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Flangeless Esser PET Phantom 영상 자동 분석 프로그램의 유용성 평가
남궁창경,남기표,김경식,김정선,임기천,신상기,조시만,동경래,NamGung, Chang-Kyeong,Nam, Ki-Pyo,Kim, Kyeong-Sik,Kim, Jeong-Seon,Lim, Ki-Cheon,Shin, Sang-Ki,Cho, Shee-Man,Dong, Kyung-Rae 대한핵의학기술학회 2009 핵의학 기술 Vol.13 No.1
Purpose: ACR (American College of Radiology) offers variable parameters to PET/CT quality control by using ACR Phantom. ACR Phantom was made to evaluate parameters which are uniformity, attenuation, scatter, contrast and resolution. Manual analysis method wasn't good for the use of QC because values of parameter were changed as it may user and it takes long time to analysis. Ki-Chun Lim, a nuclear scientist in AMC, developed program that automatically analysis values of parameter by using ACR Phantom to overcome above problems. In this study, we evaluated automatic analysis program's usability, through the comparing SUV of each method, reproducibility of SUV when repeated analysis and the time required. Materials and Methods: Using Flangeless Esser PET Phantom, the ideal ratio of 4 : 1 hot cylinder and BKG but it actually showed a ratio of 3.89 to 1 hot cylinder and BKG. SIEMENS Biograph True Point 40 was used in this study. We obtained images using ACR phantom at Fusion WB PET Scan condition (2 min/bed) and 120 kV, 100 mAs CT condition. Using True X method, 3 iterations, 14 subsets, Gaussian filter, FWHM 4 mm and Zoom Factor 1.0, $168{\times}168$ image size. We obtained Max. & Min. SUV and SUV Mean values at Cylinder (8, 12, 16, 25 mm, Air, Bone, Water, BKG) by automatic program and obtained SUV by manual method. After that, we compared manual and automatic method. we estimate the time required from opened the image data to final work sheet was completed. Results: Automatic program always showed same result and same the time required. At 8, 12, 16 and 25 m cylinder, manual method showed 6.69, 3.46, 2.59, 1.24 CV values. The larger cylinder size became, the smaller CV became. In manual method, bone, air, water's CV were over 9.9 except BKG (2.32). Obtained CV of Mean SUV showed BKG was low (0.85) and bone was high (7.52). The time required was 45 second, 882 second respectably. Conclusions: As a result of difference automatic method and manual method, automatic method showed always same result, manual method showed that the smaller hot cylinders became, the lager CV became. Hot cylinders mean region size, the smaller hot cylinder size becomes we had some trouble in doing ROI poison setting. And it means increase in variation of SUV. The Study showed the time required of automatic method was shorten then manual method.
Jogging 및 Rope Skipping 운동이 여고생의 심폐 지구력에 미치는 영향
李基天 인하대학교 스포츠과학연구소 2000 論文集 Vol.12 No.-
This paper attempted to compare and analyze two groups-a comparison group and an experimental group, which are considered to improve the cardio-respiratory and aerobic exercise through the jogging and the rope-shipping. It also tried to find out how often and differently such exercises can affect the circulatory-respiratory abilities at the beginning or the finishing stage of a eight-week exercising period. For its convenience, twenty-four students from H Girls' High School were chosen. They were divided into two groups such as an experimental and a comparison group.(experimental group: eight students for jogging, and rope-skipping respectively. Comparison group : eight students). Using 'Tread Mill', the result was analyzed and some conclusions were made as follows ; 1.As for the variations concerning the aerobic cardio-respiratory, three groups showed expected difference(5%) as shown in table 4 statistically, when the average of pulse rate, maximum pulse rate, normal quantity of intaken oxygen and, maximum quantity of intaken oxygen, maximum carbon dioxide, and the hour of labor were sampled and analyzed, while the three groups showed little difference in the quantity of the breath ventilation, the quantity of the carbon dioxide, when they were relaxed. 2.As for the non-aerobic reverse value, the three groups showed the expected difference as shown in the table 5. But they showed no oxygen and the absolute value of breath-ventilation. 3.As for the pulse change at the time of restoration, there was a five-percent difference as shown in table 6, when the result of the estimate were sampled and analyzed directly after two minutes' exercise in jogging group-comparison group and rope-skipping group, comparison group, while there was little difference between the tow experimental groups, such as the jogging groups and rope-skipping groups. 4.As for the change of the lactic acid density concerning jogging and, rope-skipping, in comparison group, there appeared to be five percent difference as shown in table 7, when the average pulse rates among the three groups were estimated, whereas there was little difference between the jogging group and rope-skipping group directly before or after the given exercise.
차천석,김영남,심재기,김기형,양인영 朝鮮大學校 機械技術硏究所 2002 機械技術硏究 Vol.5 No.1
차량 전면충돌시 에너지흡수량이 가장 큰 차량전면부 사이드부재의 기본형상인 점용접된 단일모자형 단면부재에 대하여, 정적(0.00017m/sec), 준정적(0.017m/sec) 축방향 압궤실험을 행하였다. 이를 기초로 자체 제작한 수직식 공기압 충격실험장치를 이용하여 실제 차량이 충돌하는 것을 상정하여 충격속도 7.19m/sec(충격에너지 1034J)하에서 형상의 변화 및 폭비와 플랜지 용접간격의 변화에 따른 압궤특성을 고찰하여, 최적의 에너지 흡수성능을 갖는 구조부재에 대하여 검토하였다. The fundamentally and widely used spot welded sections of automobiles(hat and double hat shaped section members) absorb most of the energy in a front-end collision. The sections were tested on axial static(0.00017m/sec) and -quasi-staic(0.017m/sec) loads. Based on these test results, spcimens with various thicknesses, width ratios and spot weld pitches on the flange have been tested with high impact velocity(7.19m/sec 1034J) which imitate a real life car arash Characteristics of collapse have been reviewed and structures of optimal energy absorbing capacity is suggested.
장기훈,김준성,조현진,김권천 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.1
The thyroid gland has been considered as an infrequent metastasis site. However, the incidence of thyroid involvement in reported autopsy series varies from 1.25% to 24%. In most autopsy series, breast and lung cancers have been the most frequent metastatic diseases to the thyroid gland, In contrast, renal cell carcinoma is the most frequent source of metastasis in clinical series. Many reports suggested that ultrasonography and subsequent ultrasonography-guided FNAB are mostly best suited for diagnosis of thyroid metastasis. Metastasis to the thyroid gland is associated with a poor prognosis and the prognosis depends essentially on the primary cancer. Surgery may prolong survival in a patient in whom the thyroid metastasis isolated, and thus early diagnosis and aggressive treatment should be performed in patients with the history of cancer.
김기훈,金虎林,金光華,윤기원,한천구 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)
Crushed sand is made by crushing the rock artificially. With the wide shortage of natural fine aggregates at all regions in Korea. crushed sand has been increasingly consumed as a alternative aggreagtes of natural sand. But there is insufficient information related to the actual situation on the produce. quality and manufacturing company of crushed sand. In this paper. survey is performed in order to know actual consumption situation of crushed sand through ready mixed concrete company in domestic. The remicon companies using crushed sand were estimated with 55%. According to the using method of crushed sand. most remicon company used fine aggregates by mixing natural sand and crushed sand. It is found that natural sand is replaced by crushed sand by about 20~50%. For quality problems in using crushed sand. grain shape. grade and fine particles shall be improved to meet the quality requirement of remicon and wide application. Therefore. it is found that quality improvement of crushed sand is required.
경피적 겸자 정복 및 골수강내 금속핀 고정을 이용한 쇄골 골절의 치료
홍기도,하성식,정남식,심재천,김경호 대한골절학회 2004 대한골절학회지 Vol.17 No.4
목적 : 경피적 겸자 정복 및 골수강내 금속판 고정술을 이용한 쇄골 간부 골절의 치료에 대해 유용성을 규명해 보고자 하였다. 대상 및 방법 : 2002년 1월부터 2003년 7월까지 본원에서 쇄골 간부 골절 환자 중 신경 및 혈관 손상이 없었고, 골절의 분쇄상이 비교적 적었던 총 16례를 대상으로 겸자를 이용한 경피적 정복 후에 골수강에 금속판을 삽입하여 고정하였다. 술 후 유합 정도 및 결과를 임상적, 방사선학적으로 분석하였다. 결과 : 방사선학적으로 골유합을 보인 경우가 총 15례였으며, 술 후 평균 9.1주에 유합 소견을 관찰하였다, 임상적으로 강 등의 기준에 따라 구분한 결과, 우수 이상이 14례로 나타났다. 1례에서 1주 만에 K-강선의 내측전위로 골절부위가 재전위되어 관혈적 정복 및 금속판 내 고정을 시행한 이외에 다른 주요 합병증은 없었다. 결론 : 저자들의 방법은 수술시간이 짧고 간단하며, 연부조직의 추가적 손상이 적어 골유합율이 높고, 수술 반흔을 남기지 않아 수술적 적응을 신중히 고려한다면 쇄골 간부 골절의 치료법의 하나로 유용할 것으로 사료된다. Purpose: To investigate the utility of surgical treatment of clavicle shan fracture using a percutaneous towel clip reduction and intramedullary fixation. Materials and Methods : This study was conducted for total 16 case of patients who had no neurovascular injury and a few comminuted bone fragment among patients with clavicle shaft fracture from January 2002 to July 2003. The method of operation was percutaneous towel clip reduction and intramedullary fixation. The clinical and radiological results were evaluated. Results : Radiologically, 15 cases showed bone unions and the avenge time was 9.1 weeks. According to Kang's criteria clinically, there were 14 cases which were more than an excellence. One case substituted open reduction and nailing fixation due to a medial migration of K-wire and re-displacement of fracture even in 1 week. However, there wasn't any other major complication. Conclusion : Due to its having no additional injury to soft tissues, no scar formations, and its short operation time, percutaneous towel clip reduction and intramedullary fixation will be very useful as one of the treatments of clavicular shaft fracture if it follows correct surgical indications.
전기천,강시환,박광순,김상익 경남대학교 환경문제연구소 1990 환경연구 Vol.12 No.-
최근 한반도를 통과했던 태풍 중 그 규모가 커서 海上에서 발생된 颱風波浪에 의해 특히 남해안 지역에 큰 재해를 준 1986년 태풍 Vera(8613)호 통과시에 南海의 거문도와 거제도 海上에서 동시에 태풍파랑을 관측하였다. 관측된 태풍파랑의 재현을 위하여 유럽의 북해를 대상으로 최근 연구개발된 Hybrid Parametric Wave Model(HYPA)을 적용하여 Vera 통과시의 파랑분포를 수치적으로 계산하였으며, 그 계산결과를 관측치와 비교하였다. 또한 태풍파랑의 추정에 주로 사용되어온 Wilson모델의 결과와도 비교하여으며, HYPA모델의 결과가 Wilson모델에 비해 훨씬 관측된 파랑자료에 근접함을 보였다. 따라서 본 연구를 통해서 한반도 근해상에서 발생되는 태풍파랑의 예측과 추정에 있어 HYPA모델에 매우 정확함을 보여주었다. During the passage of Typhoon Vera(8613) which causes the heavy natural disasters, especially, on the southern coast of Korea, waves were simultaneously measured at two different locations of the South Sea, that is, near to the Geomun and the Geoje Islands. In order to reproduce the measured typhoen-waves, Hybrid Parameteric Wave Model(HYPA) which has been developed for the North Sea was adopted to calculate numerically the waves generated by the Typhoon Vera. The model results were jilter-compared with the measured waves, and also with the results of Wilson model which has been widely used for the hindcast of typhoon-waves. HYPA's results show in the closer ageement with the measured waves than those of Wilson's. Based on these comparisons, HYPA model can be used for more accurate forecast and hindcast of typhoon-waves in Korean Seas.