Department of Radiology, Faculty of Medicine, Hacettepe University, Sıhhiye, 06100, Ankara, Turkey.
Surg Radiol Anat. 2020 Nov;42(11):1279-1285. doi: 10.1007/s00276-020-02493-9. Epub 2020 May 13.
Previous studies have shown a correlation between axial pulmonary trunk diameter (PTD) on chest computed tomography (CT) and pulmonary artery pressure. However, it is not known whether the PTD slices measured on chest CT have been recorded during the systolic or diastolic phase. The aim of this study was to demonstrate the variations in PTD during the cardiac cycle by measuring coronary CT angiography (CCTA) images.
A retrospective analysis was made of 101 patients who underwent CCTA for coronary artery disease assessment. CCTA images were reconstructed during a full cardiac cycle and measurements were taken of the systolic and diastolic PTD and ascending aorta diameter (AAD) from the same slice by two independent observers.
Inter-observer agreement was excellent (intraclass correlation coefficient = 0.99) for all CT measurements. The mean systolic PTD of all patients was 26.3 ± 3.6 mm and the mean diastolic PTD was 22.8 ± 3.2 mm (p < 0.001). The mean difference between systole and diastole was found to be 3.5 ± 1.2 mm for PTD, 1.2 ± 0.7 mm for AAD, and 0.1 ± 0.04 for the PTD/AAD ratio (p values < 0.001). There was no statistical significance of PTD variations according to gender, age, height, weight, body mass index, and body surface area.
When an increased PTD is detected in a chest CT compared to normal limits or a previous CT scan, this may be the result of the variation in PTD due to the cardiac cycle.
先前的研究表明，胸部计算机断层扫描（CT）上的轴向肺动脉主干直径（PTD）与肺动脉压之间存在相关性。然而，尚不清楚在胸部 CT 上测量的 PTD 切片是在收缩期还是舒张期记录的。本研究旨在通过测量冠状动脉 CT 血管造影（CCTA）图像来证明 PTD 在心动周期中的变化。
对 101 例因冠心病行 CCTA 评估的患者进行回顾性分析。CCTA 图像在整个心动周期重建，并由两名独立观察者从同一切片测量收缩期和舒张期 PTD 以及升主动脉直径（AAD）。
所有 CT 测量的观察者间一致性均极好（组内相关系数=0.99）。所有患者的平均收缩期 PTD 为 26.3±3.6mm，平均舒张期 PTD 为 22.8±3.2mm（p<0.001）。PTD、AAD 和 PTD/AAD 比值的收缩期与舒张期差值分别为 3.5±1.2mm、1.2±0.7mm 和 0.1±0.04（p 值均<0.001）。PTD 变化的性别、年龄、身高、体重、体重指数和体表面积无统计学意义。
与正常范围或以前的 CT 扫描相比，胸部 CT 上检测到 PTD 增加时，这可能是由于心动周期引起的 PTD 变化所致。
