Preliminary Study on Thin Catheter Type Ultrasonic Transducer with Acoustic Lens for Diagnosis and Therapy

近年来，治疗和诊断都需要更高功率的超声。开展了声透镜导管式超声换能器的初步研究。PE计算方法模拟了用光学设计程序设计的小型声透镜的压力场。制作了声透镜，并在水箱中进行了测量。理论计算结果与实验测量结果吻合较好，并对超声辐射组织体模的温度进行了数值模拟。制作了一种模拟骨骼的琼脂体模，用于测量其中的温度。用热电偶测得的温度与模拟结果相吻合。

The higher power ultrasonic is recently required for therapy and diagnosis. We developed the preliminary study on the catheter-type ultrasonic transducer with acoustic lens. PE calculation method simulated the pressure filed of small acoustic lens that was designed by optical design program. An acoustic lens were made and measured in water tank. Theoretical results and measured results agreed well.We also simulated the temperature in tissue phantom radiated by ultrasound. An agar phantom with mimic bone is produced for the measurement of temperature in it. Temperatures measured by thermocouples were agreed with simulation results.