Method for detecting two-dimensional flow for ultrasound color f

Details Method for detecting two-dimensional flow for ultrasound color f Method for detecting two-dimensional flow for ultrasound color f

1993-08-30

1995-03-14

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Echo systems

Speed determination

12866108, 7386125, G01F 166, A61B 806

Patent

active

053982169

ABSTRACT:
A triangulation method and apparatus for measuring the velocity of a flowing material at a point of interest along two lines of sight which have different vector components. The flow velocity along two different image vectors is measured simultaneously by separately processing the signals from left and right reception apertures (14, 16). In one case, the positions of the reception apertures are held constant and conventional dynamic focussing on receive is used to steer the apertures to follow the transmitted energy as a function of range depth. In an alternative case, the transducers included in each reception aperture are dynamically reassigned in order to maintain a fixed triangulation angle. In this case a reception aperture shifts away from the transmission aperture (12) to track the received backscattered ultrasonic energy at a constant triangulation angle.

REFERENCES:
Tamura et al., "Quantitative Study of Steady Flow Using Color Doppler Ultrasound", Ultrasound in Med. & Biol., vol. 17, No. 6 (1991).
Overbeck et al., "Vector Doppler: Accurate Measurement of Blood Velocity in 2-D", Ultrasound in Med. & Biol., vol. 18, No. 1 (1992), pp. 19-31.
Vera et al., "Visualization of Complex Flow Fields etc.", vol. 18, No. 1 (1992), pp. 1-9.

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