Seung Won Yi

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Background. This was a retrospective study of clinical and radiological results of cervical arthroplasty using the Bryan cervical disc prosthesis to evaluate the efficacy of arthroplasty in clinical applications. Methods. A total of 46 patients underwent arthroplasty of a single level using the Bryan disc prosthesis. Clinical outcome was assessed using the(More)
Presbycusis, a bilateral sensorineural hearing loss caused by changes in the inner ear, is related to multiple factors such as noise exposure and otologic disease. In institute-based studies, we tried to determine the incidence of presbycusis in Korean populations living in Seoul, Kyunggi and Kangwon provinces by gender and age groups. The subjects were(More)
Ionizing radiation has long been used in medicine since the discovery of X-rays. Diagnostic imaging using synchrotron radiation has been under investigation since Rubenstein et al. reported dual-energy iodine-K-edge subtraction coronary angiography. Recently, computed tomography (CT) and magnetic resonance imaging (MRI) have provided better quality results(More)
This is the first published report of a patient with Klippel-Feil syndrome treated with cervical arthroplasty. A 36-year-old man presented with posterior neck pain and myelopathic symptoms. A radiograph demonstrated congenital fusion of the vertebral bodies at C2–3, C4–5 and C5–6. On MRI, the spinal cord was compressed by a protruding cervical disc and bony(More)
Background. This report presents general information on herniated thoracic discs, their clinical manifestations as well as surgical treatment, and examines the differences in the surgical outcome based on disc characteristics. Methods. This study includes 33 thoracic discectomies in 29 patients with a ventrally situated herniated thoracic disc reaching to(More)
Thirty-three temporal lobe epilepsy (TLE) patients, 19 left TLE and 14 right TLE, underwent an intracarotid amobarbital procedure. For each patient, hemispheric memory laterality was determined by measuring the relative magnitude of recognition memory following left versus right hemisphere injection of sodium amobarbital. The patients were divided into(More)
This paper examines the feasibility of implementing transmission lines in a commercially-available SiGe HBT BiCMOS technology. Thin film microstrip transmission lines, using the top and bottom metalization layers (with a 3.24 /spl mu/m separation), from a 4 layer metal process SiGe HBT technology were designed, fabricated, and measured up to 110 GHz. These(More)
H. J. Kong Jin Choi J. S. Shin S. W. Yi B. G. Jeon Korea Advanced Institute of Science and Technology Department of Physics Daejeon 305-701, Korea E-mail: Abstract. By numerical simulations, it has been shown that a conventional cylindrical rod can be used as a hollow conic beam generator by illuminating a parallel laser beam inclined to(More)
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