• Transactions on Electrical and Electronic Materials
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• v.9 no.3
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• pp.116-119
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• 2008

The purpose of this study is to develop the Photodynamic Therapy Equipment for medical treatment. We developed the equipment which was helpful in palpating wound healing by using 525 nm LEDs. The equipment was assembled with a micro-controller and green color LEDs, and designed to enable us to control light irradiation time, intensity and so on. In this study, the designed device was used to find out how 525 nm LEDs light affected the skin wound of SD-Rat(Sprague-Dawley Rat). We divided the participants into two groups; irradiation group which was irradiated one hour a day for 9 consecutive days, and none irradiation group. The results showed that the study group had lower incidence of inflammation and faster recovery, compared with the control group.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.56 no.11
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• pp.1947-1954
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• 2007

This paper describes the development of a high-performance single-phase line-interactive Dynamic voltage Restorer, which is composed of an H-bridge inverter and super-capacitors. The operational feasibility was verified through computer simulations with PSCAD/EMTDC software, and experimental works with 3kVA prototype. The developed system can compensates the input voltage sag and interruption within 2ms, in which the maximum allowable duration of voltage interruption is 1.5 seconds. It can be effectively used to compensate the voltage interruption in the sensitive load, such as computer, communication equipment, automation equipment, and medical equipment. The developed system has a simple structure to be easily implemented with commercially available components and to be highly reliable in operation.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.160-161
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• 2007

This paper describes the development of a single-phase DVR(Dynamic voltage Restorer), which is composed of H-bridge inverter and super-capacitors. The operational feasibility was verified through computer simulations with PSCAD/EMTDC software, and experimental works with 3kVA prototype. The developed system can compensates the input voltage sag and interruption within 2ms, in which the maximum allowable duration of voltage interruption is 1.5 seconds. It can be effectively used to compensate the voltage interruption in the sensitive load, such as computer, communication equipment, automation equipment, and medical equipment. The developed system has a simple structure to be easily implemented with commercially available components and to be highly reliable in operation.

• Proceedings of the Korean Society of Medical Physics Conference
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• 2006.08a
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• pp.27-27
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• 2006

• Korean journal of aerospace and environmental medicine
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• v.30 no.1
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• pp.1-2
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• 2020

In commemoration of Vol. 30, Issue 1, our journal prepares four review articles and two original papers. The first review article provides guidelines for medical treatment for emergencies in an aircraft furing flight. This guideline addresses the resources and medical equipment available to physicians on board, common medical conditions, how to deal with them, including legal issues. The second review article covers historically meaningful animals that have contributed to aerospace research and the role of a veterinarian. The third one describes cardiovascular, musculoskeletal, and vestibular physiological effects of microgravity on the human body. As we are about to enter an aging society, the fourth review article introduces guidelines for safe overseas travel for senior passengers. The role of the aviation medical examiner is to maintain aircrew's health and to help them work long and healthy. In this regard, Choi et al. analyzed the physical examination data and sick leave data of an airline. Han et al. investigated the aerospace medical examination data of the Republic of Korea and suggested a solution to some common health problems of the crew.

• Korean journal of aerospace and environmental medicine
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• v.30 no.1
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• pp.3-17
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• 2020

The cabin environment has many physiological effects on commercial aircraft passengers and medical providers, and environmental stress factors exist. Therefore, it is important for medical providers to understand the effects of aviation physiology and cabin environment on the human body. It should also be remembered that these physiological changes and environmental stress factors can affect passengers as well as flight crew and also medical equipment. Providing medical assistance during a flight offers a number of unique challenges including lower cabin pressure, tight quarters, crowded conditions, and loud background noise. The purpose of this Korean guideline is to offer an overview on various in-flight emergencies that could be anticipated and to outline treatment priorities.

• Korean Journal of Digital Imaging in Medicine
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• v.14 no.1
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• pp.21-29
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• 2012

The purpose of this study is to evaluate the mutual relations by measuring SNR from T2 weighted image and ADC values on the basis of the stiffness values from liver tissues. This study was conducted that total 37 people(23 of males and 11 of females) were taken the liver MRI examination and average age was $54.5{\pm}12.7$ years old. The equipment was MAGNETOM Skyra 3.0T (SIEMENS, Erlangen, Germany) and 32 channel body-array coil. The examination were conducted with HASTE T2 weighted image by axial plane, Spin-echo EPI (echo planner image) DWI (b-value = 800) and Magnetic resonance elastography. The ROIs (region of interest: 200-300 $mm^2$) were established on the basis of the first axial stiffness image corresponded 95% confidence interval from axial stiffness image and then were measured values. After drawing the grid lines, signals were measured SNR from T2 weighted image and ADC values on the same locations that were analysed other 3 planes respectively. The results were showed correlation (0.057) that were increased to SNR from T2 weighted image by increasing stiffness value that no significant difference statistically p = 0.003. Other results were showed correlations (-0.301) that were decreased to ADC values by increasing stiffness values that no significant difference statistically p = 0.088. In the 3.0T equipment, the results may be error in much the same fashion as the 1.5T from ADC values by evaluation of fibrosis stage. However, Magnetic resonance elastography would be useful method that is used to diagnose exactly liver fibrosis stages in the 3.0T.

• The Korean Journal of Health Service Management
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• v.11 no.3
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• pp.129-144
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• 2017

Objectives : To review a Tanzanian medical engineering education program and determine improvement measures for the Official Development Assistance (ODA) healthcare projects. Methods : A consultation of the Tanzanian medical engineering education program funded by the National Research Foundation of Korea (NRFK) was reviewed. An on site survey, an environmental analysis, and in-depth interviews were performed. Results : Survey results highlighted a lack of medical device education and the low operating rate of medical equipment. The need to establish educational program was thus confirmed. The expansion of healthcare facilities appeared to be limited within the current medical management system. A master coursework plan for Tanzania medical engineering was developed. Conclusions : The needs of medical engineering education were recognized. A plan and curriculum were developed. The medical engineering education program should be planned and budgeted prior to the ODA healthcare program.

• The Korean Journal of Health Service Management
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• v.7 no.3
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• pp.203-212
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• 2013

Medical devices separated by a committee of the International Electrotechnical Commission IEC TC (Technical Committee) 62 medical electrical equipment being promoted by the International standards. Actually, a lot of standards were existed, but many national and international standards for medical devices were lacking in practical standards that can be applied to their development. Most international standards were focused in electrical and mechanical safety of medical devices. Therefore, there were few practical standards which contain essential performance evaluation. Although medical device regulations do not enforce a fixed lifecycle model, activities are presented in a sequential manner, thus hinting at a waterfall process. Meanwhile, for a decade or more, software teams have benefitted from agile development methods. Several medical device manufacturers have adopted agile practices while keeping development in compliance with regulations, but conflicts arise and decisions have to be taken in favor of agility or formality. However, if there are new practical standards of medical devices, it must be possible to promote the medical devices industry in their nation. To do this, there is a need to develop a new standard could apply to the international market through the analysis of the medical device related technology. Consequently, new standards such as NP (New proposal) or NWIP (New Work Item Proposal) should be developed through international standardization of medical device technology.

• Journal of Biomedical Engineering Research
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• v.42 no.1
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• pp.7-17
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• 2021

In the case of domestic medical device advertisements, it is possible to proceed with the advertisement after medical device certification, and pre-deliberation is possible based on the medical device technical document. However, there are some medical device advertisements that stakeholders in administrative procedures have no choice but to misunderstand in customs and laws that do not consider users. In addition, medical equipment and the pre-deliberation system were judged to be unconstitutional, and unconstitutional decisions were made in accordance with the principle of prohibiting pre-censorship based on the Constitution. This is because in domestic medical device advertisements, structural contradictions and user damage occur in the central structure of each stakeholder. It is necessary to reestablish stakeholder relationships, increase water solubility from customs and laws, and seek new policy proposals. In this study, we reestablish relationships with stakeholders by applying the Autopoiesis theory, and present the grounds and directions that can prevent hype and misidentified advertisements through the establishment of user-centered policies, and the measures to be taken by the Constitutional Court unconstitutional decision.