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. Author manuscript; available in PMC: 2006 Mar 17.
Published in final edited form as: IEEE Trans Med Imaging. 2004 Dec;23(12):1479–1489. doi: 10.1109/TMI.2004.835604

Fig. 2.

Fig. 2

An actual displacement vector d at point O, observed by an ultrasound beam uθ in an RF frame with beam steering angle θ The product of the displacement vector d and the unit vector in the θ direction is designated by the line OA, which is equal to dz cos θ + dx sin θ, where dz and dx are the component of the displacement vector d in the z and x directions, respectively.