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Fig. 3B —Group D: swine sacrificed 4 weeks after radiofrequency ablation. CT image shows slice of ablated lesion tissue presented in A with obstructive pneumonitis. Ablated lesion observed on CT is larger than ablated lesion seen at macroscopic examination. Pale lesion only in periphery of ablated areas plus ablated lesion on macroscopic examination is observed as wedge-shaped high-density masslike lesion (arrows).