title: Summation of CT scans during radiofrequency ablation for assessing target lesion coverage.
abstract: 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.
authors: Department of Radiology, CT Scan Division, Dartmouth-Hitchcock Medical Center, Lebanon, NH 03756, USA.
authors: Pamela M
authors: PM
authors: Mazurek
authors: Anne M
authors: AM
authors: Silas
authors: John M
authors: JM
authors: Gemery
mesh_terms: 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*