title: [CT-guided intervention by means of a laser marking and targeting aid].
abstract: OBJECTIVE
  The present study evaluates the use of a laser guidance system for CT-guided intervention.
  
  
  METHODS
  94 cases of diagnostic biopsies and lumbar sympathectomies (54 cases with laser guidance system and 40 without) were compared.
  
  
  RESULTS
  Using the laser guidance system, the number of control scans decreased by 30 to 50%, and necessary corrections of needle location were reduced by a maximum of 30%. The average target deviation of the needle decreased to less than 5 mm in 50% of cases.
  
  
  CONCLUSIONS
  The laser guidance system is strongly recommended in CT-guided interventions for quality assurance and higher efficiency. The advantage is especially marked if the target area is small.
authors.affiliation: Zentrum für Radiologie, Universitätsklinikum Leipzig.
authors.forename: R
authors.initials: R
authors.lastname: Klöppel
authors.forename: W
authors.initials: W
authors.lastname: Wilke
authors.forename: T
authors.initials: T
authors.lastname: Weisse
authors.forename: R
authors.initials: R
authors.lastname: Steinecke
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001707:Biopsy, Needle / Q000379:methods; D002648:Child; D005260:Female; D006801:Humans; D007834:Lasers; D008160:Lumbosacral Plexus / Q000601:surgery; D008297:Male; D008875:Middle Aged; D019047:Phantoms, Imaging; D015641:Radiography, Interventional / Q000295:instrumentation / Q000379:methods*; D013562:Sympathectomy / Q000379:methods; D014057:Tomography, X-Ray Computed / Q000295:instrumentation / Q000379:methods*