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Ann Thorac Surg 1995;60:27-30
© 1995 The Society of Thoracic Surgeons

Helical Computed Tomography for the Evaluation of Tracheal Stenosis

Section of Thoracic Surgery, Department of Surgery, and Department of Radiology, The University of Michigan Medical Center, Ann Arbor, Michigan

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.

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Discussion
Ann. Thorac. Surg. 1995 60: 30-31. [Extract] [Full Text]

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