Young Jun Cho

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To evaluate image quality (IQ) of low-radiation-dose paediatric cardiovascular CT angiography (CTA), comparing iterative reconstruction in image space (IRIS) and sinogram-affirmed iterative reconstruction (SAFIRE) with filtered back-projection (FBP) and estimate the potential for further dose reductions. Forty neonates and children underwent low radiation(More)
To evaluate the performance of three-dimensional semi-automated evaluation software for the assessment of myocardial blood flow (MBF) and blood volume (MBV) at dynamic myocardial perfusion computed tomography (CT). Volume-based software relying on marginal space learning and probabilistic boosting tree-based contour fitting was applied to CT myocardial(More)
In this paper, we examine the effect of managers’ pay duration on firms’ voluntary disclosures. Pay duration refers to the average period that it takes for managers’ annual compensation to vest. We hypothesize and find that pay duration can incentivize managers to provide more bad news earnings forecasts. This result holds after controlling for the level of(More)
BACKGROUND CT angiography (CTA) is increasingly used for the evaluation of congenital heart disease. OBJECTIVE The aim was to determine the diagnostic accuracy of CTA in infants with tetralogy of Fallot with pulmonary atresia (ToF-PA) and major aortopulmonary collateral arteries (MAPCAs). METHODS We retrospectively evaluated 18 consecutive patients (7(More)
Raoultella species are gram-negative, non-motile, aerobic bacilli that are primarily considered as environmental bacteria. Raoultella planticola is reportedly a rare cause of human infections. Also, the definite pathological mechanism of Raoultella planticola is currently unknown. We report a case of pneumonia caused by Raoultella planticola.
PURPOSE To investigate in vitro and in vivo the use of image-based and raw data-based iterative reconstruction algorithms for quantification of coronary artery calcium by using the Agatston score and subsequent cardiac risk stratification. MATERIALS AND METHODS In vitro data were obtained by using a moving anthropomorphic cardiac phantom containing(More)
OBJECTIVE To describe the technical feasibility and usefulness of extrahepatic biliary stone removal by balloon sphincteroplasty and occlusion balloon pushing. MATERIALS AND METHODS Fifteen patients with extrahepatic bile duct stones were included in this study. Endoscopic stone removal was not successful in 13 patients, and two patients refused the(More)
This study aimed to compare the effects of the automated and manual methods for determining the optimal phase of image reconstruction with the use of 64-slice coronary CT angiography (CCTA). In 63 patients, the optimal trigger delay was determined using an automated technique (PhaseXact) and by manual phase selection from the images reconstructed at a 10 ms(More)
UNLABELLED Transient ischemic dilation (TID) in the setting of abnormal stress-rest cardiac SPECT myocardial perfusion imaging (MPI) has been linked with increased cardiovascular risk. However, the significance of TID in the setting of an otherwise normal SPECT MPI study has not been clearly established. In this study, cardiac CT was used to evaluate the(More)