多层螺旋CT在儿童肺隔离症诊断中的应用

目的 探讨多层螺旋CT在肺隔离症诊断中的应用价值.方法 回顾性分析18例经手术病理证实为肺隔离症患儿的多层螺旋CT表现.所有患儿均行CT平扫及增强检查,并行图像后处理.评价各重组方法对肺隔离症及其相关畸形的诊断价值.结果 增强扫描横断面发现异常供血动脉12例,不能确定6例.经多种重组方法处理图像可直观显示全部异常供血动脉,并发现回流静脉13例;肺发育异常及其他系统畸形14例.容积再现(VR)对肺隔离症的异常供血血管及气道显示最佳.结论 多层螺旋CT增强扫描结合图像后处理可清晰显示肺隔离症及异常动静脉及伴发畸形,为儿童肺隔离症的首选检查方法.

Multi-slice spiral CT application in pulmonary sequestration in pediatric population

Objective To evaluate the role of multi-slice computed tomography (MSCT) in the diagnosis of pulmonary sequestration.Methods MSCT scans of 18 cases of pulmonary sequestration proved by surgery and pathology were reviewed.All cases underwent plain and contrast enhanced CT scanning,and retrospective reconstruction was made.Various reconstruction techniques in displaying the pulmonary sequestration and associated malformation were evaluated.Results Anomalous systemic arterial supply was discovered by transverse CT images in 12 cases.The reconstructed images using multiple methods showed the aberrant artery more clearly in all cases,including 6 cases in which the abnormalities were not confirmed by transverse CT.Drainage vein was revealed in 13 cases and lung heteroplasia with other malformation was demonstrated in 14 cases.Volume rendering (VR) reconstruction is the optimal choice for displaying the abnormal vessels and airway.Conclusion Enhanced MSCT with image post-processing can show the abnormal artery and vein of the pulmonary sequestration and the associated malformation,so it is the first choice in diagnosing pulmonary sequestration in pediatric population.