3D Imaging of the Trachea and Bronchi from Helical Scan CT.

概要

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The purpose of this study was to evaluate the clinical usefulness of three-dimensional (3D) images of the bronchi used on helical CT. Fourteen patients with lung cancer, 1 with tracheal diverticulum, and 1 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. Three-dimensional images were reconstructed using a CEMAX-VIPstation.<BR>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. Three-dimensional images of the bronchi using helical CT were useful in evaluating the changes of endobronchial lesions.
特定非営利活動法人日本肺癌学会の論文