PC를 이용한 웹 기반 원격 방사선 인터넷 PACS 설계 및 구현

지연상,김승국,한재진 광주보건대학 2001 論文集 Vol.26 No.-

This study can get the result below with the embodiment of INTERNET- PACS system. 1. This study is to embody the INTERNET-PACS that can use the main functions of high-priced PACS that can be used in the general small hospitals by the embodiment on the general PC. And it made the burden about the additional expenses decreasing at maximum by the development of DICOM converter algorithm and by the interlock with the existing devices. 2. Also it could expand the PACS in stage as well as it made the information transmission in the hospitals through the network easy at the same time with the share of the client and the server on a system. 3. The embodied INTERNET-PACS system have advantages that have independent image management and operation system and that can make the system more flexible in its embodiment because the standard protocol is used in the internet recently.

태권도 연구경향과 방향성 대한 연구

지치환,윤상화,조임형 龍仁大學校 武道硏究所 1997 武道硏究所誌 Vol.8 No.2

The purpose of this study was to investigate the rescarch pattern and trends of Tae Kwon Do researches. Hundred ten papers were analysised for this purpose and the analysis were devided two categories. The first category was analysis of subject in Tae Kwon Do research. The second category was analysis of object in Tae Kwon Do research. From the analysis, result were made as follows; 1. Analysis of subject in Tae Kwon Do research. The researches which treat physiological factor were 26.4%, the researches which treat techniques for compitition were 25.5%, and the researches which treat psycological factors were 11.8%. 2. Analysis of object in Tae Kwon Do research. The researches which object compitition were 77.3%, and it contains kicking, physical fitness, point, athlete, division, weight, structure of technique, injury, judge, rules. The researches which object displine were 10% and reality of Tae Kwon Do were only 9%

하지정맥류 평가의 3차원 조영증강 MRV와 Venography의 유용성 비교 연구

지연상,한재진 광주보건대학 2003 論文集 Vol.28 No.-

To assess the performance of contrast-enhanced three-dimensional(3D) magnetic resonance venography(MRV) of the pelvis and lower extremities in patients with varicose vein. Conventional and MR venography were peformed in 14 legs in 14 patients and duplex doppler sonogram and MR venography were performed in 30 legs in 24 patients referred fo revaluation of varicose vein. For analysis, the venous system was divided into 13 segment in Conventional and MR venographic images, For detection of reflux to greater saphenous vein, duplex doppler sonogram and MRV were peformed. In ascending venogram and MRV, 182 venous segments potentially could be seen. MRV depicted 156 segments. 8 segments among depicted segments at MRV were not seen at ascending venogram. Ascending venogram depicted 182 segment. 4 segments among depicted segments at ascending venogram were not seen at MRV. MRV detected 38 varices and ascending venogram detected 34 varices, When two tourniquets were placed around the ankle and knee with valsalva maneuver, MRV detected reflux in 16 legs of 22 legs. Duplex doppler sonogram detected reflux in 26 legs of 30 legs. Contrast-enhanced 3D MRV comprehensively displays the lower extremity venous system and permits assessment of varicose vein. MRV with valsalva maneuver permit assessment of reflux to greater saphenous vein.

CT Scanogram과 FFD에 따른 장골계측촬영의 비교분석과 고찰

지연상,한재진 광주보건대학 2002 論文集 Vol.27 No.-

The accurate measurement for long bone have taken an important part in orthopedics surgical diseases when the length of extremities is different each other because of some disorder. The radiography of long bone measurement is widely being used in medical centers. We also can use various kinds of methods to search for the accurate measurement. In this thesis, we have measured the real length of long bone for CT Scanogram and FFD by 100㎝ and 200㎝ in the angle of inclination 0°, 3°, and 7°. The data can be used to diagnose and treat patients by the comparative analysis.

안전한 장중첩증 공기압정복장치의 제작 및 임상적 이용

지연상,한재진 광주보건대학 2004 論文集 Vol.29 No.-

This study was peformed to design a safe air-pressure reduction system which can absorb rapidly rising intraluminal pressure during intussusception, and comparison with other reduction systems to test its clinical availability. The air-pressure reduction system consisted of a pressure gauge, air insufflators a pressure controller, buffers, and rapid exhaustion devices, and to determine its absorbability, it was connected with a bowel model. By using it in 20 infants with intussusception, we compared the absorbability of our air-pressure reduction system with preexisting systems. While extraluminal pressure was applied to the bowel model in which baseline intraluminal pressure was set to 120mmHg, this rose to 176mmHg(56mmHg high to standard, 100%) in the direct infusion system, but to only 130mmHg (10mmHg high to standard, 17.9%) in a system connected to a large buffer of 10,500㎖ capacity. Immediately after the application of extraluminal pressure for less than 1 sec, this air-pressure reduction system showed better absorbability than the hydrostatic reduction system. Applying this system to 20 infants with intussusception, this was successfully Reduced in 19 cases(95%), without complications. In this experiment, it was proved that the system absorbed rapid intraluminal pressure elevation. Its use would help prevent bowel perforation during air reduction occurring during.

구내 표준 방사선사진을 이용한 구내방사선촬영기의 선질 평가

이상섭,권혁락,심우현,오승현,이지연,전국진,김기덕,박창서 대한구강악안면방사선학회 2000 Imaging Science in Dentistry Vol.30 No.3

Purpose : This study was to evaluate the beam quality of intraoral X-ray equipments used at Yonsei University Dental Hospital (YUDH) using the half value layer (HVL) and the characteristic curve of intraoral standard X-ray film. Materials and Methods : The study was done using the intraoral X-ray equipments used at each clinical department at YUDH. Aluminum filter was used to determine the HVL. Intraoral standard film was used to get the characteristic curve of each intraoral X-ray equipment. Results : Most of the HVLs of intraoral X-ray equipments were higher than the least recommended thickness, but the REX 601 model used at the operative dentistry department and the X-707 model used at the pediatric dentistry department had HVLs lower than the recommended thickness. The slopes of the characteristic curves of films taken using the PANPAS 601 model and REX 601 model at operative dentistry department, the X-705 model of prosthodontic dentistry department, and the REX601 model at the student clinic were relatively low. Conclusion : HVL and the characteristic curve of X-ray film can be used to evaluate the beam quality of intraoral X-ray equipment. In order to get the best X-ray films with the least radiation exposure to patients and best diagnostic information in clinical dentistry, X-ray equipment should be managed in the planned and organized fashion. (Korean J Oral Maxillofac Radiol 2000; 30: 183-188)

골수염으로 발현된 재발성 콕시디오이데스 진균증 1예

백지현,박은영,정윤숙,홍재원,채윤태,진성준,최희경,신소연,한상훈,진범식,김창오,최준용,송영구,조남훈,김준명 대한감염학회 2009 감염과 화학요법 Vol.41 No.4

Coccidioidomycosis is a fungal infection that results from inhaling the airborne arthroconidia of the Coccidioides species. It is an endemic disease in the southwest part of North America and rarely diagnosed in Korea. As tourism to endemic areas and the number of immunocompromised patients have been increasing, the incidence of this infection has increased in non-endemic areas. Treatment is usually successful with antifungal agents; however, recurrence is common. It is difficult to decide when to discontinue the antifungal treatment especially in non-endemic areas where doctors are not familiar with the disease. We report a case of recurrent coccidioidomycosis manifesting as osteomyelitis after the treatment of the patient for disseminated coccidioidal infection. The complement fixation test was a useful tool for the assessment of patient response and to evaluate suspected recurrence.

실험동물에서의 내분비계 교란물질인 DEHP, DBP의 생체내 영향

정지윤,이성호,박영석,박병권,김병수,김상기,박창식,강경선,이영순 충남대학교 형질전환복제돼지연구센터 2007 논문집 Vol. No.10

The major protocol features of the rodent uterotrophic assay have been evaluated using a range of reference chemicals. The protocol variables considered include the selection of the test species and route of chemical administration, the age of the test animals, the maintenance diet used, and the specificity of the assay for estrogens. The rodents were ovariectomized under general anesthesia via bilateral flank incisions and randomly assigned to groups of 5 animals. This study investigated the estrogenic effects of phthalates, which are DEHP and DBP, suspected as endocrine disruptors. It is concluded that three daily subcutaneous administration of test chemicals, which are di-ethylhexyl phthalate(DEHP) and di-n-butyl phthalate(DBP), to 9 week-old rodents. The results revealed that DEHP & DBP show similar uterotrophic activity in the rat and the mouse, using subcutaneous administration. DEHP and DBP failed to affect any of these parameters, which are body weight, mammary gland, vaginal and uterus histopathology. but, DBP increased uterus weight to only one rat of 1.0 g/kg group. The results conform the need for rigorous attention to experimental design and criteria for assessing estrogenic activity.

자일리톨 섭취에 따른 Streptococcus mutans의 글루칸 생성관련 유전자 발현 억제효과

김지혜,이영은,안상헌,최연희,남순현,송근배 大韓小兒齒科學會 2009 大韓小兒齒科學會誌 Vol.36 No.4

본 연구에서는 장기적인 자일리톨의 섭취가 Streptococcus mutans의 대표적인 독성인자 중 하나인 글루칸 생성에 미치는 영향을 알아보기 위하여 글루칸 합성효소인 glucosyltansferase의 mRNA 발현을 실시간 역전사 중합효소 연쇄반응을 통해 평가하여 다음과 같은 결과를 얻었다. 1. 24개월 동안 자일리톨껌을 섭취한 군에서 타액 내 Streptococcus mutans의 colony 수는 통계적으로 유의하게 감소하였다(p<0.05). 2. 비수용성 글루칸 합성에 관여하는 유전자인 gtfB, gtfC의 발현은 자일리톨껌을 섭취한 군에서 시간이 지남에 따라 유의 하게 감소하였다(p<0.05). 특히 gtfB의 발현은 12개월과 24개월째 대조군에 비하여 통계적으로 유의하게 낮았고, gtfC의 발현은 24개월째 대조군에 비하여 통계적으로 유의하게 낮았다(p<0.05). 3. 수용성 글루칸 합성에 관여하는 유전자인 gtfD의 발현 역시 자일리톨껌을 섭취한 군에서 시간이 지남에 따라 유의하게 감소하였다(p<0.05). 또한 gtfD의 발현은 12개월과 24개월째 대조군에 비하여 통계적으로 유의하게 낮았다(p<0.05). 이상의 결과들을 종합해 보았을 때, 자일리톨의 섭취는 구강 내 Streptococcus mutans의 글루칸 합성 관련 유전자들의 발현을 억제시킴으로써 Streptococcus mutans의 수적인 감소를 가져오는 것으로 생각된다. Xylitol has the ability to reduce the adherence of Streptococcus mutans(S. mutans), which can make it easier to remove plaque, decrease acid production and inhibit dental caries. There are few reports on the effects of xylitol on the expression of the virulence related genes in S. mutans. This study examined the inhibitory effect of chewing gum containing xylitol on glucan synthesis related gene expression of S. mutans. Participants were voluntarily recruited for a women's oral health prevention program, classified into two groups(a control and a xylitol group), and then followed for 2 years. Twenty salivary samples were randomly selected from each group. Colony count and real-time reverse transcription polymerase chain reaction were used to analyze the characteristics of S. mutans. The following results were obtained: The S. mutans counts decreased steadily in the xylitol group over the study period(p<0.05). The expression of the virulence related genes (gtfB, gtfC and gtfD) was significantly lower in the xylitol group than in the control groups (p<0.05). In conclusion, these results suggest that chewing xylitol gum for a long period of time may reduce the expression of the genes associated with S. mutans virulence, which can result in a decrease growth of S. mutans colonies as a result.

자기장 속에서 2차원 조셉슨 접합 배열의 상전이

황성진,김지연,최무용 성균관대학교 기초과학연구소 1998 論文集 Vol.49 No.-

We have studied the phase transition of a Josephson-junction array in a magnetic field with the frustration index f = 1/5. The results of our experimental study were found to be quite different from those of the simulation work by Y. H. Li and S. Teitel which show two-step variations of the resistance with the temperature and the dc current and the first-order nature of a phase transition. The experiment revealed one-step variation of the resistance with the temperature above the critical temperature. Thermal hysteresis, an indication of a first-order phase transition, was not observed in the resistance measurements. The resistance was also found to increase in one step with the dc current and to exhibit no hysteresis when the current direction is reversed. Origin of the discrepancy between the results of the experiment and the simulation is discussed.