Improved technique for Doppler angle correction by monitoring the vessel diameter

Eduardo Jorge Valadares Oliveira; Vera Lucia da Silveira Nantes Button; Joaquim Miguel Maia; Eduardo Tavares Costa; Jorge André G. Albuquerque

doi:10.1117/12.479895

23 May 2003 Improved technique for Doppler angle correction by monitoring the vessel diameter

Eduardo Jorge Valadares Oliveira, Vera Lucia da Silveira Nantes Button, Joaquim Miguel Maia, Eduardo Tavares Costa, Jorge André G. Albuquerque

Author Affiliations +

Proceedings Volume 5035, Medical Imaging 2003: Ultrasonic Imaging and Signal Processing; (2003) https://doi.org/10.1117/12.479895
Event: Medical Imaging 2003, 2003, San Diego, California, United States

Abstract

The Doppler velocimeter developed allows determining the angle between the ultrasonic beam and the velocity vector of the flow, and utilizes this angle to calculate the blood flow in a vessel. Four piezoelectric transducers constitute the Doppler velocimeter. Three of these transducers are positioned to form an equilateral triangle (base of a pyramid). When these transducers move simultaneously, backward or forward from the initial position, the emitted ultrasonic beams focalize on a position (peak of the pyramid) closer or farther from the transducers faces, according to the depth of the vessel where we intend to measure de flow. The angle between the transducers allows adjusting the height of this pyramid and the position of the focus (where the three beams meet). A forth transducer is used to determine the diameter of the vessel and monitor the position of the Doppler velocimeter relative to the vessel. The results showed that with this technique it is possible to accomplish measurement of blood flow and to reduce Doppler measurements subjectivity.

Citation Download Citation

Eduardo Jorge Valadares Oliveira, Vera Lucia da Silveira Nantes Button, Joaquim Miguel Maia, Eduardo Tavares Costa, and Jorge André G. Albuquerque "Improved technique for Doppler angle correction by monitoring the vessel diameter", Proc. SPIE 5035, Medical Imaging 2003: Ultrasonic Imaging and Signal Processing, (23 May 2003); https://doi.org/10.1117/12.479895

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