Brakes – Wheel – Transversely movable
Patent
1994-10-24
1996-07-30
Jaworski, Francis
Brakes
Wheel
Transversely movable
7386125, A61B 806, G01F 166
Patent
active
055402305
ABSTRACT:
An ultrasonic transducer apparatus of variable frequency including a diffracting structure adapted for emitting and receiving a plurality of diffracted ultrasonic beams of calculable different angles for determining the velocity of a fluid flowing through a lumen, and flow volume. Velocity and flow volume are determined from at least two equations in the two unknowns of the velocity, and the angle between the ultrasonic transducer apparatus and the direction of the fluid flow, and from a determination of the diameter of the lumen.
REFERENCES:
patent: 4075516 (1978-02-01), Hattori et al.
patent: 4142412 (1979-03-01), McLeod et al.
patent: 4375767 (1983-03-01), Magori
patent: 5105814 (1992-04-01), Drukarey et al.
patent: 5295487 (1994-03-01), Saitoh et al
patent: 5305758 (1994-04-01), Dietz et al.
Atkinson and Woodcock, Doppler Ultrasound and Its Use in Clinical Measurement, Academic Press, London (1982).
Hoeks et al., "Comparison of the Performance of the RF Cross-Correlation and Doppler Auto-Correlation Techniques to Establish the Mean Velocity", in Ultrasound in Medicine and Biology, p. 727 (1993).
L. Kinsler, et al., Fundamentals of Acoustics, John Wiley & Sons (3rd ed. 1982).
Overbeck et al., "Vector Doppler: Accurate Measurement of Blood Velocity in Two Dimensions", Ultrasound in Medicine and Biology, vol. 18, p. 19 (1992).
Born & Wolf, Principles of Optics, pp. 401-414, Pergamon Press. Oxford (3rd. ed. 1964).
Brown L., "Piezoelectric Polymer Ultrasound Transducers for Nondestructive Testing", Proceedings of ASNT Fall Conference, Valley Forge, PA, Oct. 9-13, 1989.
Drukarey et al., "Beam Transformation Techniques", IEEE Trans. Ult., Ferro, and Freq. 40, p. 717 (1993).
K. Katakura et al., "Underwater Acoustic Imaging by Frequency Controlled Beam Scanning"Nihon Onkyo Gakkaishi, 1975 31(12) 716-724.
"Underwater Acoustic Imaging by Frequency Controlled Beam Scanning", by K. Katakura et al., in Nihon Onkyo Gakkaishi, 1975 31 (12) 716-724.
Echocath Inc.
Jaworski Francis
LandOfFree
Diffracting doppler-transducer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Diffracting doppler-transducer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diffracting doppler-transducer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1652354