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Fig. 2D. —74-year-old woman with lung metastases from colorectal carcinoma. CT scan obtained 1 month after radiofrequency ablation shows tumoral lesion to be fully cavitated with reparative hyperemic hyperdense envelope. Areas labeled 1 and 2 were printed during CT process and refer to attenuation. Area 1 indicates the cavitated area with a densitometric value of–886 H. Area 2 indicates surrounding hyperdense ring with a densitometric value of 33 H. Note that envelope encompasses more dorsal branch of right superior pulmonary vein (arrow), which is partially surrounded by necrotic tissue originating from fragmentation of treated nodule.