Figure 17
Dynamic changes of Δ α 0 in ex vivo porcine muscle tissue during HIFU treatment. Δα0 values were estimated by spatially averaging the Δα0 values axially and laterally in the region of interest (10 mm × 10 mm) centered around the lesion generated by HIFU as shown in Figure 8. The duty cycle was 77%, resulting in TAP of 49 W and average focal intensity of 1,068 W/cm2 at the HIFU treatment site, for a total HIFU treatment time of 40 s.