Figure 9.

Performance metrics for acoustic simulations comparing a select configuration of the deployable applicator assembly (8 elements, 10 mm OD × 20 mm length 1.5 MHz cylindrical array, 40 mm FL paraboloid balloon reflector) with concentric-ring arrays A and B, both with 8 elements and dimensions comparable to the balloon reflector assembly (C-R Array A: 10/46.3 mm ID/OD, C-R array B: 14/42.3 mm ID/OD). Metrics include a) peak focal intensity, normalized by input acoustic power, b) individually normalized intensity gain curves, c) secondary-to-primary intensity ratio as a measure of beam focusing selectivity, and d) axial FWHM of focus as indicator of focal dimensions, all as a function of depth.