<原著>生体モデル中での強力超音波波形の変化

概要

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A comparison of nonlinear acoustic behavior observed in water and in a tissue mimicking material, and the effect of use of such a material for the ultrasonic waveform is examined. The ultrasonic waveform from an Extacoporeal Shock Wave Lithotripter using a piezo electric ceramic is deformed to the shock wave form in water. The nonlinear effect makes the wave form very sharp, on the other hand, the biological tissue have an absorption coefficient proportional to f^<1.1〜1.3>, the absorption coefficient decrease the high frequency components of the waveform. The relationship of the two effects on the ultrasonic wave form is experimentally observed using a newly developed tissue mimicking material. From these observations, the shock wave form in the biological tissue must be considered much different from the wave form in water.
鈴鹿医療科学大学の論文
1996-03-30