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- 저자 : 박창윤(Chang Yoon Park) (검색결과 16 건)
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만성 두부외상 환자에서 99mTc - HMPAO Brain SPECT의 임상적 유용성
서정호(Jung Ho Suh),김동익(Dong Ik Kim),정태섭(Tae Sub Chung),이종두(Jong Doo Lee),박창윤(Chang Yoon Park),정진일(Jin Ill Chung),김영수(Young Soo Kim) 대한핵의학회 1992 핵의학 분자영상 Vol.26 No.1
N/A Minima1 deterioration of cerebral perfusion or microanatomical changes were undetectable on conventional Brain CT or MRI. So evaluation of focal functional changes of the brain parenchyme is essential in chronic head injury patients, who did not show focal anatomical changes on these radiological studies. However, the patients who had longstanding neurologic sequelae following head injury, there had been no available imaging modalities for evaluating these patients precisely. Therefore we tried to detect the focal functional changes on the brain parenchyme using Tc-99m-HMPAO Brain SPECT on the patients of chronic head injuries. Twenty three patients who had suffered from headache, memory dysfunction, personality change and insomnia lasting more than six months following head injury were included in our cases, which showed no anatomical abnormalities on Brain CT or MRI. At first they underwent psychological test whether the symptoms were organic or not. Also we were able to evaluate the cerebral perfusion changes with Tc-99m-HMPAO Brain SPECT in 22 patients among the 23, which five patients were focal and 17 patients were nonfocally diffuse perfusion changes. Thus we can predict the perfusion changes such as local vascular deterioration or functional defects using Tc-99m-HMPAO Brain SPECT in the patients who had suffered from post-traumatic sequelae, which changes were undetectable on Brain CT or MRI.
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장중첩증이 (腸重疊症) 동반된 대장지방종 (大腸指肪腫)
박인서 ( In Suh Park ),박찬일 ( Chan Il Park ),이경식 ( Kyung Sik Lee ),김기황 ( Ki Whang Kim ),최흥재 ( Heung Jae Choi ),양주영 ( Joo Young Yang ),박창윤 ( Chang Yoon Park ),윤용광 ( Yong Dwang Yoon ) 대한소화기학회 1982 대한소화기학회지 Vol.14 No.1
Excluding adenomataus polyps, lipomas represent the most common benign tumor of the colon. But lipomas of gastrointestinal tract are rarely encountered, and when seen they are usually an incidental finding at autopsy or operation. When small, these tumors are frequently asymptomatic. Constipation and colicky abdominal pain in wax and wane pattern are frequent symptoms in the larger tumor and intussusception is the main complication of the lipomas. A few hundreds of gastrointestinal lipomas were reported in the world, but only 6 cases of it were found in the literature in Korea. A case of lipomas in colon associated with intussusception in a 36-year-old woman and a brief review of the literature were presented.
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$Al_2O_3$ 열형광(熱螢光) 특성(特性)을 이용(利用)한 감마선(線)의 측정(測定) 및 임상응용(臨床應用)
추성실,박창윤,Chu, Seong-Sil,Park, Chang-Yoon 대한방사선방어학회 1984 방사선방어학회지 Vol.9 No.1
The properties of $Al_2O_3$ thermoluminescent phosphor have been observed to apply for gamma dosimetry in vivo. Glow peaks at 380, 420, 490 kelvin temperature with emission in the blue region have been detected and calculated as 1.4 eV the activation energy by means of heat response rising time method. Sensitization and supralinearity in $Al_2O_3$ phosphor could be consistently explained by the deep trap model. Studies of the thermoluminescence growth rate with gamma ray exposure showed linearly to $10^4$ Roentgen and then supralinear rate detected 1.2 power of exposure dose sensitization of $Al_2O_3$ is described five times more than TLD-100 and the fading time is shorter and then tried to apply for gamma dosimetry in vivo.
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정동훈,송윤구,강일모,박창윤,Chung, Donghoon,Song, Yungoo,Kang, Il-Mo,Park, Chang-Yoon 대한자원환경지질학회 2013 자원환경지질 Vol.46 No.1
본 연구에서는 배경값 보정 및 크기보정을 포함하여 오차요인을 크게 줄이고, WILDFIRE(C)를 통해 최적화된 이론값과 실측값의 일치정도 (R%, (${\sum}$|이론값-측정값|/이론값)/$n{\times}100$)를 정량값으로 제시하고, 그 값을 최소화하는 반복과정을 통해 일라이트 폴리타입 함량을 정량하는 개선된 full-pattern-fitting법을 제안하여 일정 함량을 갖는 혼합시료를 대상으로 검증하고, 기존의 Grathoff and Moore법과 비교하였다. 개선된 full-pattern-fitting법은 대상시료 내 불순물로 인한 각 폴리타입 함량오차에도 불구하고, 기존의 full-pattern-fitting법 보다 개선된 최대 3.6% 이내의 오차를 보였다. Grathoff and Moore법과의 비교에서 대상시료 모두에서 Grathoff and Moore법 적용결과는 $2M_1$ 폴리타입의 상대함량이 고평가되어 나타났으며, 이용한 피크별 매우 큰 정량값 차이를 보이는 반면, 본 연구의 개선된 full-pattern-fitting법 적용 결과는 10% 이내의 낮은 R% 값을 갖는 폴리타입 상대함량값을 보이는 것으로 나타나, 높은 신뢰도의 정량결과를 제공할 수 있음을 확인하였다. We proposed the revised full-pattern-fitting method of illite polytype quantification with background correction and scale factor correction of WILDFIRE(C) simulated pattern, and R% value ((${\sum}$|simulated-measured|/simulated)/ $n{\times}100$) calculation, and then verified the reliability of this method by applying for the test sample ($2M_1$:1M$$\frac{._-}{.}$$1:1), and by comparing the result with Grathoff and Moore method (1996). We confirmed that the proposed method showed the error range of less than 3.6%, which is much lower than the previous full-pattern-fitting methods, in spite of the impurities of the test sample. In the comparison with Grathoff and Moore method for 2 tested samples, we obtained the relatively higher $2M_1$ contents using Grathoff and Moore method, whereas we obtained the reliable results with less than 10% of R% values.
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백혈병 환자에서 골수주사를 이용한 골수침범 유무의 평가
이종두(Jong Doo Lee),박창윤(Chang Yoon Park),조재현(Jae Hyun Cho),김명준(Myoung Joon Kim),김길영(Kill Young Kim),김용수(Yong Soo Kim) 대한핵의학회 1993 핵의학 분자영상 Vol.27 No.2
N/A To esimate the bone marrow involvment of leckemia, we performed sciutigraphies using 99mTc antimony sulfide colloid and gallum-67 and compared with bone marrow aspiration biopsy and clinicolaboratory datas. 99mTc Antimony scan showed localized defect in 4 patients who had relapse. No false positive or negative results were observed. Gallium 67 showed localized increased uptake in 2 of 4 relapsed patients. Therefore, bone marrow scan is useful for the evaluation of marrow infiltration in jeukemic patients.
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김진 ( Jin Kim ),이세구 ( Se Koo Rhee ),박창윤 ( Chang Yoon Park ) 서울시정개발연구원 2010 연구보고서 Vol.2010 No.41
PFI (Private Finance Initiative) development projects managed by Seoul Metropolitan Government (SMG) can be categorized, on the grounds of depending laws, into two types: the one is PFIs driven by ``Act on Public-Private Partnerships in Infrastructure (Act on PPPI)`` (PPP PFIs) and the other covers PFIs based upon relevant laws to the types and characteristics of facilities (RL PFIs). Since PPP PFIs are progressed in accordance with the standards and guidelines systemized by the MOSF (Ministry of Strategy and Finance), their procedure is clear and their management is relatively integrated. On the contrary, RL PFI projects are physically regulated by respective facility laws while their approaches are legitimated by ``Act on Public Property and Commodity Management (Act on PPCM)``. This endogenous feature of two-track regulation upon RL PFIs has entailed the problem of a consistent application of law and the absence of a single administrative body`s effective management: which have increased the need for a city-level integrated system to stipulate the standard procedure and management of RL PFI projects. This study aims at surveying the current condition of RL PFI projects planned or propelled by SMG, analyzing the practical problems to manage RL PFIs integrately on the city level and proposing a schematic program for SMG`s unified management system of RL PFIs. The proposed management system is expected to contribute to guiding the bureaus and departments in SMG which plan RL PFIs in the near future and enhancing the credibility and efficiency for SMG to drive PFI projects. Also, the study suggests some methods to monitor the project body`s performance as well as evaluate the effect of PFIs based upon the ex-post project information, as to improve SMG`s future PFI projects. SMG`s business approaches to RL PFIs, regulated by Act on PPCM, are roughly divided into two ways: BTO (Build-Transfer-Operate) scheme and land lease. With the former approach, the project body invested by the private entities(and the city, if necessary) finances the project cost, builds the object infrastructure, transfers the ownership of facility to the city and operates it during a specific period. Usually, project site is a city-owned property thus all the project body can possess is the right to operate the facility during the project period. In the latter scheme, the body finances the project cost and builds the object infrastructure in the same way. It does not, however, transfer the ownership of facility but sustains it by the end of the project. Instead, it signs a land lease agreement for the city land and pays the land rent from the start of construction to the end of project. Also, RL PFIs can be grouped by entity: who proposes a target project. One way is that the city plans a project and requests the private consortiums` proposals while another is that a private entity offers a PFI project and the city accepts that. Usually, PFI projects are not defined as the objects of ACT on PPPI thus difficult for SMG to ask PIMAC (Public & Private Infrastructure Investment Management Center), an affiliated organization of MOSF, to review the project feasibility, which makes it problematic to confirm the validity of project. Also, the project size and/or budget size granted by the central government is under the hurdle of preliminary feasibility study, mandatorily requested to PIMAC. In the beginning of 2010, the number of RL PFIs driven by SMG was 10 but two projects were suspended or discontinued thus the current number of projects is 8 at the end of October, 2010. The facilities of RL PFIs have the feature of infrastructure to improve the citizens` quality of life but are not defined in ACT on PPPI. So the bureaus and departments to plan RL PFIs feel difficulty to find an external organization to confirm the feasibility of city plan or evaluate the proposal offered by the private entity. Unlike PPP PFIs, SMG has yet to prepare the project manual for officials, which makes the officials with limited expertise and knowhow regarding PFI perceive the practical problems in the process. In some cases, they find legal issues, the vagueness of grounds of administrative activities. For example, they want to know if SMG can allow the public permission for project facility, transfer of its ownership and site use for its construction and operation. Also, in the stage of action, they may find difficulty to trust an institution of public confidence with the review of action plan, the selection of best proposal offered by private consortiums and the negotiation of project conditions with the private counterpart. After signing a project agreement with the project body, usually an SPC (Special Purpose Company), SMG needs to monitor the body`s contract performance which requires SMG prepare a checklist in turn. Dividing the whole project period into four stages (Plan, Action, Execution and Operation), this study designs an integrated management system for SMG to plan, execute, monitor and evaluate a RL PFI project. In the first stage, it is recommendable for SMG to request an outside professional institute, including PIMAC and SDI(Seoul Development Institute), to review the feasibility of a city-planned project or evaluate the qualification of a plan proposed by a private entity. The study also proposes that the projects more than one hundred billion Won or assisted by the city budget should be reviewed by the Committee of City Budget Planning (CCBP) in SMG. In the ``Action`` stage, SMG needs to prepare a manual for the PFI process, for which this study draws some basic flow charts. It also recommends that SMG ask external entities to evaluate the private`s project proposals, negotiate the terms and conditions of project for the benefit of the city and review the fitness of project agreement. Even in this stage, it seems rational that CCBP scrutinizes the projects, sizable or demanding the city budget. To assist the city officials who want to monitor the fulfillment of project agreement in the stage of Execution, this study arranges a sample checklist based upon the Standard BTO Project Agreement provided by MOSF. It focused on the project body`s timely financing project cost and fulfilling its duty on agreement as well as SMG`s methods to monitor the construction process and perceive any potential risk in advance. In the last stage of Operation after the completion of infrastructure construction, the officials in charge of the project need to evaluate the achievement of planned goals, cost and facility size as well as the effect of project, citizens` benefits and the absorption of market demand. Moreover, it is necessary to monitor the operation of facility and check the financial status of project body. The study suggests that all the RL PFIs be evaluated after three year of completion, regarding not only project performance and impact but its operation condition. It seems more desirable that all the projects with the size more than one hundred billion Won or funded by the city budget should be reevaluated in every five year after first evaluation, with only respect to its operation performance, Finally, this study, to support the review and evaluation processes, suggests that the city need to consider to establish a new organization to fully devote to screening public investment as well as PFIs, evaluating project feasibility and accumulating relevant research data to assist decision makers. The importance and necessity of the organization has also been stressed by the previous studies of SDI.
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