Ultrasonic doppler blood flow velocity detection apparatus

Details Ultrasonic doppler blood flow velocity detection apparatus Ultrasonic doppler blood flow velocity detection apparatus

1989-12-19

1991-11-19

Jaworski, Francis

Surgery

Truss

Pad

7386125, A61B 806

Patent

active

050657640

ABSTRACT:
An ultrasonic Doppler blood flow velocity detection apparatus comprises: a signal producing circuit for producing trigger pulses, a sampling clock signal having a given phase relation with the trigger pulses, and a pair of quadrature signals of a given frequency in response to the trigger pulses. A transducer transmits also receives ultrasonic waves in response to the trigger pulses; The transducer also receives ultrasonic waves reflected back by an ultrasonic-wave reflective object and converts the received ultrasonic waves into an electric echo signal. A Doppler shift detection circuit, responsive to the pair of quadrature signals and the echo signal, detects the Doppler shift. An averaging circuit, responsive to the sampling clock, and the Doppler shift; averages plural time-different values of the Doppler shift, thereby producing a signal indicative of flow velocity of the ultrasonic-wave reflective object. The detection apparatus may further comprise a weighting circuit responsive to the output of the Doppler detection circuit and the sampling clock signal for weighting every value of the plural time-different values.

REFERENCES:
patent: 3798590 (1974-03-01), Jacobson et al.
patent: 4265126 (1981-05-01), Papadofrangakis et al.
patent: 4334543 (1982-06-01), Fehr
patent: 4612937 (1986-09-01), Miller
patent: 4751847 (1988-06-01), Katokura et al.
patent: 4883060 (1989-11-01), Pesque et al.
Medical Electronics vol. 11, No. 3 (1976) pp. 65-71.
Brandestini, M., "Topoflow-A Digital Full Range Doppler Velocity Meter", IEEE Transactions on Sonic and Ultrasonic vol. 5425 No. 5.

Affiliated with

Also associated with

Rating

Ultrasonic doppler blood flow velocity detection apparatus 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 doppler blood flow velocity detection apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultrasonic doppler blood flow velocity detection apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1363459