CT measurement of main pulmonary artery diameter
CT measurement of main pulmonary artery diameter
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DOI：
10.1259/bjr.71.850.10211060
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发表时间：
1998-10-01
影响因子：
2.6
通讯作者：
Coulden, R
中科院分区：
文献类型：
--
作者：
Edwards, PD;Bull, RK;Coulden, R
本研究的目的是使用现代CT系统确定正常主肺动脉直径的上限。这是在100名正常受试者的肺动脉分叉水平上测量的，使用固定纵隔窗设置下观察的未增强连续10 mm CT切片（400/20）。然后将这些正常受试者与来自12名经证实的肺动脉高压患者（平均肺动脉压>20 mmHg）的类似未增强10 mm图像进行比较。正常人主肺动脉直径为2.72cm（SD=0.3）。肺动脉高压患者的主肺动脉直径显著大于（p < 0.01），为3.47 cm（SD = 0.33）。肺动脉直径3.32 cm（主肺动脉直径+2 SD）对肺动脉高压的敏感性为58%，特异性为95%。结果表明：10 mm轴位CT平扫，正常肺动脉主干直径的上限为3.32 cm。如果患者的数值高于该水平，则应考虑肺动脉高压。
The aim of this study was to determine the upper limit of the normal main pulmonary artery diameter using a modern CT system. This was measured at the level of the pulmonary artery bifurcation in 100 normal subjects using unenhanced contiguous 10 mm CT slices viewed at fixed mediastinal window settings (400/20). These normal subjects were then compared with similar unenhanced 10 mm images from 12 patients with proven pulmonary arterial hypertension (mean pulmonary artery pressure>20 mmHg). The main pulmonary artery diameter in normal subjects was 2.72 cm (SD=0.3). Main pulmonary artery diameter in patients with pulmonary arterial hypertension was significantly greater (p < 0.01) at 3.47 cm (SD = 0.33). A pulmonary artery diameter of 3.32 cm (main pulmonary artery diameter +2 SD) had a 58% sensitivity and 95% specificity for the presence of pulmonary arterial hypertension. It is concluded that, using unenhanced axial 10 mm CT sections, the upper limit of normal main pulmonary artery diameter is 3.32 cm. Pulmonary arterial hypertension should be considered in patients with values above this level.