Figure 3a:

(a) Bar graph shows in vivo diameter, length,, and aspect ratio of dual-slot and monopole antennas at 100 W for 5 minutes. Dual-slot antenna created ablation zones that were significantly wider and more spherical than those created by using monopole antennas. This is consistent with trends found in power and treatment length in ex vivo tissue. * = significant difference (P < .05). (b) Sample intraprocedural images show microwave antenna placement in porcine liver. (c) Intraprocedural monitoring of ablation zone diameter, length, and aspect ratio during in vivo ablation with dual-slot and monopole antennas.