Dual Source Computed Tomography in Patients with Congenital Heart Disease

ObjectivesThe objective of this study was to review our early experience with the dual source computed tomography (DSCT), a recently available scanner technique equipped with two X-ray tubes and two detectors, in the context of congenital cardiac malformations. Patients and MethodsWe reviewed 40 pediatric patients with congenital heart disease (CHD) who underwent DSCT between September 2009 and December 2011 as diagnostic imaging tool for surgical procedures. ResultsThe median age was 0.36 years (range: 3 days to 44 years). Great vessels (n=13), cardiac anatomy (n=13), trachea and vascular rings (n=7), pulmonary veins (n=4), and coronary arteries (n=3) were focused on, which revealed important information for surgery. Scanning quality was affected in only two cases (metal artifacts and tachycardia). Overall median age-specific dose was 1.47 mSv. In patients younger than 1year (n=26), median dose was 1.28 mSv. ConclusionDSCT allows a very rapid scan speed, examinations are performed in spontaneously breathing patients, and the radiation exposure is relatively low. It is very valuable in the setting of complex surgery by revealing the position of anatomical structures in their relation to each other. Missing information can be acquired less invasively in addition to echocardiography and might replace cardiac catheterization for several morphological indications.