左肺动脉吊带的MSCT诊断

目的：评价MSCT在左肺动脉吊带（LPAS）诊断中的应用价值。方法：回顾性分析7例经手术证实的LPAS的临床表现及MSCT特征。结果：7例LPAS术前MSCT均正确诊断，7例均合并心内、外畸形。MSCI、及后处理（MPR、MIP、MinIP、VR）示：7例中完全性LPAS6例，表现为左肺动脉自右主肺动脉发出，从右主支气管上方绕行并向后走行至气管和食管间达左肺门；部分性LPAS1例，表现为左上肺动脉起自右主肺动脉，从右主支气管上方穿过。向后走行于气管和食管之间并供血左肺上叶，而左下肺动脉起源和走行正常；7例均伴不同程度的气管和／或支气管狭窄。结论：MSCT不仅能显示LPAS及其合并心血管畸形，还能显示LPAS伴随气管、支气管狭窄，对制定外科手术方案具有重要临床价值。

The multi-slice spiral CT in the diagnosis of left pulmonary artery sling

Objective： To evaluate the clinical value of multi-slice spiral CT （MSCT） in diagnosis of left pulmonary ar- tery sling （I.PAS）. Methods： MSCT findings and clinical manifestations of 7 patients with I.PAS, which were confirmed by surgery,were analyzed retrospectively. Results： All 7 cases of I.PAS were complicated with cardiac malformation and were correctly diagnosed by MSCT. 6 of the 7 cases were complete left pulmonary artery sling, the other one was partial left pul- monary artery sling. All cases had congenital cardiac malformations and various degrees of tracheal or/and bronchi~d steno- sis. Conclusions.. MSCT is an ideal imaging modality for identifying LPAS and associated tracheobronchial anomalies. It can provide useful information for surgical planning.