作为诊断超声设备的通常特性,在最好情况下也只能给出相比于换能器表面不同位置上的声压场的详细描述。从这些数值可以推算出声强的计值。当诊断超声辐照不产生可发觉的危害性生物效应时,就很难评价在导致生物变化的可能生物物理机制中哪个是最重要的,从而很难说明在描述超声辐照时 As a general characteristic of diagnostic ultrasound equipment, only a detailed description of the sound pressure field at different locations on the transducer surface can best be given at best. From these values ​​can be calculated sound intensity value. When diagnosing ultrasound radiation does not produce detectable harmful biological effects, it is difficult to evaluate which of the possible biophysical mechanisms that lead to biological changes is the most important, and thus it is difficult to state that in describing ultrasound irradiation