Figure 5

Temperatures along the direction of ultrasound propagation, through the center of the ultrasound focal zone. Temperature along the direction of ultrasound propagation through the center of the ultrasound focal zone after 0, 5, and 30 seconds of ultrasound exposure. The 1.5-MHz transducer models are shown in (a) and (b). The 3.2-MHz transducer models are shown in (c) and (d). After 30 seconds, the simulations showed a temperature of approximately 50°C in the graft walls for models (b) and (d) with 1.2-mm thick intimal hyperplasia.