Transaxial compression technique for sound velocity estimation

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

1992-02-27

1993-09-28

Jaworski, Francis

Surgery

Truss

Pad

73597, A61B 800

Patent

active

052479374

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: 4434661 (1984-03-01), Miwa et al.
patent: 4580574 (1986-04-01), Gaviah
patent: 4669482 (1987-06-01), Ophir
patent: 4702258 (1987-10-01), Nicolas et al.
patent: 4716765 (1988-01-01), Hirama
patent: 4781199 (1988-11-01), Hirama et al.
patent: 4807635 (1989-02-01), Ophir
patent: 5088498 (1992-02-01), Beach et al.
patent: 5107837 (1992-04-01), Ophir et al.
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. 18, 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. 574-577.
V. E. Robinson et al., Measurement of Belocity of Propagation From Ultrasound Pulse-Echo Data, 1982, Ultrasound in Med. & Biol., vol. 8, No. 4, pp. 413-420.
Kroushop, T. A. et al "A Pulsed Doppler UTS System for Non Invasive Measurements . . . " Jrnl Rehab. Reseach vol. 24 #2 pp. 1-8 .
Green, R. C. et al "Induced Doppler UTS Image System" IBM Tech Discl. Bulletin vol. 20 #8 Jan. 1978.

Affiliated with

Also associated with

Rating

Transaxial compression technique for sound velocity estimation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Transaxial compression technique for sound velocity estimation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transaxial compression technique for sound velocity estimation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2185678