软件对其进行仿真。结果:体外超声震波治疗冠心病所需能量为2 J^7 J,高压脉冲值U为3.0 k V^5.5 k V。换能器声场中焦斑呈椭圆状分布,冲击波压力幅值在焦斑中心及反射杯焦点处最大,达到兆帕级。结论:根据换能器能量传递过程及声场分布大小,控制体外震波治疗的发射能量能够保证治疗冠心病的安全。

ObjectiveTo study on the energy transfer and sound field distribution of extracorporeal ultrasonic wave for coronary heart disease. Methods The extracorporeal ultrasonic wave system treated the coronary heart disease by producing ultrasonic waves and converting the electric energy to mechanical energy. LC oscillation energy transferred the electric energy to mechanical energy which was radiated by ultrasound. The sound field distribution was calculated by Huygens principle and simulated by Matlab simulation sol, ware. Results Extracorporeal ultrasonic wave energy needed for coronary heart disease ranged 2 J to 7 J, and the high voltage pulse value was 3.0 kV- 5.5 kV. The focal spot in the sound field of transducer was elliptical distribution and the pressure amplitude was the largest in the focal spot and reflection cup focus, achieving MPa. Conclusion According to the energy transfer and sound field distribution, the safety of the treatment can be ensured by controlling the emitted energy of extracorporeal ultrasonic wave treatment.