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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. 17.

Fig. 17

The coordinate system of an ultrasound beam uθ, ϕ generated by 2-D linear array with beam steering angle θ in the xz-plane, which is equal to angle NAO and PAM, and beam steering angle ϕ in the yz-plane, which is equal to MAO and PAN.