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CT Imaging Findings of Pulmonary Neoplasms After Treatment with Radiofrequency Ablation: Results in 32 Tumors

¹ All authors: Department of Diagnostic Imaging, Rhode Island Hospital, Brown Medical School, 593 Eddy St., Providence, RI 02903.

View larger version (106K): [in a new window]   Fig. 1A —91-year-old man with adenocarcinoma of left upper lobe. Axial CT image through lungs shows left upper lobe neoplasm before radiofrequency ablation (RFA).

View larger version (101K): [in a new window]   Fig. 1B —91-year-old man with adenocarcinoma of left upper lobe. Axial CT image obtained 2 months after RFA shows cavitation within previously treated neoplasm (arrow).

View larger version (95K): [in a new window]   Fig. 1C —91-year-old man with adenocarcinoma of left upper lobe. Contrast-enhanced CT image obtained 2 months after RFA shows small focus of enhancement posteriorly within neoplasm (arrow).

View larger version (98K): [in a new window]   Fig. 1D —91-year-old man with adenocarcinoma of left upper lobe. Axial CT image obtained 10 months after RFA shows contraction of cavity.

View larger version (83K): [in a new window]   Fig. 1E —91-year-old man with adenocarcinoma of left upper lobe. Axial CT image obtained 26 months after RFA shows growth of neoplasm.

View larger version (98K): [in a new window]   Fig. 1F —91-year-old man with adenocarcinoma of left upper lobe. CT fluoroscopic image shows retreatment of left upper lobe neoplasm using cluster electrode (arrow).

View larger version (132K): [in a new window]   Fig. 2A —81-year-old woman with squamous cell carcinoma of lung. CT fluoroscopic image with patient in right lateral decubitus position shows single electrode in left pleural tumor (arrow).

View larger version (116K): [in a new window]   Fig. 2B —81-year-old woman with squamous cell carcinoma of lung. CT image obtained 1 month after radiofrequency ablation shows multiple small bubble lucencies (arrow) in treated neoplasm.

View larger version (109K): [in a new window]   Fig. 3A —57-year-old man with melanoma metastatic to right lung. CT fluoroscopic image shows cluster electrode in right lung metastasis (arrow) that is adjacent to right upper lobe bronchus.

View larger version (112K): [in a new window]   Fig. 3B —57-year-old man with melanoma metastatic to right lung. Axial CT image immediately after radiofrequency ablation (RFA) shows circumferential rim of ground-glass opacity surrounding neoplasm (arrow).

View larger version (96K): [in a new window]   Fig. 3C —57-year-old man with melanoma metastatic to right lung. Axial CT image obtained 1 month after RFA shows cavitation of treated tumor (arrow) and adjacent pleural thickening (arrowhead).

View larger version (93K): [in a new window]   Fig. 3D —57-year-old man with melanoma metastatic to right lung. Axial CT image obtained 6 months after RFA shows resolution of previously visualized cavitation and enlargement of lesion.

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