Ultrasonic Doppler diagnostic device

Details Ultrasonic Doppler diagnostic device Ultrasonic Doppler diagnostic device

1985-03-28

1987-03-24

Howell, Kyle L.

Surgery

Truss

Pad

7386125, A61B 1000

Patent

active

046517421

ABSTRACT:
An ultrasonic diagnostic device for measuring the velocity of blood flow within a living body comprises a receiver for amplifying a received wave in accordance with a logarithmic amplification characteristic and at least one inverse logarithmic converter which produces an output having an inverse logarithmic characteristic with respect to the input thereto. As a result, the device can carry out high-precision measurement of blood flow even when the component of the received wave corresponding to the blood flow is much smaller than a component of the received wave corresponding to the wall of the blood vessel or heart through which the blood is flowing.

REFERENCES:
patent: 4145741 (1979-03-01), Nappin
patent: 4289140 (1981-09-01), Carpenter et al.
patent: 4543826 (1985-10-01), Ferrari
Baker, D. W., "Pulsed Ultrasonic Doppler Blood Flow Sensing" IEEE Transactions on Sonics & Ultrasonics, vol. Su-17, No. 3, Jul. 1970.

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