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OBJECT Thoracic ossification of the ligamentum flavum (OLF), a main cause of thoracic myelopathy, is an uncommon disease entity. It is seen mostly in East Asia, although the majority of reports have issued from Japan. In the present study, the clinical features and prognostic factors of thoracic OLF were examined in a large number of Korean patients. (More)
OBJECTIVE To report a minimally invasive treatment option using percutaneous pedicle screw fixation with adjuvant treatment for metastatic thoraco-lumbar and lumbar spinal tumors. METHODS This is a retrospective study of charts of patients with spinal metastases. All were older than 18 years of age and were considered to have more than 3 months of life(More)
BACKGROUND We sought to identify preoperative factors significantly correlated with survival. We also aimed to evaluate the validity of the prognostic scores in the Tomita and Tokuhashi systems and discuss several aspects to improve the predictive accuracy of these systems. Moreover, we suggest modified criteria for selecting treatment strategies. METHODS(More)
In this paper, we propose an electronic ordering and payment system with embedded devices to improve a conventional manned ordering and payment method using a POS system for quick and easy ordering and payment. Embedded devices as thin clients of the proposed system can be placed on each table, and a user can choose a menu and can check his payment from the(More)
STUDY DESIGN Retrospective analysis. PURPOSES To introduce the mini-open lateral approach for the anterior lumbar interbody fusion (ALIF), and to investigate the advantages, technical pitfalls and complications by providing basic knowledge on extreme lateral interbody fusion (XLIF) or direct lumbar interbody fusion (DLIF). OVERVIEW OF LITERATURE(More)
A 25-year-old Korean woman was referred for uncontrolled hypertension. Laboratory examination revealed increased plasma renin activity and microscopic hematuria. Computed tomography demonstrated compression of the left renal vein (LRV) between the aorta and superior mesenteric artery; however, both renal arteries were intact and there was no adrenal mass.(More)
OBJECTIVE The cervicothoracic junction (CTJ) is a biomechanically and anatomically complex region that has traditionally posed problems for surgical access. In this retrospective study, we describe our clinical experiences of the treatment of metastatic spinal tumors at the CTJ and the results. METHODS From June 2006 to December 2011, 23 patients who(More)
In this paper, we investigate the effect of inaccurate channel estimation on the bit error rate (BER) performance of the convolutionally coded MIMO-OFDM systems with multilevel quadrature amplitude modulation (M-QAM, M=16, 64) and different diversity orders, particularly in spatially correlated fading channels. It is shown that, in a highly correlated(More)