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诸如声压振幅这类声场参数通常是在水槽中测得的。因此,人体中的声场只能在对组织声学性质了解的基础上进行估计而通常不能立即得到。为研究超声的生物效应,了解受辐照的组织体中准确的声场参数是重要的。这要求声场参数的测量直接在活体中进行。这是用手术方法把小型针状PVDF水听器探头植入受辐照的动物体内开然后用5MHg聚焦换能器以空间峰值时间峰值强度I_(SPTD)分别为500W/cm~2和1500W/cm~2进行辐照。将给出植入的水听器在妊娠Wistar鼠子宫中测得活体条件下的空间峰值脉冲平均声强I_(STPD)、空间峰值时间平均声强I_(STPD)和最大声强I_n值。通过与水中测量
Sound field parameters such as sound pressure amplitude are usually measured in a sink. Therefore, the sound field in a human body can only be estimated based on an understanding of the acoustic properties of the tissue and can not usually be obtained immediately. To study the biological effects of ultrasound, it is important to understand the exact acoustic field parameters in the irradiated tissue. This requires that the measurement of sound field parameters be performed directly in the living body. This is a surgical method to implant a small needle-shaped PVDF hydrophone probe exposed animals and then use 5MHg focusing transducer with peak spatial peak time intensity I SPTD were 500W / cm 2 and 1500W / cm ~ 2 irradiation. The spatial peak impulse intensity ST_ (STPD), spatial peak temporal mean intensity I_ (STPD) and maximum intensity I_n of the implanted hydrophone measured in living wistar rat uterus will be given. Pass with water measurement