Real-Time Three-Dimensional Velocity Vector Measurement using the Weighted Phase Gradient Method
- 1 May 1998
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 37 (5S)
- https://doi.org/10.1143/jjap.37.3058
Abstract
Although the technique for measuring blood flow based on the ultrasonic Doppler method is an important means for clinical diagnosis, it is inappropriate for quantitative assessment of blood flow since the true three-dimensional (3-D) velocity component cannot be obtained in many cases. In this paper, to overcome the restriction, a new method of 3-D velocity vector measurement is proposed. By detecting the gradient of the weighted phase shift distribution on the receiving aperture, the proposed method enables us to employ a smaller single aperture compared with those used in conventional techniques, and its sensitivity is independent of the direction of transverse flow. Furthermore, real-time measurement can be realized since the autocorrelation technique is utilized for the phase shift extraction as well as the present Doppler method. The basic performance of the method is evaluated by computer simulation. Moreover, sector scan imaging is constructed by the proposed method and compared with the conventional method. The obtained results validated the feasibility and ability of the proposed method for measuring 3-D velocity.Keywords
This publication has 7 references indexed in Scilit:
- 3-D flow velocity vector estimation with a triple-beam lens transducer-experimental resultsIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 1997
- A method of ultrasonic 3-D computed velocimetryIEEE Transactions on Biomedical Engineering, 1997
- Experimental Investigation of 3-D Blood Flow Velocity MeasurementJapanese Journal of Applied Physics, 1996
- Ultrasonic vector velocity measurement by projection Computed VelocimetryIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 1995
- New Acoustic Meter for Measuring 3D Laboratory FlowsJournal of Hydraulic Engineering, 1994
- A novel method for angle independent ultrasonic imaging of blood flow and tissue motionIEEE Transactions on Biomedical Engineering, 1991
- Three-dimensional Doppler velocimetry of flow jetsIEEE Transactions on Biomedical Engineering, 1988