Learn More
OBJECTIVES We sought to compare the usefulness of echocardiography and magnetic resonance imaging in neonates with a borderline small left ventricle. METHODS The preoperative magnetic resonance and echocardiography studies of 20 consecutive patients (mean age 10 +/- 9 days) undergoing magnetic resonance imaging were analyzed. The diagnoses were aortic(More)
Although echocardiography is the first-line imaging modality in the diagnosis of total anomalous pulmonary venous connection (TAPVC), multidetector CT (MDCT) could have advantages in the diagnosis of TAPVC in certain cases. To compare MDCT with echocardiography in the evaluation of TAPVC. Enrolled in the study were 23 patients with surgically proven TAPVC.(More)
Scalar quantization-based watermarking schemes are very vulnerable to amplitude modification attack. To overcome this problem, we propose a novel and robust algorithm that estimates the modified quantization step size by searching QE (quantization error) function. For efficient searching of QE curve, we analyze the peak curve of QE analytically and derive(More)
Quantization-based watermarking schemes such as SCS and QIM are known to be very vulnerable to the amplitude modification attack. Thus accurate estimation of the amplitude modification, i.e., estimation of a modified quantization step size is required before watermark detection. In this paper, we propose a robust algorithm to estimate the modified(More)
BACKGROUND The reimplantation of the coronary arteries from a single aortic sinus (single sinus coronary artery) in an arterial switch operation remains a technically challenging procedure. The technique of coronary transfer in this situation should be individualized depending on coronary ostial anatomy. We reviewed our techniques of coronary reimplantation(More)
BACKGROUND Accurate coronary reimplantation is the most important component in the arterial switch operation. It is especially demanding for the less experienced surgeons. We compared the result of the technique of coronary reimplantation after neoaortic reconstruction with that of the open trap door technique. METHODS From March 1994 to June 2004, 103(More)
We present an operative technique of pulmonic valve annular enlargement with concomitant valve repair using two pericardial patches to reduce pulmonary regurgitation after complete repair of tetralogy of Fallot. We have used this technique in 18 patients with tetralogy of Fallot with excellent results.