title: Measurement of two-dimensional blood velocity vectors by the ultrasonic speckle projection technique.
abstract: A technique has been developed for measuring the two in-plane components of blood velocity using ultrasound. The principle is based on analyzing a time sequence of successive images of the speckle pattern, and forming spatial projections of the resulting three-dimensional data set. The mathematics may be understood in terms of sections through a three-dimensional Fourier transform of the original data. The technique has been tested with data from a computer-controlled scanner using a tissue-mimicking phantom, and with data from a commercial ultrasound scanner using images of flowing blood in a jugular vein. In both cases, velocity vectors with many different orientations were measured, demonstrating the feasibility of the method. A less restrictive real-time implementation is suggested.
authors.affiliation: Ultrasonics Laboratory, CSIRO Division of Radiophysics, Chatswood NSW, Australia.
authors.forename: L S
authors.initials: LS
authors.lastname: Wilson
authors.forename: R W
authors.initials: RW
authors.lastname: Gill
mesh_terms: D001783:Blood Flow Velocity; D005583:Fourier Analysis; D006801:Humans; D008961:Models, Structural; D014463:Ultrasonography / Q000379:methods*