A Ternary Solution for Independent Acoustic Impedance and Speed of Sound Matching to Biological Tissues

Abstract

In applications requiring a liquid which is acoustically well matched to biological tissues, it is often difficult to find a material which is matched well in terms of both the acoustic impedance and speed of sound propagation in it; changing one parameter invariably affects the other. A three component liquid system is described, which allows independent adjustment of these two acoustic parameters over a wide range. This range encompasses the soft tissues of the body. Results of parameter measurements are presented in the form which allows simple determination of the mixture required to match any combination of acoustic impedance and speed of sound propagation over a given range.

Keywords

Acoustic impedance matching liquid path scanner mechanical sector scanner polyethylene glycol speed of sound ultrasound

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