title: Helical computed tomography for the evaluation of tracheal stenosis.
abstract: BACKGROUND
  Helical computed tomography with multiplanar reconstruction (CT/MPR) was used to study proximal airway stenosis.
  
  
  METHODS
  Twenty-eight helical CT/MPR studies were obtained in 25 patients with known or suspected stenosis of the trachea or main bronchi. Computed tomographic results were compared with planar tomograms and bronchoscopic evaluation of the airway.
  
  
  RESULTS
  CT/MPR accurately demonstrated the site and degree of tracheal and main bronchial stenoses with a sensitivity of 93%, a specificity of 100%, and an accuracy of 94%. There was one false negative study in a patient with tracheomalacia. In a second patient, a tracheal web was only apparent on nonstandard viewing windows.
  
  
  CONCLUSIONS
  CT/MPR provides good anatomic detail and is an increasingly available technique. Potential drawbacks include the need for a longer breath-hold (15 to 45 seconds) and increased complexity of data compared with conventional tomograms. Helical CT/MPR is useful in the preoperative evaluation of these patients and, as experience accumulates, may replace the use of conventional tomograms.
authors.affiliation: Department of Surgery, University of Michigan Medical Center, Ann Arbor, USA.
authors.forename: R I
authors.initials: RI
authors.lastname: Whyte
authors.forename: L E
authors.initials: LE
authors.lastname: Quint
authors.forename: E A
authors.initials: EA
authors.lastname: Kazerooni
authors.forename: P N
authors.initials: PN
authors.lastname: Cascade
authors.forename: M D
authors.initials: MD
authors.lastname: Iannettoni
authors.forename: M B
authors.initials: MB
authors.lastname: Orringer
mesh_terms: D001982:Bronchial Diseases / Q000000981:diagnostic imaging; D001999:Bronchoscopy; D003251:Constriction, Pathologic; D006801:Humans; D011300:Preoperative Care; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods; D014132:Trachea / Q000000981:diagnostic imaging*; D014135:Tracheal Stenosis / Q000000981:diagnostic imaging* / Q000601:surgery