title: Three-dimensional display of the bronchi using helical CT.
abstract: The purpose of this study was to evaluate the clinical usefulness of three-dimensional (3D) images of the bronchi obtained using helical CT. Thirteen patients with lung cancer, one with tracheal diverticulum, and one with bronchial amyloidosis were examined. The CT scanner employed was the Toshiba Xforce. The helical CT scan cycle consisted of 20 continuous rotations, each requiring 1.5 sec, for a total scanning time of 30 sec. Scans were obtained using a 5-mm X-ray beam width, a 5-mm/1.5 sec couchtop sliding speed, and a 2-mm reconstruction interval. 3D images were reconstructed using a CEMAX VIPstation. The optimal lower and upper threshold CT values for 3D images of the bronchi were -650 and -100 HU, respectively, and 3D images clearly depicted endobronchial lesions. Cartilage crescents were also demonstrated, but longitudinal and circular mucosal folds could not be visualized. In conclusion, 3D images of the bronchi acquired using helical CT were useful in evaluating endobronchial lesions.
authors.affiliation: Department of Radiology, Osaka Medical College, Takatsuki, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Shimizu
authors.forename: I
authors.initials: I
authors.lastname: Narabayashi
authors.forename: Y
authors.initials: Y
authors.lastname: Ogura
authors.forename: Y
authors.initials: Y
authors.lastname: Uesugi
authors.forename: K
authors.initials: K
authors.lastname: Tabuchi
authors.forename: R
authors.initials: R
authors.lastname: Namba
authors.forename: Y
authors.initials: Y
authors.lastname: Nakata
authors.forename: R
authors.initials: R
authors.lastname: Matsui
authors.forename: K
authors.initials: K
authors.lastname: Sueyoshi
authors.forename: T
authors.initials: T
authors.lastname: Kawai
mesh_terms: D000328:Adult; D000368:Aged; D000686:Amyloidosis / Q000000981:diagnostic imaging; D001982:Bronchial Diseases / Q000000981:diagnostic imaging; D001984:Bronchial Neoplasms / Q000000981:diagnostic imaging; D016084:Bronchoconstriction; D001995:Bronchography; D002356:Cartilage / Q000000981:diagnostic imaging; D003251:Constriction, Pathologic / Q000000981:diagnostic imaging; D004240:Diverticulum / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D008875:Middle Aged; D009092:Mucous Membrane / Q000000981:diagnostic imaging; D011237:Predictive Value of Tests; D014057:Tomography, X-Ray Computed / Q000379:methods; D014133:Tracheal Diseases / Q000000981:diagnostic imaging