Wu J R, Du G H
Department of Physics, University of Vermont, Burlington 05405.
Ultrasound Med Biol. 1990;16(5):489-98. doi: 10.1016/0301-5629(90)90171-8.
The steady state temperature elevation generated by a focused Gaussian beam, including the effect of perfusion, has been calculated along the beam axis. The medium is assumed to be a homogeneous absorbing one. The results indicate: (1) The temperature rise is an increasing function of the intensity gain of the focusing transducer, but never seems to exceed twice that at the interface of the transducer and the medium generated by its unfocused counterpart; and (2) The temperature rise at the interface of the transducer and the medium is not affected significantly by focusing.
已沿光束轴计算了聚焦高斯光束产生的稳态温度升高，其中包括灌注的影响。假设介质是均匀吸收介质。结果表明：(1) 温度升高是聚焦换能器强度增益的增函数，但似乎从未超过其未聚焦对应物在换能器与介质界面处产生的温度升高的两倍；(2) 换能器与介质界面处的温度升高不受聚焦的显著影响。
