Detecting anomalous origin of left coronary artery from the pulmonary artery in infants with 64-slice CT / 中国医学影像技术

ABSTRACT

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.