Figure 3. .

Transducer placement of low-intensity therapeutic ultrasound device compared with thermocouple placement in the posterior calf. A, with 1 transducer, the thermocouples were placed directly beneath the transducer, but with 2 transducers, B, the thermocouples were centered between the transducers at depths of 1.5 and 3.0 cm. However, given the placement of the 2 transducers and thermocouples, the distances from the acoustic source and thermocouples were 4.5 and 5.2 cm, respectively.