Figure 5
Radial contours of 40 kHz sonication with 0.23 W/cm2. (a) Threshold mechanical index in a 37 °C water environment at a 1.5 cm distance from the ultrasonic transducer, (b) threshold mechanical index in a 35–37 °C skin tissue at a distance of 0.1–0.5 cm. The color map represents the mechanical index range. Color change from blue to red determines an increase in the mechanical index range.
