title: A compact laser beam guidance system for interventional CT.
abstract: OBJECTIVE
  We propose a simple, compact, and accurate light guidance system for interventional CT.
  
  
  METHODS
  The system using intersecting laser beams is mounted on the CT gantry and ensures precise needle guidance even when the gantry is tilted. The device does not require additional software/hardware.
  
  
  RESULTS
  Phantom simulations and clinical experiments have demonstrated an accuracy of +/- 1 degrees and +/- 1 mm.
  
  
  CONCLUSIONS
  The laser guidance system for CT makes the intervention safer, faster, and more accurate.
authors.affiliation: Department of Radiology B, University Hospital of Strasbourg, France.
authors.forename: A
authors.initials: A
authors.lastname: Gangi
authors.forename: B
authors.initials: B
authors.lastname: Kastler
authors.forename: J M
authors.initials: JM
authors.lastname: Arhan
authors.forename: A
authors.initials: A
authors.lastname: Klinkert
authors.forename: J M
authors.initials: JM
authors.lastname: Grampp
authors.forename: J L
authors.initials: JL
authors.lastname: Dietemann
mesh_terms: D001707:Biopsy, Needle / Q000295:instrumentation / Q000379:methods; D004867:Equipment Design; D006801:Humans; D007834:Lasers; D008961:Models, Structural; D015641:Radiography, Interventional / Q000295:instrumentation / Q000379:methods*; D014057:Tomography, X-Ray Computed / Q000295:instrumentation / Q000379:methods*