Baker A C
School of Physics, University of Bath, UK.
Ultrasound Med Biol. 1997;23(7):1083-8. doi: 10.1016/s0301-5629(97)00110-5.
Knowledge of the spatial distribution of intensity loss from an ultrasonic beam is vital to bioeffect predictions such as heating and streaming. A method for calculating the distribution of intensity loss over a finite-amplitude ultrasonic beam is described. The technique demonstrates that the location of peak intensity loss varies considerably with drive level for a plane circular source, as does the overall distribution of intensity loss across the beam. The effects are shown to be less pronounced but still significant for a focused source.
了解超声束强度损失的空间分布对于诸如加热和流动等生物效应预测至关重要。本文描述了一种计算有限振幅超声束强度损失分布的方法。该技术表明，对于平面圆形源，峰值强度损失的位置随驱动水平变化很大，整个波束上强度损失的总体分布也是如此。对于聚焦源，这些影响虽不那么明显，但仍然显著。
