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. Author manuscript; available in PMC: 2012 Mar 1.
Published in final edited form as: Ultrasound Med Biol. 2011 Jan 26;37(3):484–492. doi: 10.1016/j.ultrasmedbio.2010.12.005

Fig. 2.

Fig. 2

(A) Photograph of the 128-element PPA assembly without the aluminum enclosure. (B) Photograph of the finished PPA in an aluminum enclosure. (C) Photograph of the 128-channel preamplifier board. (D) Photograph of the finished custom probe with the PPA connected directly to the preamplifier board in an aluminum enclosure.