Figure 2.

(a) For modeling purposes, the cylindrical surface of the simulated SonoKnife transducer was composed of an array of small rectangles whose dimensions are comparable to the wavelength. (b) Photograph of the prototype PZT-8 ultrasound transducer used in experiments with an operating frequency of 3.5 MHz, a radius of curvature (R) of 60 mm, a width (r) of 60 mm, and a length (L) of 30 mm. The mount was machined out of Plexiglas.