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Summation of CT Scans During Radiofrequency Ablation for Assessing Target Lesion Coverage

¹ Department of Radiology, CT Scan Division, Dartmouth-Hitchcock Medical Center, Lebanon, NH.
² Department of Radiology, Division of Vascular and Interventional Radiology, Dartmouth-Hitchcock Medical Center, One Medical Center Dr., Lebanon, NH 03756.

OBJECTIVE. In radiofrequency ablation of lesions that require probe repositioning, distinguishing between treated and untreated regions can be difficult. We describe a method of using existing CT equipment to summate images of a current probe placement with those of earlier placements or scans of transiently enhancing targets.

CONCLUSION. Summation of CT scans during radiofrequency ablation involving multiple probe placements is feasible and results in a better appreciation of probe positioning relative to the target lesion.

Keywords: CT • CT scan • CT summation • probe placement • radiofrequency ablation

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