Fig. 11
From: Image-guided percutaneous ablation for the treatment of lung malignancies: current state of the art
"Iceball" formation while performing an image-guided percutaneous lung CA. a CT of a patient with oligometastatic disease due to a small cell renal carcinoma with a lesion near the descending thoracic aorta (arrow). b CT-guided CA of this lesion, given the lesion's small size, it was possible to use a single straight probe placed in the center of the lesion (arrow). Note the hypodense halo surrounding the lesion, consistent with the “ice ball” formed during treatment (triangle). c Non-contrast CT scan one month after treatment. The treated area shows a larger size than the original lesion (arrow). However, it is a rounded area of similar size to the image immediately after treatment (not available). d Non-contrast CT scan six months after treatment. A lung scar is now observed in the treated area, consistent with effective treatment (arrow)