NONINVASIVE MEASURING TECHNIQUE FOR ACOUSTIC VIBRATION VELOCITY IN ELASTIC TISSUE Russian patent published in 2009 - IPC A61B8/08 A61B5/05 G01N29/07 

FIELD: medicine.

SUBSTANCE: according to the method, contact members of a transmitting and receiving transducer are pressed to surface of analysed biological tissues at the same pressure force. Mechanical vibration of acoustic wave range is excited on surface of analysed tissue; delay time of the sensed signal is measured concerning the radiated one. The measurements are performed at a number of acoustic frequencies using a harmonic signal of constant frequency and amplitude for each measurement. Each measurement is preceded with instrument calibration to evaluate natural frequencies of the instrument elements to be excluded from those used in measuring. The induced noise signals are compensated. The pressure force is of the converters specified so that to provide the least penetration depth of acoustic waves into analysed biological tissue. Then measurements are performed at a number of frequencies with amplitude of the received signal are extreme.

EFFECT: higher reliability of measurements.

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