Whyte R I, Quint L E, Kazerooni E A, Cascade P N, Iannettoni M D, Orringer M B
Department of Surgery, University of Michigan Medical Center, Ann Arbor, USA.
Ann Thorac Surg. 1995 Jul;60(1):27-30; discussion 30-1.
Helical computed tomography with multiplanar reconstruction (CT/MPR) was used to study proximal airway stenosis.
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.
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.
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.
采用螺旋计算机断层扫描及多平面重建（CT/MPR）技术研究近端气道狭窄。
对25例已知或疑似气管或主支气管狭窄的患者进行了28次螺旋CT/MPR检查。将计算机断层扫描结果与平面断层照片及气道的支气管镜评估结果进行比较。
CT/MPR能准确显示气管和主支气管狭窄的部位及程度，敏感性为93%，特异性为100%，准确性为94%。1例气管软化患者的检查结果为假阴性。在另1例患者中，气管蹼仅在非标准观察窗上可见。
CT/MPR能提供良好的解剖细节，且该技术应用日益广泛。潜在的缺点包括需要更长的屏气时间（15至45秒）以及与传统断层照片相比数据的复杂性增加。螺旋CT/MPR在这些患者的术前评估中很有用，并且随着经验的积累，可能会取代传统断层照片的使用。
