Figure 4.

63-year-old-woman (same patient in Figure 3) with pulmonary metastasis from CRC in the right upper lobe. (a) Axial CT before treatment (black arrow). (b) Cone-beam CT image obtained at the end of the procedure shows GGO (black arrow) around the treated lesion. (c,d) Axial 2-month follow-up CT images show an elongated consolidation with hypoattenuating bubbles (black arrow) and no contrast uptake (white arrow). (e,f) Axial 5-month follow-up CT images demonstrate a tiny nodular uptake of contrast on the posterior margin of the consolidation (white arrow), suggestive of residual disease. (g,h) On axial CT images after 8 months the nodular enhancement persists (white arrow). (i) PET/CT image at 9 months proves residual disease on the treated lesion (white arrow) as well as simultaneous metastasis (white arrowhead) in the posterior segment.