Transaxial compression technique for sound velocity estimation

Details Transaxial compression technique for sound velocity estimation Transaxial compression technique for sound velocity estimation

1989-11-17

1992-09-01

Jaworski, Francis

Surgery

Truss

Pad

73597, A61B 800

Patent

active

051430703

ABSTRACT:
An improved ultrasonic pulse-echo method and apparatus that has particular application in estimating sound velocity in organic tissue is disclosed. The method employs a standard transducer or transducer containing device which is translated transaxially, thereby compressing or displacing a proximal region of a target body in small known increments. At each increment, a pulse is emitted and an echo sequence (A-line) is acquired from regions within the target along the sonic travel path or beam of the transducer. Segments of the echo sequence corresponding to a distal region within the target are selected as a reference to estimate the incremental change in echo arrival time. A plot of these arrival time estimates versus the target compression depth is then generated and a least squares linear fit is made. The slope of the linear fit is c.sup.-1, where c is an estimate of the speed of sound in the target.

REFERENCES:
patent: 2894595 (1959-07-01), Brown
patent: 3942381 (1976-03-01), Brown et al.
patent: 4244226 (1981-01-01), Green et al.
patent: 4361154 (1982-11-01), Pratt, Jr.
patent: 4383533 (1983-05-01), Bhagat et al.
patent: 4434661 (1984-03-01), Miwa et al.
patent: 4492117 (1985-01-01), Chubachi
patent: 4566460 (1986-01-01), Soto et al.
patent: 4580574 (1986-04-01), Gavish
patent: 4669482 (1987-06-01), Ophir
patent: 4702258 (1987-10-01), Nicholas et al.
patent: 4716765 (1988-01-01), Hirama
patent: 4745808 (1988-05-01), Hagen
patent: 4781199 (1988-11-01), Hirama et al.
patent: 4805622 (1989-02-01), Riedlinger et al.
patent: 4807635 (1989-02-01), Ophir
J. Ophir, et al., Optimization of Speed-of-Sound Estimation from Noisy Ultrasonic Signals, Jan. 1989, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 36, No. 1, pp. 16-24.
N. Hayashi, A New Method of Measuring In Vivo Sound Speed in the Reflection Mode, Feb. 1988, J. Clin. Ultrasound 16, pp. 87-93.
J. Ophir and T. Lin, A Calibration-Free Method For Measurement of Sound, Speed and Biological Tissue Samples, Sep. 1988, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 35, No. 5, pp. 573-577.
D. E. Robinson, et al., Measurement of Velocity of Propagation From Ultrasound Pulse-Echo Data, 1982, Ultrasound in Med. & Biol., vol. 8, No. 4, pp. 413-420.
Konton Assios and Ophir, Variance Reduction of Speed of Sound Estimation in Tissues Using Beam Tracking Method, Sep. 1987, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. UFFC-34, No. 5, pp. 524-530.
Kondo, et al., A Fundamental Evaluation of In Vivo Velocity Measurement by Crossed Beam Method, 1986, 2419, Japanese Journal of Applied Physics, vol. 25, Supplement 25-1, pp. 100-102.

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