Experimental Verification of Modeled Thermal Distribution Produced by a Piston Source in Physiotherapy Ultrasound

Figure 4

Ultrasonic image of the thermocouples into the phantom at 7 cm from the transducer; the thermocouple is shown as a clear zone followed by a dark shadow. The position of each thermocouple was determined by using these images along the insertion route, and it was verified by splitting the phantom at the end of the experiment.