• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.1
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• pp.1153-1156
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• 2005

PACS system developments for improve of diagnosis efficiency for hospital duty efficiency and patients through various medical image diagnosis device. PACS system studies for nonfilm hospital, but still, image filtering technology Present high accuracy take a photograph image be not enough. On study image processing part is very importance. The fittest of image processing in order to using simple and essential filter try to improvrnent. The future, diagnosis of patients decide accuracy, low cost based Digital XRay system will be using.

• Proceedings of the KIPE Conference
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• 2020.08a
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• pp.397-398
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• 2020

최근 COVID-19(Coronavirus disease, 2019)의 발병으로 정확한 진단을 하기위한 X-ray 검사에 대한 수요가 증가하고 있다. 품질이 높은 수준의 Xray 영상을 얻기 위해서는 X-ray 튜브에 촬영 목적에 맞는 일정한 고전압을 제어를 통해 인가해야 한다. 그러기 위해서는 전력변환장치의 출력전압 특성을 고려하여 설계해야 한다. 따라서 Xray 발생장치에 주로 사용되는 Cockcroft-Walton Voltage Multiplier를 사용하여 다이오드의 기생커패시턴스 성분이 변압기의 누설 인덕턴스 성분, 회로의 기생 인덕턴스 성분과 공진현상을 일으켜 발생하는 출력전압의 특성 변화에 대한 시뮬레이션을 개발하고 분석 하였다.

• Journal of International Academy of Physical Therapy Research
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• v.4 no.2
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• pp.625-632
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• 2013

This study was to investigate the needs of the functional abnormality of the Temporomandibular joint. The purpose of this study was to find out basic concept for the Chiropractic-care necessity of the neuromuscular skeletal patients with functional abnormality of the temporomandibular joint. I evaluated the change of the range of motion, neck pain, headache by post xray, orthopedic test and patient's charts. The range of motion at temporomandibular joint was improved and the necessity of chiropractic care was recognized in the neuromuscular skeletal patients with having temporomandibular joint problems.

• The Korean Journal of Nuclear Medicine
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• v.19 no.2
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• pp.101-103
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• 1985

Azygos system, one of the main collateral vessels which communicates superior vena cava with inferior vena cava, is well visualized by Xray angiography. This system is rarely demonstrated by radioisotope study. We report a case whose azygos system was shown during $^{99m}Tc-DTPA$ renal scanning.

• Electrical & Electronic Materials
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• v.4 no.3
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• pp.239-248
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• 1991

반응성 마그네트론 스파트링 프로세스의 제작 및 특성과 이 프로세스에 의해 작성된 질화알미늄 박막에 대하여 서술하였다. 마그네트론에서 자계와 압력변화에 따른 글로우 방전특성을 구하였고 이 때 발생된 플라즈마의 전자온도 특성을 구하였다. 저기압($10^{-3}$~$10^{-4}$ torr)에서도 안정된 방전으로 스파트링을 수행할 수 있었으며 이 스파트링에서 제작된 조건에 따른 질화알미늄 박막의 형성조직을 SEM사진과 Xray회절에 의하여 분석하였다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.14 no.3
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• pp.199-208
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• 2014

At present, the effect of oriental treatment system is proved in the west and using the data of tongue and pulse of body, the doctor can decide the patient's body state without Xray and CT data of large machines. In this paper, the patient's medical data is transmitted to the doctor and the real time decision algorithm is developed and so the doctor can decide the medical treatments. Using the mobile phone, the pulse data and bio data can be sent to the doctor and therefore the patients, who can't care in real time, can be treated in real time in the impossible medical treatment areas. Therefore in this paper, the oriental medical treatment system algorithm and artificial intelligence electrical needle simulation are processed for real time and checked and treated, so anyone can decide patient's state using mobile phone.

• Radiation Oncology Journal
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• v.2 no.2
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• pp.271-280
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• 1984

The peripheral dose, defined as the dose outside therapeutic photon fields, which is responsible for the functional damage of the critical organs, fetus, and radiation. induced carcinogenesis, has been investigated for $^{60}Co\;\gamma$ ray and 10 MV Xray. It was measured by silicon diode controlled by semiautomated water phantom without any shielding or with lead plate of HVL thickness put horizontally or vertically to shield stray radiations. Authors could obtain following results. 1. The peripheral dose was larger than $0.7\%$ of central axis maximum dose even at 20cm distance from field margin. That is clinically significant, so it should be reduced. 2. Even for square fields of 10 MV Xray, radial peripheral dose distribution did not coincide with transverse distribution, because of the position of collimator jaws. 3. Between surface and $d_m$, the peripheral dose distributions show a pattern of the dose distribution of electron beams and the maximum doss was approximately proportional to the length of a side of square field. 4. The peripheral doses depended on radiation quality, field size, distance from field margin and depth in water. Distance from field margin was the most important factor. 5. Except for near surface, the peripheral dose from phantom was approximately equal to that from therapy unit. 6. To reduce the surface dose outside fields, therapist should shield stray radiations from therapy unit by lead plate of at least one HVL for 10 MV X-ray and by bolus equivalent to tissue of 0.5cm thickness for $^{60}Co$. 7. To reduce the dose at depth deeper than $d_m$, it is desirable to shield stray radiations from therapy unit by lead.

• Bulletin of the Korean Chemical Society
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• v.33 no.2
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• pp.449-452
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• 2012

A polyaniline-gold composite was prepared via the polymerization of aniline hydrochloride with or without water-soluble graphite oxide using auric acid as an oxidant. The reaction products were characterized using Xray photoelectron spectroscopy. The thermal stability and embedded crystallinity of the composites were also investigated using thermogravimetric and X-ray diffraction analyses. The electrical properties of the composites were examined using cyclic voltammetric measurements at room temperature and temperature-dependent DC conductivity within 300-500 K. Compared to pure graphene oxide and polyaniline-gold composite, the polyaniline-gold-graphene composite exhibited higher crystallinity and thermal stability, and higher current density response under equivalent conditions.

• Bulletin of the Korean Chemical Society
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• v.32 no.4
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• pp.1331-1335
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• 2011

We report the results of the characterization of Cu oxide thin films deposited by radio frequency (r.f.) magnetron sputtering at different annealing temperatures. The deposited Cu oxide thin films were investigated by scanning electron microscopy, spectroscopic ellipsometry, X-ray diffraction, atomic force microscopy, Xray photoelectron spectroscopy, and contact angle measurements. The thickness of the films was about 180 nm and the monoclinic CuO phase was detected. The $CuO_2$ and $Cu(OH)_2$ phases were grown as amorphous phase and the ratio of the three phases were independent on the annealing temperature. The surface of Cu oxide films changed from hydrophilic to hydrophobic as the annealing temperature increased. This phenomenon is due to the increase of the surface roughness. The direct optical band gap was also obtained and laid in the range between 2.36 and 3.06 eV.

• Journal of radiological science and technology
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• v.24 no.1
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• pp.67-73
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• 2001

In digital image processing, the homomorphic filtering approach is derived from an illumination-reflectance model of the image. It can also be used with an illumination-transillumnation model of X-ray film. Several X-ray images were applied to enhancement with histogram equalization and homomorphic filter based on an illumination-transillumination model. The homomorphic filter has proven theoretical claim of image density range compression and balanced contrast enhancement, and also was found a valuable tool to process analog X-ray images to digital images.