title: Percutaneous radiofrequency ablation of osteoid osteomas with use of real-time needle guidance for accurate needle placement: a pilot study.
abstract: OBJECTIVE
  To evaluate the accuracy and technical success of positioning a radiofrequency ablation (RFA) electrode in osteoid osteomas by use of a new real-time needle guidance technology combining cone-beam computed tomography (CT) and fluoroscopy.
  
  
  METHODS
  Percutaneous RFA of osteoid osteomas was performed in five patients (median age 18 years), under general anesthesia, with the use of cone-beam CT and fluoroscopic guidance for electrode positioning. The outcome parameters were technical success, meaning correct needle placement in the nidus; accuracy defined as the deviation (in mm) from the center of the nidus; and clinical outcome at follow-up.
  
  
  RESULTS
  In all five cases, positioning was possible within 3 mm of the determined target location (median nidus size 6.8 mm; range 5-10.2 mm). All procedures were technically successful. All patients were free of pain at clinical follow-up. No complications were observed.
  
  
  CONCLUSIONS
  Real-time fluoroscopy needle guidance based on cone-beam CT is a useful tool to accurately position radiofrequency needles for minimally invasive treatment of osteoid osteomas.
authors.affiliation: Department of Radiology, Radboud University Nijmegen Medical Centre, PO Box 9101, 6500 HB, Nijmegen, The Netherlands. w.busser@rad.umcn.nl
authors.forename: Wendy M H
authors.initials: WM
authors.lastname: Busser
authors.forename: Yvonne L
authors.initials: YL
authors.lastname: Hoogeveen
authors.forename: Rene P H
authors.initials: RP
authors.lastname: Veth
authors.forename: H W Bart
authors.initials: HW
authors.lastname: Schreuder
authors.forename: Angelique
authors.initials: A
authors.lastname: Balguid
authors.forename: W KlaasJan
authors.initials: WK
authors.lastname: Renema
authors.forename: Leo J
authors.initials: LJ
authors.lastname: Schultzekool
mesh_terms: D000293:Adolescent; D001859:Bone Neoplasms / Q000000981:diagnostic imaging / Q000601:surgery*; D017115:Catheter Ablation / Q000295:instrumentation*; D002675:Child, Preschool; D054893:Cone-Beam Computed Tomography; D005260:Female; D005471:Fluoroscopy; D006801:Humans; D008297:Male; D008875:Middle Aged; D009339:Needles; D010017:Osteoma, Osteoid / Q000000981:diagnostic imaging / Q000601:surgery*; D015641:Radiography, Interventional; D016896:Treatment Outcome