To quantitatively study the anatomic structure of pulmonary vein (PV) by MSCT venography (MSCTV). Method Totally 500 patients who underwent 256-slice CT coronary artery and had negative results were retrospectively analyzed. The raw CT data and reconstructed PV images data were collected, then ventricular early diastolic and ventricular early systole phases were confirmed, the diameters of PV were measured, the types of anatomical variance of PV were calculated. Results There were four types of pulmonary vein, type I (443/500, 88.60%), type II (17/500, 3.40%), type HI (4/500, 0.80%), type IV (36/500, 7.20%). The size and shape of PV varied during cardiac cycles. The maximal size of PV was generally at early diastolic phase, while the minimal size at ventricular early systole phase(P< 0. 05). Conclusion MSCTV of pulmonary vein can noninvasively provide precise information of pulmonary vein anatomy, therefore guiding ablation and thoracic surgery.%目的 采用MSCT肺静脉成像对肺静脉进行定量观察.方法 选择冠状动脉CTA结果正常的500例患者的影像资料,收集心脏原始图像及肺静脉后处理图像,确定心室舒张早期及收缩早期,测量不同时相各肺静脉径线,统计各肺静脉解剖类型、变异及分型.结果 4种肺静脉类型中,Ⅰ型443例(443/500,88.60％),Ⅱ型17例(17/500,3.40％),Ⅲ型4例(4/500,0.80％),Ⅳ型36例(36/500,7.20％).同一心动周期不同时相肺静脉形态及径线不同,在心室舒张早期时最大,而在心室收缩早期时最小(P均＜0.05).结论 MSCT肺静脉成像能准确、无创地提供肺静脉的解剖信息,有利于指导临床治疗.
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