64层CT检测婴幼儿左侧冠状动脉起源于肺动脉

Detecting anomalous origin of left coronary artery from the pulmonary artery in infants with 64-slice CT

目的探讨64层CT冠状动脉成像对婴幼儿左冠状动脉起源于肺动脉的诊断价值。方法回顾性分析10例经手术证实左冠状动脉起源于肺动脉的婴幼儿,年龄5个月-2岁,体重5.5-10.0 kg。CT检查采用回顾性心电门控增强扫描,管电压80 kV,管电流150 mA,球管旋转速度0.35 s/转,层厚0.625 mm,螺距0.2。结果CT扫描时患儿心率110-150次/分。图像质量均能满足诊断要求,辐射剂量1.11-1.62 mSv。所有患儿均为左侧冠状动脉起源于肺动脉,其中左冠状动脉开口于肺动脉右后窦及左后窦各4例,开口于肺动脉窦远侧右后壁及下壁各1例。结论64层CT冠状动脉成像可在低辐射剂量条件下准确显示婴幼儿左侧冠状动脉起源于肺动脉的开口及走行。

Objective To explore the value of 64-slice CT coronary artery angiography in detecting anomalous origin of left coronary artery from the pulmonary artery（ALCAPA） in infants.Methods Ten children aged from 5 months to 2 years and weighed from 5.5 to 10.0 kilograms with surgical confirmed ALCAPA were underwent contrast-enhanced retrospective ECG-gated 64-slice CT,and the data were retrospectively analyezd.Scanning were performed with 80 kV tube voltage,150 mA tube current,0.35 s rotation time,0.625 mm slice thickness and 0.2 pitch.Results The heart rate ranged from 110 to 150 beats per minute.All images were good enough for diagnosis.The radiation dose was 1.11—1.62 mSv.The left coronary arteries were found to originate from the posterior-right sinuse in 4 patients,from posterior-left sinuse in 4 parients,from posterior-right wall and inferior wall above the pulmonary sinuses in 1 patient,respectively.Conclusion The 64-slice CT coronary artery angiography can reveal the location of the ectopic ostium and the course of left coronary artery in ALCAPA infants with low radiation dose.