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파노라마촬영장치의 선형단층상에 의한 하악골의 협설단면 평가
홍순기,김재덕 대한구강악안면방사선학회 2001 Imaging Science in Dentistry Vol.31 No.2
Purpose : To evaluate the precision of measurements of distances and angle in the cross-sectional views of linear tomogram of panorama and to assess the technique for visualizing the mandibular canal. Methods : Ten dry mandibles were radiographically examined with 3 continuous cross-sectional views of linear tomogram of panorama and 4 continuous computed tomograms. The distance between the superior border of canal and alveolar crest and the bucco-lingual width of alveolar bone at the level of the superior border of canal and the angle between the two lines above were measured. Measurements were performed by radiologist and implantologist group and compared with measurements on computed radiograms of the same areas. Results : The measurements differences for the distance of alveolar bone height between in panorama and in CT showed 0.9 mm±0.6 mm by radiologists and 1.3 mm±0.8 mm by implantologists. There was no statistically significant difference between two groups' measurements. The differences in measurements for the distance of alveolar bone width between in panorama and in CT showed 0.5 mm±0.8 mm by radiologists and 2.5 mm±1.4 mm by implantologists. There was significant difference (P〈 0.05) between two groups' measurements. The average bucco-lingual inclination of alveolar bone above mandibular canal was average 95.8° in CT. The difference of measurements between two groups was average 1 ±0.9°. Three cross-sectional views of panorama could show that the mandibular canal crosses antero-lingually and slopes inferiorly from the posterior segment of the mandible. Conclusions : The measurements in the linear tomogram of panorama by radiologists gave the accurate values of the distances and the angle compared with the values in computed tomograms. (Korean J Oral Maxillofac Radiol 2001;31:101-7)
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뇌전산화 단층촬영을 이용한 두부손상 환자의 조기 예후 추정
홍순기,장재훈,한용표 대한신경외과학회 1984 Journal of Korean neurosurgical society Vol.13 No.1
The cerebral contusion (necrotic brain tissue infiltrated with blood) is common post-traumatic lesion. In 851 consecutive C-T scan performed by 48 hours from injury, the contusion were present in 193 (22.6%) of the case. Comparing the midline shift, area, number, size of the lesions and their etiopathogenesis with the clinical course (assessed by Glasgow coma scale), it is possible to evaluate the early prognosis. The patient who showed 1) midline shift over 15㎜, 2) the contusional lesion in basal ganglia, brain stem or corpus callosum, 3) multiple or large sized lesion took poor prognosis. Cortical contusion especially in the frontal region had relatively good prognosis. The pathogenetic mechanisms (angular acceleration of the brain) is the same in basal ganglia, brain stem and corpus callosum, but a direct impact of the In conclusion, the etiopathogenetic mechanism and consequent site of the cerebral contusion are the most important factors on the evaluation of the severity of the brain damage and their prognosis.
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거대한 뇌경막외 혈종이 환자의 예후에 미치는 영향 : 39예의 임상적 고찰 Analysis of 39 Cases
홍순기,한용표,김수일,허철,김헌주 대한신경외과학회 1987 Journal of Korean neurosurgical society Vol.16 No.4
The authors analyzed 39 patients with huge epidural hematoma following craniocerebral trauma. Multiple factors such as bleeder. Glasgow Coma Score, hematoma site and its' volume, midline shift, and associated traumatic lesion on initial CT scan appear to exert bad outcome. The initial CT scan findings on admission were assessed and the results obtained are as follows. 1) The outcome harboring huge epidural hematoma is bad in 28% of total 39 patients. 2) The main bleeder is varied in origin according to the hematoma site. 3) The temporo-parietal epidural hematoma affects significantly the Glasgow Coma Scale(GCS) and the patient's outcome, compared with those of frontal and occipital area. 4) The patient's outcome is closely related to the hematoma volume, especially over 16% of total brain volume. 5) The midline shift over 15 ㎜ suggests the bad outcome, especially in temporo-parietal epidural hematoma.
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홍순기,김재석 동북아관광학회 2018 동북아관광연구 Vol.14 No.2
세계적으로 지속적인 성장을 보이고 있는 숙박산업도 외부환경의 변화로 인해 많은영향을 받고 있다. 대표적인 거시환경 변화라 할 수 있는 국제금융 위기, IMF 금융구제기간, 사스(SARS) 등은 실물 경제를 위축시켰고 전반적인 숙박산업에 부정적인 영향을 미치는 것으로 나타났다. 이에 본 연구는 거시환경요인과 숙박산업의 효율성에대한 인과관계를 규명함으로써 의사결정자의 경영전략수립에 도움이 되고, 잠재적 시장 진입자에게 유용한 정보를 제공하고자 하는 데 목적이 있다. 독립변수인 거시환경변수로 소비자물가지수, 경제성장률, 총저축률, 외환보유액, 국내총생산, 1인당 GNI, 환율, 유가, SARS, MERS, 신종플루, 오일쇼크를 선정하였다. 종속변수는 숙박산업의 경영성과를 나타내는 수익성비율과 활동성 비율을 사용하였다. 수익성 비율은 매출액이익률, 총자산이익률, 매출액영업이익률을 사용하였으며, 활동성비율은 총자산회전율, 유형자산회전율, 고정자산회전율을 변수로 선정하였다. 연구 결과, 수익성비율에 미치는 영향은, 소비자물가지수, 경제성장률, 총저축률, 1 인당 GNI 변수가 정(+)의 영향을 미쳤으며, 외환보유액, 환율, MERS 변수가 부(-) 의 영향을 미치는 것으로 나타났다. 활동성비율에 미치는 영향은, 총자산회전율에만 1 인당 GNI 변수가 정(+)의 영향을 미치는 것으로 나타났으며, 총저축률, 외환보유액, 환율 변수가 부(-)의 영향을 미치는 것으로 나타났다. 향후 연구에서는 분기별 자료와 지역, 규모, 등급으로 구분할 수 있는 자료를 활용하여 조금 더 세부적인 분석이 진행되어야 한다. 아울러, 심도 있는 계량분석기법을이용하여 거시환경요인과 경영성과의 인과관계를 연구할 필요가 있다고 사료된다. The global lodging industry, which is growing steadily, is also greatly influenced by changes in the external environment. The global financial crisis, IMF financial relief period and SARS, which are considered representative macro-environmental changes, have weakened the real economy and negatively affect the overall lodging industry. The purpose of this study is to identify the causal relationship between macro-environments and the management performance of the lodging industry and to provide useful information to potential market entrants. The impact of macro-environment variables on sales and profits was positively influenced by the CPI, economic growth rate, total saving rate, per capita GNI, foreign exchange reserves, and exchange rate variables, which were negatively affected by, SARS, MERS, Influenza A and Oil Shock respectively. The effect on the profitability ratio was positively affected by the CPI, the economic growth rate, the total saving rate and the GNI per capita. Foreign reserves, the exchange rate, and the MERS variable had negative effects . The effect on the rate of activity has shown that the per capita GNI variable affects positive (+) only on the total assets turnover rate and negative effect of total saving rate, foreign exchange reserves and exchange rate variable. Future work should include a more detailed analysis using quarterly data and data that can be divided into regions, sizes, and grades. In addition, it is necessary to study the causal relationship between macro-economic factors and business performance using in - depth measurement techniques.
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