Jae Bum Lee

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The purpose of this study was to determine the precision and accuracy of facial soft tissue measurement using personal computer (PC)-based multiplanar reconstructed (MPR) computed tomography (CT) images and to evaluate the effect of the various CT scanning protocols on the facial soft tissue thickness measurement. Thirteen different CT imaging protocols(More)
BACKGROUND Endoscopic mucosal resection (EMR) is a useful therapeutic technique for colorectal tumors. However, for tumors larger than 20 mm, the chance of piecemeal resection is high. Recently introduced endoscopic submucosal dissection (ESD) enables en bloc resection regardless of the tumor size. This study aimed to compare the effectiveness and outcomes(More)
PURPOSE Endoscopic submucosal dissection (ESD) is a very useful endoscopic technique, making it possible to perform en bloc resection regardless of lesion size. Since the introduction of ESD at our hospital, we have performed 1,000 colorectal ESDs during 56 months. The purpose of this study was to evaluate the clinical outcomes of our colorectal ESD(More)
BACKGROUND The possible risk of colonic perforation during endoscopic submucosal dissection (ESD) for colorectal tumors is a barrier to wide application. This retrospective study was performed to evaluate the risk and the predictive factors for perforation during ESD procedure. METHODS Between October 2006 and November 2010, a total of 499 consecutive(More)
PURPOSE To compare the higher-order aberrations (HOAs) after laser-assisted subepithelial keratectomy (LASEK) using a conventional optical zone and a larger zone with a blend zone. SETTING Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea. METHODS In this prospective study, 19 patients with a manifest refraction of -3.00(More)
PURPOSE To assess the efficacy and safety of iris-fixated phakic intraocular lens (pIOL) implantation to correct myopia in eyes with previous retinal detachment (RD) surgery. SETTING Department of Ophthalmology, Soonchunhyang University College of Medicine, Seoul, South Korea. DESIGN Retrospective case series. METHODS Patients having pIOL implantation(More)
BACKGROUND Snare polypectomy of a giant pedunculated colorectal polyp is sometimes technically demanding, and, therefore, piecemeal resection is inevitable, despite the relative risk of invasive cancer and postpolypectomy bleeding. OBJECTIVE The aim of this study was to evaluate the efficacy and safety of endoscopic submucosal dissection in comparison(More)
PURPOSE To determine the effect of dilute alcohol on human corneal epithelial cellular morphology and viability. Dilute alcohol is used for epithelial removal during photorefractive keratectomy (PRK) and laser subepithelial keratomileusis (LASEK). METHODS Corneal epithelial sheets harvested from human eyes after alcohol application during PRK were(More)
OBJECTIVES To evaluate the effect of 20% alcohol on the white leghorn chick cornea and to determine the confocal and electron microscopic findings of laser subepithelial keratomileusis surgery in the white leghorn chick corneal model. METHOD Laser subepithelial keratomileusis surgery was performed on chick corneas and the morphologic changes were examined(More)
Software Distributed Shared Memory (SDSM)systems usually have the large coherence granularity that is imposed by the underlying virtual memory page size. To alleviate the coherence overheads such as the net worktraffic to preserve the coherence, or page misses caused by false sharing, relaxed memory models are widely accepted for the SDSM systems. In the(More)