Clinical application of dual-source CT using low-dose technology in diagnosing complex congenital heart diseases / 临床儿科杂志

ABSTRACT

Objective To evaluate the application of dual-source CT (DSCT) using low-dose technology in diagnosing complex congenital heart diseases. Methods The DSCT data of 31 cases with complex congenital heart diseas-es conifrmed by operation were retrospectively analysed and classiifed into four groupsgroup A(≤4 months old, n=12); group B (>4 months old~1 year old, n=3);group C (>1 year~6 years old, n=8) and group D (>6 years old, n=8). Results The diagnosis conformation rate of DSCT with surgery were 94.59%. The diagnostic conformation rate of intracardic anormalies using DSCT was 92.86%. And the diagnostic conformation of DSCT in patients with abnormal connection of atrium or ventri-cle to great vessels and the extrocardic anormalies was 95.65%. The average effective dose in each group were 1.16±0.06 mSv, 1.28±0.07 mSv, 1.96±0.54 mSv and 2.77±0.38 mSv, respectively. The ratio of the high quality images was 90.32%. Con-clusions The application of low dose technology in DSCT can clearly display the anomalies, and signiifcantly reduce the radiation dose without losing image quality as well.