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척수종양 105례에 대한 임상분석 : Review of 105 Cases(1981-1991)
윤성운,임영진,김태성,이봉암,김국기,임언 대한신경외과학회 1993 Journal of Korean neurosurgical society Vol.22 No.11
The authors analyzed 105 cases of spinal cord tumor in regarding to the age, sex, location and distribution, clinical presentation and postoperative outcomes. They were confirmed by pathologic study at the Kyung Hee Medical Cented from 1981 to 1991. The incidence of spinal cord tumors was slightly predominant in males. The most commom tumor was neurogenic tumor. The neurogenic tumor composed 43.8%(46 cases), and the rests were meningioma 15.2%(16 cases), metstasis 10.5%(11 cases) and others. The tumor were located most frequently in the thoracic area(31.4%) and in the intradural extramedullary space(56.1%). Most common initial symptom of spinal cord tumors were pain and it's mean duration was 8.3 month. The patients were assigned to one of four groups according to their neurologic deficit. About 66.6%(70 cases) of the patients were included in Groups Ⅰ and Ⅱ(mild neurologic deficit), and others were classified in Groups Ⅲ and Ⅳ(significant to sever neurologic deficit). Complete tumor removal was achieved in 70.4%(4 cases) of the patients, and subtotal removal was performed in 26.7%(28 cases), and biopay was performed in 2.9%(3 cases). Among the 105 patients, the postoperative outcomes on dischage were recovery in 36 cases(34.3%), improved in 45 cases(42.9%), stationary state in 12 cases(11.4%), and progression in 12 cases(11.4%).
뇌기저동맥 분기부 동맥류의 측두골 접근법과 테리온접근법 : 2증례 보고 2 Case Reports
윤성운,김국기,임영진,김태성,이봉암,임언 대한신경외과학회 1993 Journal of Korean neurosurgical society Vol.22 No.12
Two patients with basilar bifurcation aneurysm were treated by different approach, low lying posteriorly projecting aneurysm was clipped with subtemporal approach and high bifurcated basilar bifurcation aneurysm with multiplicity approached through pterional method. The author reviewed literature concerning the approaches of basilar bifurcation aneurysm.
레이저 스페클간섭법에 있어서 스페클크기와 측정 한계에 관한 연구
윤성운,김경석,양승필,정현철,김정호,이도윤 한국공작기계학회 1996 한국생산제조학회지 Vol.5 No.1
The high coherence of laser beam has made it possible to observe interference effects even in the light scattered from rough surfaces. That's why, when object with a scattering surface is illuminated with laser light, we do see a speckled appearance due to random interference. This sort of unique property of laser speckle has brought into existence the new noncontacting techniques such as speckle metrology method of measuring deformation, displacement, and vibration etc of objects with high optical sensitivity. The measurable range of speckle metrology especially used to measure in-plane information, however, is limited by some factors, the so-called strain, rotation, tilt of surface and out of displacement perpendicular to the plane of analysis. This restrictions severly limits the measurable range of speckle metrology by causing the decorrelation of speckle patterns. It is the purpose of this paper to give a survey on the measurable limitation of speckle photography method that is one of speckle metrology. Namely we will discuss the mutual relationships and problems of each limitations adding the restriction of the largest and smallest displacement measurable with speckle methods.