Figure 4

Temperature in the graft models, in the central plane aligned with the graft length, after 30 seconds of ultrasound exposure. 0.6 W of acoustic power was applied to the 1.5-MHz models with (a) no hyperplasia and (b) 1.2-mm of hyperplasia. 0.375 W was applied to the 3.2-MHz models with (c) no hyperplasia and (d) 1.2-mm of hyperplasia. With hyperplasia, 50°C was reached within the graft material for both transducers.