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Images of the fabrication steps of a custom catheter hydrophone. (A) indicates a 0.5 × 0.5 × 0.3 mm PZT-5 crystal soldered between the leads of a (B) 1.77 mm OD coaxial cable. (C) shows the crystal-cable assembly after coating the tip with epoxy (D) shows the clinical drainage catheter. (E) displays the final assembly of the catheter hydrophone.
