Figure 11.
Compilation of lethal contours (240 EM43°C) for endoluminal soft tissue ablation for 30 s sonications as a function of reflector geometry and number of cylindrical transducer array elements (1.5 MHz, 10 mm OD, 20 mm length, 8 or 16 array elements). Contours are shown only for applied phase settings resulting in selective, singular thermal lesions, with no substantial secondary hotpots, thus demonstrating the effective steering range for each transducer array – reflector pairing. Each colored contour represents distinct phase settings and focal pattern, with the target focal depth (mm) for the applied phase settings color coordinated according to the legend. Abbreviations: C – conical reflector, P – paraboloid reflector, E – array elements.