摘要目的 探讨双源CT(DSCT)门控下低剂量扫描在主动脉弓断离诊断中的价值.方法 对9例主动脉弓断离患儿行DSCT门控下低剂量心胸联合血管成像扫描并进行胸部动脉血管重建,进行诊断.所有患儿同时行心脏彩色多普勒(CDFI)检查,2种检查方法 在3 d内完成.所有患儿均行手术治疗.结果 9例行DSCT门控下低剂量心胸联合血管成像均成功完成,DSCT均诊断为主动脉弓断离,其中伴有室间隔缺损(VSD)9例、动脉导管未闭(PDA)8例、冠状动脉起源异常3例、支气管动脉扩张2例.断离后降主动脉的血液来源于肺动脉8例、肋间动脉和头臂动脉1例.CDFI诊断主动脉弓断离7例、动脉单干1例、主动脉缩窄1例,其中伴有VSD 9例、PDA 8例.5例断离后主动脉弓血液来源于肺动脉,1例断离后降主动脉的血液来源于肋间动脉及头臂动脉未能显示,1例显示支气管动脉扩张.与手术结果 对照:DSCT诊断准确率为94.12%(32/34处),CDFI诊断准确率为82.35%(28/34 处).结论 DSCT是诊断主动脉弓断离的有效方法 .

abstractsObjective To explore the value of low-dose gated dual-source CT(DSCT)in the diagnosis of interrupted aortic.arch.Methods Nine pediatric patients performed DSCT angiography and color Doppler flow imaging(CDFI)in the thoracic aorta and heart.All patients were operated.Results DSCT examination was finished in all patients with interrupted aortic arch.Nine patients were associated with ventricular septal defect(VSD),8 patients with patent ductus arteriosus(PDA),2 with bronchus artery dilation and 3 with abnormal origin of the coronary artery.Seven patients were diagnosed as interrupted aortic arch by CDFI,2 patients were diagnosed as truncus arteriosus and coarctation of the aorta respectively.All VSDs and PDAs were detected by CDFI.The diagnostic accuracy of DSCT and CDFI were 94.12%(32/34)and 82.35(28/34)respectively.Conclusion DSCT is a valuable imaging method for the diagnosis of pediatric interrupted aortic arch.