Table 1.
Baseline characteristics of the study participants and radiation dose analysis.
Table 2.
Comparison of multi-slice spiral computed tomography and trans-thoracic echocardiography for the diagnosis of congenital heart malformations identified by surgery.
Fig 1.
Representative multi-slice spiral computed tomography images from a female patient aged 4 months.
A. Scanning parameters. CTDIvol, volume computed tomography dose index; DLP, dose length product (DLP). The effective radiation dose was calculated to be 0.026 × 2.3 × 8 = 0.478 mSv. B-D. Multiplanar reconstructed images showing subvalvular aortic stenosis, with one side of the ventricular septum protruding into the left ventricular outflow tract (B, red arrow). It was observed in the aortic isthmus that one tubular channel was connected to the aorta (C, white arrow), and there was an atrial septal defect (D, black arrow). AO, aorta; DAO, descending aorta; LA, left atrium; LV, left ventricle; PA, pulmonary artery; RA, right atrium; RV, right ventricle.
Fig 2.
Representative multi-slice spiral computed tomography images from a male patient aged 3 years.
A. Scanning parameters. CTDIvol, volume computed tomography dose index; DLP, dose length product (DLP). The effective radiation dose was calculated to be 0.018×2.3×25 = 1.035 mSv. B. Multiplanar reconstructed image showing a single ventricle, tricuspid valve atresia (white arrow), and a large atrial septal defect (black arrow). C. Maximum intensity projection showing the connection between the superior vena cava and right pulmonary artery (after surgery with the Glenn procedure), and primary pulmonary artery atresia (red arrow). D. Volume rendered image showing the features seen in C. LA, left atrium; PA, pulmonary artery; RA, right atrium; SV, single ventricle; SVC, superior vena cava.
Fig 3.
Representative multi-slice spiral computed tomography images from a female patient aged 2 years.
A. Scanning parameters. CTDIvol, volume computed tomography dose index; DLP, dose length product (DLP). The effective radiation dose was calculated to be 0.018×2.3×13 = 0.538 mSv. The maximum density in B, C, and E revealed a membrane in the left atrium (white arrow), which separated the left atrium into the left atrium proper (LA) and a split atrium (S). Non-continuous perforated holes existed on the anterior part of the membrane (red arrow). The left superior vena cava is shown (yellow arrow). D. TTE revealed the membrane in the left atrium (white arrow) and communicating holes (red arrows). F and G. VR images show that the membrane separated the atrium into two chambers. The communicating holes were present at the anterior part of the membrane, and that left and right pulmonary veins were led to the split atrium (S). LA, left atrium; S, split atrium; RA, right atrium; LSVC, left superior vena cava; TTE, trans-thoracic echocardiography; VR, volume rendered.