64层螺旋CT对肺静脉的形态定量分析

Morphometric analysis of the pulmonary vein with 64-slice CT

目的用64层螺旋CT定量分析肺静脉直径、截面积及形状。方法分析102例病人,除外影响肺静脉疾病者,进行心脏冠状动脉增强螺旋CT扫描。在工作站用肺静脉血管分析软件,测量4条肺静脉主干的直径(平均直径,最大值,最小值)及截面积。比较男女之间肺静脉直径、截面积和圆率的差异性、4条肺静脉圆率的差异性及4条肺静脉年龄分组的差异性。结果4条肺静脉口平均直径变化较大,右上肺静脉口直径为20.3 mm,右下肺静脉口直径为17.0 mm,左上静脉口直径为18.1 mm,左下肺静脉口直径为13.9 mm。右下肺静脉的平均直径和截面积在男女之间有明显统计学差异性(P值分别为0.022和0.017),肺静脉皆不是完全的圆形,右下肺静脉圆度最大,左下肺静脉圆度、直径和截面积最小(P≈0.000<0.05),4条肺静脉皆由细逐渐增粗进入左心房。左侧肺静脉的平均直径和截面积在年龄分层上有统计学差异(P=0.01及0.008)。结论肺静脉的直径、截面积及形状变化较大,在评估肺静脉狭窄时应特别注意。64层螺旋CT可以无创性地评估肺静脉。

Objective To quantitatively analyze the diameter, cross-sectional area and shape of pulmonary vein with 64- slice CT. Methods One hundred and two patients without pulmonary disease were involved in this study. Enhanced spiral coronary artery CT were performed. The diameter and cross-sectional area of four major pulmonary veins were measured at the workstation with pulmonary vessel analysis software. A comparison was made between men and women about the following parameters： the distribution of diameters, surface areas and roundness. The difference of the roudness among the four main pulmonary veins was also quantitatively analyzed. A comparison also was made with age about the diameters and surface areas. Results The mean diameter of the 4 main pulmonary vein at the ostia was variable with the right superior 20.3 mm, right inferior 17.0 mm, left superior 18.1 mm; left inferior 13.9 mm. The diameter and cross-sectional area of the right inferior pulmonary vien in men were singificantly larger than those in women （P=0. 022 and 0. 017）. No pulmonary vein was round. The left side veins and venous ostia were less round than the right side. The roundness of left inferior plumonary vein was minimum （P≈0. 000〈0.05）. The diameter and cross-sctional area of the left pulmonary veins were different in age （P〈0.01）. Conclusion Pulmonary vein diameter, cross-sectional area and shape are vary. 64-slice CT can be used to visualize clearly and evaluate the plumonary vein.