Measuring and testing – Vibration – By mechanical waves
Patent
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.
Flax Stephen W.
Riley James K.
Ciarlante Anthony V.
General Electric Company
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