Method and means for attaining ultrasonic attenuation by vector

Details Method and means for attaining ultrasonic attenuation by vector Method and means for attaining ultrasonic attenuation by vector

1982-07-19

1984-10-09

Ciarlante, Anthony V.

Measuring and testing

Vibration

By mechanical waves

G01N 2904

Patent

active

044753977

ABSTRACT:
The ultrasonic wave attenuation of tissue undergoing examination is determined by directing a plurality of ultrasonic signals into the tissue, receiving and detecting a measure (e.g. zero crossings) of the frequencies of ultrasonic signals reflected from various depths in said tissue, and averaging the measures of the frequencies for each of the various depths. Attenuation of the tissue between a first depth and a second depth is determined from a comparison of the averaged measure at the first depth and the averaged measure at the second depth.

REFERENCES:
patent: 3309914 (1967-03-01), Weighart
patent: 4016750 (1977-04-01), Green
patent: 4361043 (1982-11-01), Engle
"Statistical Evaluation of the Doppler Ultrasonic Blood Flowmeter", Flax et al., ISA Transactions, vol. 10, No. 1, 1971.
"Ultrasonic Attenuation Tomography of Soft Tissues", Dines et al., Ultrasonic Imaging, vol. 1, No. 1, 1979.
"Estimating the Acoustic Attenuation Coefficient Slope for Liver from Reflected Ultrasound Signals", Kuc et al., IEEE Transactions on Sonics and Ultrasonics, vol. SU-26, No. 5, Sep. 1979.

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