Figure 2a. (a) Representative slice from single lesion demonstrates nonspherical crescent-shaped lesion treated with microwave ablation. (b) Representative slice from parallel lesion demonstrates slightly ovoid shape. Note that vessels (arrows) near the lesion edge create indentations in the treated lesion. (c) Representative slice from orthogonal lesion is more spherical than are single or parallel lesions. Note partially thrombosed vessel (arrow) near edge of lesion.