Ultrasonic plethysmograph

Details Ultrasonic plethysmograph Ultrasonic plethysmograph

1991-01-18

1992-02-18

Jaworski, Francis

Surgery

Truss

Pad

A61B 802

Patent

active

050884980

ABSTRACT:
Quadrature phase signals (I and Q) from a pulsed Doppler medical instrument are analyzed to detect phase changes of consecutive echoes from tissue at a depth of interest. Such phase changes are analyzed to determine tissue displacement. Relative displacements at different depths are examined to detect tissue expansion and contraction. The area of the uterus of a pregnant female can be scanned and the frequency of tissue displacement or expansion and contraction examined to determine pulsations due to blood supplied by the fetal heart and/or pulsations due to blood supplied by the maternal heart. Conventional M-mode or B-mode images can be colorized differently for different frequencies of tissue displacement.

REFERENCES:
patent: 3631849 (1972-01-01), Norris
patent: 4122427 (1978-10-01), Karsh
patent: 4370985 (1983-07-01), Takaichi et al.
patent: 4751847 (1988-06-01), Katakura et al.
Seeds, J. W. et al., "Practical Obstetrical Ultrasound" Aspen Publishers, Rockville, Md., .COPYRGT.1986, pp. 124-129.
Maulik, D. et al., "Foetal Doppler Characterization . . . " Amer. Jrnl. Cardiology, 2/1/84, vol. 53, pp. 572-578.
Kay, L. et al., "Echocardiophone" Ultrasonics, vol. 15, No. 3, May 1977.
"Vascular Ultrasound Ultrasonic Evaluation of the Carotid Bifurcation", by Langlois, Roederer and Strandness, published in vol. 4, No. 2, of Echocardiography a Review of Cardiovascular Ultrasound (Futura Publishing Company, Inc., 1987).
Doppler Ultrasound and Its Use in Clinical Measurement, Peter Atkinson and John P. Woodcock (San Francisco: Academic Press, 1982), particularly pp. 54 and 74.
Biomedical Ultrasonics, P. N. T. Wells (San Francisco: Academic Press, 1977), particularly Chapter 9.
"Doppler Ultrasound: A Technique for Obtaining Arterial Wall Motion Parameters", IEEE Transactions, Charles F. Olsen.
"On the Development of a Multigate Pulsed Doppler System with Serial Data Processing", A. P. G. Hoeks, Ph.D. Thesis University of Limburg, Maastricht, Holland, 1982.
"Doppler Measurement of Myocardial Thickening with a Single Epicardial Transducer", American Journal of Physiology, Craig J. Hartley et al., 245: 6 (1983), pp. H1066-H1072.
"Ultrasonic Measurement of Small Displacements and Deformations of Tissue", Ultrasonic Imaging, L. S. Wilson and D. E. Robinson, 4 (1982), pp. 71 to 82.

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