Surgery – Truss – Pad
Patent
1977-01-06
1983-07-05
Cohen, Lee S.
Surgery
Truss
Pad
73644, A61B 1000
Patent
active
043912818
ABSTRACT:
An ultrasonic transducer system for use with tissue is shown, which system includes a container of liquid acoustic coupling medium within which focused transducer means are located. Focusing of the transducer means may be effected acoustically, as by use of an acoustic lens, and/or electronically, as by use of a transducer array. The liquid medium container is closed at one end by a rigid acoustically transparent window, or diaphragm, for acoustically coupling to the skin and underlying tissue of the subject under investigation. The material of the liquid acoustic coupling medium is selected so that the velocity of propagation of acoustic waves therein is substantially less than the velocity of the acoustic waves within the tissue under investigation. By using a low speed-of-sound coupling medium a shorter propagation path may be employed than is required by prior art transducer arrangements in which the speed-of-sound in the tissue and coupling fluid is substantially the same. Operation in either scanning or non-scanning modes is contemplated, and scanning, when employed, may be effected mechanically or electronically. In the sector scanning mode, the system may be operated in a manner such that the angular sector swept out by the focused beam in the tissue exceeds that in the low speed-of-sound liquid coupling medium as a result of refraction at the window interfaces.
REFERENCES:
patent: 3168659 (1965-02-01), Bayre et al.
patent: 3251219 (1966-05-01), Hertz et al.
patent: 3270274 (1976-02-01), Green
patent: 3387604 (1968-06-01), Erikson
patent: 3687219 (1972-08-01), Longlois
patent: 3818898 (1974-06-01), Williams
patent: 3927557 (1975-12-01), Viertl
patent: 3958559 (1976-05-01), Glenn et al.
patent: 4001766 (1977-01-01), Hurwitz
Knollman, G. C. et al., "Variable-Focus Liquid-Filled Hydroacoustic Lens", Jrnl. of Acoustic Soc. of Amer., V49, No. 1, pt. 2, pp. 253-255.
Halliday & Resnick, "Physics", Ch. 41, Reflection & Refraction, Wiley & Sons, New York, 1967, pp. 1020-1023.
Hertz, C. H., "Vts Engrg in Heart Diagnosis", Amer. Jrnl. Cardiology, V. 19, Jan. 1967, pp. 6-17.
Lemons et al., "Acoustic Microscopy; Biomed Applications", Science, vol. 188, No. 4191, pp. 905-911, May 1975.
McDicken, W. N. et al., "An UTS Instrument for Rapid B-scanning of the Heart", Ultrasonics, V. 12, No. 6, Nov. 1974, pp. 269-272.
Ray, C. D., "Textbook of Medical Engineering", Yearbook Publishers, Chicago, 1974, p. 1058.
Handbook of Chemistry & Physics, CRC publisher, 1964, p. E-28.
Beckman Victor R.
Cohen Lee S.
Jaworski Francis J.
SRI - International
LandOfFree
Ultrasonic transducer system and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ultrasonic transducer system and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultrasonic transducer system and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1435453