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김성규,최지훈,윤상모,Kim, Sung-Kyu,Choi, Ji-Hoon,Yun, Sang-Mo 한국의학물리학회 2010 의학물리 Vol.21 No.3
전립선암에서 세기조절방사선치료와 입체조형방사선치료의 선량분포 특성을 비교하였다. 세기조절방사선치료에서는 치료계획표적용적에 200 cGy를 33회 조사하여 6,600 cGy가 조사되도록 하였다. 세기조절방사선치료에서는 PTV의 최대선량이 104.4%이었으며, 최소선량이 89.5%였으며, 삼차원입체조형치료에서는 PTV의 최대선량이 105.3%이었으며, 최소선량이 85.5%을 나타내었다. 100%에 대한 CI는 세기조절방사선치료에서 1.02였으며, 삼차원입체조형치료에서는 0.97을 나타내었다. 중요장기 직장에 대해서 세기조절방사선치료에서는 5,000 cGy 이상이 34.0%였으며, 삼차원입체조형치료에서는 63.3%였고, 방광에 대해서 세기조절방사선치료에서는 4,000 cGy 이상이 30.1%였으며, 삼차원입체조형치료에서는 30.6%였고, 오른쪽 대퇴골두부에 대해서 세기조절방사선치료에서는 2,000 cGy 이상이 9.5%였으며, 삼차원입체조형치료에서는 17.5%였고, 왼쪽 대퇴골두부에 대해서 세기조절방사선치료에서는 2,000 cGy 이상이 10.6%였으며, 삼차원입체조형치료에서는 18.3%을 나타내었다. 삼차원입체조형치료와 세기조절방사선치료의 비교에서 세기조절방사선치료가 삼차원입체조형치료에 비해 PTV의 선량분포에서는 5%의 정도 선량분포의 이득이 있었으며, 직장 선량에 대해서는 5,000 cGy 이상 선량에서 29.3%의 감소가 있었고, 방광 선량에 대해서는 거의 비슷한 분포를 나타내었고, 오른쪽 대퇴골두부의 선량에서는 8.0%, 왼쪽 대퇴골두부의 선량에서는 7.7%의 선량 이득을 나타내었다. The aim of this study was to compare the dose distribution of intensity modulated radiation therapy (IMRT) with 3 dimensional conformal radiation therapy (3DCRT) in prostate cancer. The IMRT plan and the 3DCRT plan used the 9 fields technique, respectively. In IMRT, tumor dose was a total dose of 66 Gy at 2.0 Gy per day, 5 days a week for 5 weeks. All cases were following the dose volume histogram (DVH) constraints. The maximum and minimum tumor dose constraints were 6,700 cGy and 6,500 cGy, respectively. The rectum dose constraints were <35% over 50 Gy. The bladder dose constraints were <35% over 40 Gy. The femur head dose constraints were <15% over 20 Gy. Tumor dose in the 3DCRT were 66 Gy. In IMRT, the maximum dose of PTV was 104.4% and minimum dose was 89.5% for given dose. In 3DCRT, the maximum dose of PTV was 105.3% and minimum dose was 85.5% for given dose. The rectum dose was 34.0% over 50 Gy in IMRT compared with 63.3% in 3DCRT. The bladder dose was 30.1% over 40 Gy in IMRT compared with 30.6% in 3DCRT. The right femur head dose was 9.5% over 20 Gy in IMRT compared with 17.5% in 3DCRT. The left femur head dose was 10.6% over 20 Gy in IMRT compared with 18.3% in 3 DCRT. The dose of critical organs (rectum, bladder, and femur head) in IMRT showed to reduce than dose of 3DCRT. The rectum dose over 50 Gy in IMRT was reduced 29.3% than 3DCRT. The bladder dose over 40 Gy in IMRT was similar to 3DCRT. The femur head dose over 20 Gy in IMRT was reduced about 7~8% than 3DCRT.
처음 진단된 식도암 환자에서 기관지 내시경 검사의 의의 및 적응증
김성규,안강현(Kang Hyun Ahn),박재민(Jae Min Park),김영삼(Young Sam Kim),최승원(Seung Won Choi),이준구(Jun Gu Lee),장윤수(Yoon Soo Chang),양동규(Dong Kyu Yang),김세규(Se Kyu Kim),장준(Joon Chang),이원영(Won Young Lee),김충배(Choong Bae 대한내과학회 1999 대한내과학회지 Vol.56 No.1
Objectives : To determine the yield of bronchoscopy for evaluating tracheobronchial spread in esophageal carcinoma and to identify the conditions for bronchoscopy in patients with newly diagnosed esophageal carcinoma, who planned to be operated. Methods : From March 1989 to June 1997, 115 patients with esophageal carcinoma had received bronchoscopy. Bronchoscopic findings were classified into three types : Type I : no definitive endobronchial lesion, Type II : indirect effects(hyperemia and compression), Type III : invasion. CT findings were classified into three classes: Class A : tumor separated from tracheobronchial tree, Class B : abutting tree, Class C : compressing tree. We investigated the correlations of clinical presentation and non-invasive tests (including esophagogram) with bronchoscopic findings. Results : 1) Among 115 patients, bronchoscopic findings were Type I in 67(58.3%), Type II in 34(29.6%), Type III in 14(12.2%). 2) Abnormal bronchoscopic findings are related with length of lesion by esophagogram.(p < 0.05) 3) Class C lesion by chest CT scan were closely correlated with abnormal bronchoscopic findings. 4) Chest symptoms were frequently associated with type III lesion of bronchoscopy Conclusion : We could recommend preoperative bronchoscopy in recently diagnosed as esophageal carcinoma who got more than 2 of 3 variables listed below : 1) patients who had chest symptoms, such as cough with sputum, hemoptysis, and dyspnea 2) length of tumor is long in esophagogram(above 5 cm in length), 3) tracheobronchial compressed lesion by chest CT scan. Bronchoscopy is not needed in cases with no chest symptom, short lesion length(below 5 cm) and normal chest CT finding for preoperative evaluation of esophageal carcinoma.
특허정보를 이용한 무기체계 부품국산화 개발기술 동향조사 및 분석
김성규(Sung-Kyu Kim),최청석(Chung-Seok Choi),최윤혁(Yoon-Hyeok Choi),김진하(Jin-Ha Kim) 한국산학기술학회 2021 한국산학기술학회논문지 Vol.22 No.6
최근 무기체계 핵심부품 개발 필요성 증가 등으로 인해 무기체계 부품국산화 개발사업이 확대되고 있다. 개발된 핵심부품의 국내 무기체계 적용 및 해외시장 진출을 위해 사전 기술동향을 반영한 과제기획이 필요한 실정이다. 이에 본 연구는 무기체계 핵심부품 국산화 대상과제의 특허 조사 및 분석을 통한 부품국산화 개발기술 동향을 도출하였다. 또한 개발기술 동향 분석결과를 과제 선정 시 활용하기 위한 구체적인 방안을 제시하였다. 연구의 세부 추진 방법으로 2019년 선정된 과제 관련 특허를 조사하여, 최초 출원 시점부터 현재까지의 특허의 연도별 출원수, 출원인수를 분석하였다. 이를 종합하여 시계열에 따른 기술시장 성장단계를 도출하였다. 2019년 과제선정 시 산출된 선정기준 가중치를 이용하여 기술시장 성장단계와 부품국산화 과제선정 기준을 양축으로 하는 Matrix를 구성하였다. 각 영역별 배치된 부품국산화 기술의 포트폴리오 분석을 실시하였으며, 그 결과 Matrix 영역별 기술을 배치하고 해당 영역의 종합적인 기술동향을 분석하였다. 향후 효과적인 과제기획을 위해 기술동향 분석결과의 활용을 위한 절차개선 방안을 제안하였으며, 이를 통한 효율적인 과제기획 및 효과적인 국내 방위산업 중소기업 육성지원이 기대된다. Recently, due to the increasing necessity of developing core parts for weapons systems, the project for localization of parts for weapons systems is expanding. In order to apply the developed core parts to the domestic weapon system and advance into the overseas market, it is necessary to plan a project that reflects the technology trends in advance. This study derived trend of technology development through conducting the patent research and analysis. Also, suggested plan for applying the analysis results when project planning and selecting. As a detailed method, patents related to the 2019 year selection project were investigated. The number of patent applications by year and number of applicants from the time of the first application to the present were analyzed. And the growth stage of the technology market was derived. The comprehensive result was derieved through the portfolio analysis by arranging the parts localization technology in each area of the matrix consisting of market growth stage and the criteria for the selection of parts localization project. This research suggested the applying plan for improving project selection process. we expect the promotion of defense industry and the effective task planning.
포터블 배터리 및 OBC를 활용한 포터블 B2V 충전 시스템
최재혁(JaeHyuk Choi),송병섭(ByeongSeob Song),김성규(SungKyu Kim),김달철(TalChol Kim),조인영(InYoung Cho),최영곤(YoungGon Choi),정희원(HeeWon Jung) 한국자동차공학회 2021 한국자동차공학회 부문종합 학술대회 Vol.2021 No.6
As electric vehicles become more widespread, the development of mobile charging systems has been actively developed to improve charging convenience. A typical mobile charging system requires a battery for storing electrical energy, as well as a power converter with a large volume and weight. Therefore, there is a limitation in that the overall size or weight is increased and mobility or portability is poor. In this paper, we propose a battery-to-vehicle mobile charging system that does not require a separate power converter by utilizing the On Board Charger in an electric vehicle. The battery-to-vehicle charging system has the effect of reducing cost and reducing size because the power converter can be removed from a typical mobile charging system.
최용규(Yong Kyu Choi),최일생(Il Saing Choi),김성규(Sung Kyu Kim),김홍길(Hong Gill Kim),채응석(Eung Suk Chai) 대한소화기학회 1972 대한소화기학회지 Vol.4 No.1
N/A Intrahepatic stone is a disease characterized by recurrent bi]iary colic and higher incidence in Asians than in Caucassians. There are various diagnostic methods for intrahepatic stone, but none are entirely satisfactory except surgical exploration. Since liver scan was introduced by Stirrett, +t aL in 1953, it has been used in the diagnosis of liver diseases such as space occupying lesions, cirrhosis of liver and others. The present study was done to assess the diagnostic value of liver scan in intrahepatic stone. Liver scan was performed on 15 of 28 cases of intrahepatic stone confirmed by operation at Severance Ho- spital, Yonsei University College of Medicine, from January 1969 to June 1971, and ivas compared with those in 17 among 94 cases of other biliary stone. The results were as fo]lows: 1, The incidence of intrahepatic stone in hepatobiliary stone was 22. 9%, the ratio of male to female- was 1: l. 3 and the range of age was 23 to 73 with the mean age of 45. 2, In liver function tests, there were significant increases in the values of total bilirubin, total cholesterol and alkaline phosphatase in both intrahepatic stone and common bile duct stone, while serum albin was low (2. 9+-0. 5gmgy) in intrahepatic stone only. 3. In )iver scan, the characteristic findings of intrahepatic stone were cold areas, mottling and dec- reased uptake, whereas in other biliary stone, the findings were almost normal. The size of cold and . Mottling areas varied from a few mm to a cm, and their location coincided with the site of stones at operation.