Summation of CT scans during radiofrequency ablation for assessing target lesion coverage.
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.


CONCLUSIONS
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.
Mazurek
Pamela M
PM
Department of Radiology, CT Scan Division, Dartmouth-Hitchcock Medical Center, Lebanon, NH 03756, USA.
Silas
Anne M
AM
Gemery
John M
JM
D000369:Aged, 80 and over; D017115:Catheter Ablation / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009369:Neoplasms / Q000000981:diagnostic imaging* / Q000601:surgery*; D015641:Radiography, Interventional / Q000379:methods*; D013382:Subtraction Technique; D025321:Surgery, Computer-Assisted / Q000379:methods*; D014057:Tomography, X-Ray Computed / Q000379:methods*