• Title/Summary/Keyword: 방사선관련

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Interrelationships between occlusal plane angle and vertical skeletal patterns of skeletal Class III malocclusion individuals (골격성 III급 부정교합자의 수직적 안면골격형태와 교합평면과의 관계)

  • Jung, Woo-Joon;Son, Woo-Sung;Kim, Yong-Deok;Kim, Seong-Sik
    • The korean journal of orthodontics
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    • v.37 no.4
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    • pp.260-271
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    • 2007
  • The purpose of this study was to evaluate the relationships between the occlusal plane angle and craniofacial skeletal pattern in relation to anterior overbite. Methods: Lateral cephalograms of 90 adults with skeletal class III malocclusions were traced and measured to analyze skeletal factors and occlusal plane angles. In terms of anterior overbite, all patients were classified into 3 subgroups of positive overbite, edgebite, and negative overbite groups. All measurements were evaluated statistically by ANOVA and Duncan's Post Hoc, and correlation coefficients were evaluated among measurements. Results: In this study, some skeletal measurements (saddle angle, articular angle, Y axis, AFH, SN-FH, SN-Mn, FH-Mn) showed a significant difference among the 3 groups in relation to overbite changes. Correlation coefficient showed that PFH/AFH, SN-Mn, Mx-Mn, and FH-Mn showed a significant difference with FH-Occ, Mx-Occ, and Mn-Occ. Regression analysis showed that Mx-Mn had a determination coefficient of 0.714, 0.560, and 0.677 in relation to FH-Occ, Mx-Occ, and Mn-Occ, respectively. Conclusion: This study suggests that consideration of the occlusal plane in relation to the maxillomandibular vertical skeletal state enable the establishment of a more predictable orthognathic surgery result.

Maturation of cervical vertebrae and Mandibular growth changes (경추골 성숙지표와 하악골 성장)

  • Bae, Jin-Hee;Pank, Hyo-Sang;Sung, Jae-Hyun
    • The korean journal of orthodontics
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    • v.27 no.3 s.62
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    • pp.481-492
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    • 1997
  • In order to investigate the possibility of using a cervical vertebral maturation indicator as a mandibular growth indicator, the relationship of cervical vertebral maturation and mandibular & body height growth changes was assessed in biennial serial lateral cephalometric radiographs of eighteen korean male and fourteen korean female while they were 8.5 to 18.5 years old. The following results were obtained. 1. It was a reliable method to evaluate skeletal maturation by using cervical vertebrae. 2. In general, cervical vertebral maturation stages of females were higher than those of males at the same age and there were significant differences in statistics at the age of 10.5, 14.5. 3. The age of a female at the same cervical vertebral maturation stage were earlier than that of a male. 4. In the case of males, significant Ar-Gn increases were found between stage 3 and 4,5; Ar-Go increases between stage 4 and 5. 5. In the case of females, significant S-Gn and Ar-Gn increases were (end between stage 3 and 4. 6. Significant body height increases were found between stage 3 and 4 in both sexes. 7. The peak velocity of body height and mandibular length was observed between cervical vertebral maturation stage 3 and 4 in both sexes. 8. The relationship between mandibular & body height changes and specific maturation stage of cervical vertebra was found, therfore using a cervical vertebral maturation indicator as mandibular growth indicator is quite within realms of possibility.

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A study on the accuracy of profile change Prediction by video imaging (Power Ceph $^{\circledR}Ver$ 3.3) in Class III two jaw surgery patients (골격성 III급 부정교합을 가진 양악 수술 환자의 술후 측모 예측을 위한 Video imaging (Power $Ceph^{\circledR}$ Ver 3.3)의 정확도에 관한 연구)

  • Kwon, Mi-Jeong;Baik, Hyoung-Seon;Lee, Won You
    • The korean journal of orthodontics
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    • v.29 no.3 s.74
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    • pp.285-301
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    • 1999
  • There is a need for more accurate prediction in surgical orthodontic treatment. Video imaging is an important technology in planning orthognathic surgery and educating patients about the esthetic results after treatment. Preoperative and postoperative lateral cephalogram of 30 patients who had one piece Le Fort I osteotomy advancement and mandibular set back by bilateral intraoral vertical ramal osteotomy with or without genioplasty were used in this study. The computer generated soft tissue line drawing prediction were compared with the actual postoperative cephalograms .The results are as follows. 1. 14 variables showed Statistically significant differences from 24 variables between computer predicted profile and post operative profile 2. Most of the differences were found in the maxilla-related soft tissue landmarks. 3. The predicted results were more accurate in the groups who had small amount of mandibular set back. 4. The predicted results were more accurate in the groups who had no genioplasty. Most of these differences were within 2mm ranges. Therefore profile change prediction by video imaging could be considered clinically acceptable.

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Protective Effect of Green Tea Extract, Catechin on UVB-Induced Skin Damage (녹차추출물 성분 catechin이 자외선에 의해 손상된 피부에 미치는 영향)

  • 이은희;이종권;홍진태;정경미;김용규;이선희;정수연;이용욱
    • Journal of Food Hygiene and Safety
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    • v.16 no.2
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    • pp.117-124
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    • 2001
  • The main constituent of green tea, catechins have been reported to have numberous biological anti-vites including antimutagenic, antibacterial, hypocholesterolemic, antioxidant and antitumor properties. In the present study, we examined the protective effect of catechin on UVB-induced skin damage. Catechin (3 mg/mouse) was topically treated to dorsal area of SHK-1 hairless mouse daily for 2 weeks. UVB (100 mJ/$\textrm{cm}^2$) was also treated soon after application of catechin alone or with catechin for 2 weeks. Catechin reduced UVB-induced infiltration of inflammatory cells, fibrosis of cells and collagen-fiber formation. In addition, catechin also prevented UVB-induced DNA fragmentation and apoptosis cell number, but not changed p53 level. Furthermore catechin inhibited UVB-induced cell proliferation. There results showed that catechin have preventive effect aganinst UVB-induced skin damages. and these effects could contribute to the antitumor promoters activity.

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Trend of Prevalence of Pulmonary Tuberculosis Among Seoul National University Freshmen (서울대학교 신입생의 폐결핵 유병률 추이에 대한 연구)

  • Kim, Dong-Wan;Yoo, Chui-Gyu;Lee, Choon-Taek;Kim, Young-When;Hen, Sung-Koo;Yoon, Yong-Bum;Shim, Young-Soo
    • Tuberculosis and Respiratory Diseases
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    • v.45 no.3
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    • pp.495-502
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    • 1998
  • Background: The prevalence of tuberculosis is closely related to socioeconomic status. Although the nation-wide prevalence of pulmonary tuberculosis was constantly decreasing during past 30years, there were few studies about prevalence of specific social groups in Korea. We examined prevalence of pulmonary tuberculosis among university freshmen, which might represent one of the specific social groups in Korea. Methods: The prevalence of radiologically active pulmonary tuberculosis among Seoul National University(SNU) freshmen was investigated from 1988 to 1997. And those results were compared with prevalence data of SNU freshmen from 1977 to 1987 and also with prevalence of age matched general population. Results: There was continuous decrement of prevalence of pulmonary tuBerculosis among university freshmen. In 1985 and 1990, there was significant prevalence difference between university freshmen and general population. But in 1995, the prevalence of both groups was not significantly different. Conclusion: The prevalence of pulmonary tuberculosis in university freshmen has decreased steadily. The prevalence of pulmonary tuberculosis in university freshmen was lower than that of age-matched general population during past 20years. However, this trend was not evident in 1995.

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Design and Implementation of Web-based Problem Management System for CT Radiological Technologist Education (CT 전문방사선사 교육을 위한 웹기반 문항관리 시스템의 설계 및 구현)

  • Shin Yong-Won;Koo Bong-Oh;Shim Choon-Bo
    • The Journal of the Korea Contents Association
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    • v.5 no.1
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    • pp.27-35
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    • 2005
  • Recently, despite of the rapid progress of information technology in the medical and health fields, the development and management of problem sets about medical and education contents related with radiological technologist has been still achieved by manual and offline method using document editor. In this study, the unique web-based problem management system is designed and implemented. That system can efficiently manage and present various kind of problem set about integrated education and personal license without time and space limitations in order to improve the efficiency of supplementary training and to obtain the professional license for CT radiological technologist. The proposed system is composed of administration module and user module. The former supports several functions such as problem creation, problem categorization, user management, and adjustment of leveled assessment. On the other hand, the latter functions examination applying , problem retrieval, personal score retrieval, and interpretation viewing, and so on. In addition, our system is expected as a useful and practical system which provides problem interpretation and analysis of score results after applying for the examination. It can elevate ability of learning and information interchange among them preparing for CT professional radiological technologist licensing examination

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A Study on the Adoption of Cyclotron Decommissioning Plan Criteria by the Analysis of Domestic Relocation and Abroad Dismantling Practices (국내 사이클로트론 이전 및 해외 해체 사례 분석을 통한 해체 계획 기준 도입 연구)

  • Woo, Rina;Kim, Yongmin;Song, Minchul;Cho, Daehyung;Lee, Jaesung;Kim, Wantae
    • Journal of Radiation Protection and Research
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    • v.38 no.2
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    • pp.91-99
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    • 2013
  • There are many reasons for decommissioning of cyclotron such as not only age-related deficiency, any serious wear or damage but also relocation, upgrade and changing mission. Decommission of cyclotron in USA and EU give rise to a lot of low-level radioactive waste and costs. Various research on decommissioning of particle accelerator have been carried to reduce the cost of decommissioning in USA and EU. In USA, the NRC require DFP (Decommissioning Funding Plan) to authorized licenser by 10 CFR Part 30.35. To resolve radioactive waste problem and reduce the estimated cost of cyclotron decommissioning, we should consider technical aspects (decommissioning procedures, decontamination techniques, etc.) and safety aspects(residual radioactivity, the expected dose, etc) for decommissioning. In this study, we analyzed practical information on the decommissioning of cyclotron in ANL (Argonne National Laboratory) and Belgium (EU). And we investigated the experience on the cyclotron relocation from SNUH (Seoul National University Hospital) to SKKU (Sungkyunkwan University). From these results, we provide the basic data for establishing of relevant standards on domestic cyclotron decommissioning. It is necessary to adopt the DFP for safe and economic decommissioning and waste recycling. These result could be utilized for the establishment on the standards and useful requirements.

병원 근로자의 요통에 관한 조사

  • Park, Eun-Ok
    • Korean Journal of Occupational Health Nursing
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    • v.2
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    • pp.60-70
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    • 1992
  • 본 연구는 병원 근로자의 요통의 정도와 관련 요인들을 파악하고자 1992년 12월 1일부터 1993년 1월 23일까지 병원근로자 961명을 대상으로 실시되었다. 조사내용은 요통과 요통의 동반증상, 요통의 관련요인인 인구사회학적 특성, 작업특성에 관한 것으로 인구사회학적 특성에는 성, 연령, 근무기간, 직종 등을 포함하였고, 작업 특성에서는 작업강도, 요부의 긴장 요구정도, 작업의 단순성 및 반복성, 물건이나 환자를 운반하는 정도, 밀기와 끌기의 정도, 증상 발생 시 휴식의 가능성 등과 작업 자세를 포함하였다. 자료수집방법은 본 연구자가 개발한 자가보고식 설문지를 이용하였다. 1. 전체 대상자 961명 중 59.5%가 요통을 호소하였으며, 요통호소자의 동반증상으로는'허리의 뻐큰함'이 78.7%로 가장 많았고, '다리가 저리다'가 59.1%였으며, '허리의 운동 장애'가 23.6%, '다리의 감각이상'이 20.3%인 것으로 나타났다. 2. 인구사회학적 특성에 따른 요통호소율을 비교해 본 결과, 첫째, 성별 요통호소율은 유의한 차이를 보였다(p<.05). 둘째, 요통호소군과 비호소군의 두 집단 간 평균연령에 유의한 차이를 보이지 않았으며, 연령별 호소율을 비교하였을 때, 가장 높은 요통호소율을 보인 집단이 25-29세 연령군으로 65.0%였으며, 가장 낮은 요통호소율을 보인 집단은 30-34 세 군으로 53.9%였다. 세째, 근무기간별 요통호소율을 비교해 보면, 10년 미만의 근무기간을 가진 군은 요통호소율에 별 차이를 보이지 않는데 반해, 10-12년 근무기간 군은 55.3%, 13년 이상의 근무기간 군은 47.9%의 요통호소율을 보이고 있어, 장기 근무자가 오히려 낮은 요통호소율을 나타내었다. 그리고 평균 근무기간의 비교에서 요통호소군이 낮은 근무기간을 보이고 있고, 두 집단 간의 차이는 유의하였다(p<.05). 네째, 직종 별로 요통호소율을 보면, 조리보조원(82.2%), 방사선 기사 (67.1%), 물리 치료사(68.2), 간호사(65.9%) 등의 순이었다. 3. 요통호소군과 비호소군의 작업특성을 비교한 결과, 첫째, 요통호소군이 바호소군에 비하여 본인의 작업이 힘들다고 느끼며, 유의한 차이를 보였다(p<.001). 둘째, 요통호소군이 허리의 긴장상태를 많이 요한다고 생각하였으며, 비호소군과 비교하여 유의한 차이가 있었다(p<.001). 세째, 요통호소군이 작업의 단순성이나 반복성을 더 심하게 느끼고 있었고, 유의한 차이를 나타내었다(p<.01). 네째, 요통호소군이 물건이나 환자를 운반하는 일을 더 많이 하는 것으로 나타났으며, 비호소군과 유의한 차이를 보이고 있었다(p<.001). 다섯째, 요통호소군이 비호소군에 비해 밀거나 끄는 일을 더 많이 하고 있는 것으로 나타났으며, 유의한 차이를 보였다(p<.001). 여섯째, 요통호소군에서 증상발생시 휴식이 더 가능하지 않은 것으로 나타났으며, 비호소군과 유의한 차이를 보였다(p<.001). 허리에 부담을 주는 작업의 특성을 전체적으로 파악하기 위하여 위의 여섯항목에 대해 각각 5점을 주어 전 항목의 점수 총합을, 요통이 있는 군과 요통이 없는 군으로 나누어 비교해 보았을 때, 요통호소군은 30점 만점에 24.34(${\pm}4.01$)이었고, 비호소군은 22.05(${\pm}4.18$)이었으며, 이들 두 집단 간에 유의한 차이가 있는 것으로 나타났다(p<.001). 일곱째, 작업 자세에 따른 비교에서 주로 한 자리에 서서 일을 하는 집단이 71.8%로 가장 높았고, 서서 부서 간이나 한 부서 안을 왔다갔다 하는 군이 다음으로 높고, 앉아서 일을 하는 군이 50.3%로 가장 낮았다.

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병원에서의 산업보건관리

  • Jeon, Gyeong-Ja
    • Korean Journal of Occupational Health Nursing
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    • v.2
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    • pp.40-51
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    • 1992
  • 본 연구는 병원에서의 산업보건관리 실태를 파악하기 위하여 전국에 있는 병원을 대상으로 1992년 12월 1일부터 1993년 1월 23일까지 설문조사를 설시하였다. 설문조사에 응당한 병원은 41개병원으로 회수율은 51.9%였다. 조사에 이용된 설문지는 산업안전보건법 내용을 기초로 하여 본 연구자가 작성한 것이며 안전보전에 관한 제반 규정, 안전보건관리체계, 근로자건강관리, 작업환경관리, 보건교육, 보건관련시설, 질병 및 상해에 대한 보상 등에 관한 45개문항으로 구성되어 있다. 분석결과는 다음과 같다. 첫째, 전체 병원 중 68.3%가 안전보건관리 규정이 있다고 답하였으며, 77.5%의 병원이 단체협약 중 근로자의 안전과 보건에 관한 조항을 포함시키고 있는 것으로 나타났다. 단체협약에 포함된 내용 중에는 정기건강진단(23.7%)과 질병 및 상해에 대한 보상(20.9%), 안전보건위원회의 구성(18.1%)등이 많았다. 둘째, 대상 병원중 66.7%가 안전보건관리책임자, 관리감독자, 안전담당자를 두고 있는 것으로 나타났고, 근로자수가 1,000명 이상인 병원은 83.3%가 이들 인력을 선임하고 있다. 그러나, 보건관리자와 안전관리자를 전담으로 두고 있는 경우는 한 곳도 없었으며 50%이내에서 겸직으로 선임하고 있었다. 또한, 안전보건위원회를 운영하고 있거나 노사협의회로 이를 대치하고 있는 병원은 54.2%로 절반 수준에 머물렀고, 그나마 정기적으로 운영을 하고 있다고 답한 병원은 3개 병원 밖에 되지 않았다. 세째, 근로자 건강관리를 위한 건강진단 실시 현황을 보면, 채용시검진 97.6%, 일반건강진단 100.0%, 특수 건강진단 24.4%가 실시하고 있었다. 건강진단에서 주로 실시하고 있는 항목은 흉부 X선검사, 시력, 혈압, 혈청GOT/GPT, 체중, 신장등이었다. 그러나, 병원에서 감염될 수 있는 기회가 높은 간염항원/항체검사의 실시율은 85.7%로 아직도 실시하지 않는 병원이 있음을 알 수 있다. 네째, 작업환경관리를 위하여 정기적으로 환경측정을 실시하는 병원은 21.6%였고 주로 측정하는 항목은 방사선이었다. 특히 소음, 조명, 분진에 대한 측정이 이루어지지 않음은 근로자뿐아니라 환자의 안위에도부정적인 영향을 미칠 수 있다. 다섯째, 안전한 작업과 근로자의 건강을 위하여 정기적인 보건교육을 설시하고 있는 병원은 불과 5.6%였다. 교육내용은 주로 안전에 관한 것이었다. 여섯째, 근로자의 일상적인 건강문제를 해결해주는 의무실을 독립적으로 마련하고 있는 병원은 한 곳도 없었고, 교대근무자나 당직자를 위한 수면시설은 44.7%, 작업 후에 사용할 수 있는 샤워시설은 35.1%의 병원이 마련하고 있었다. 일곱째, 근무중 다치거나 병에 걸렸을 때 치료비에 대한 부담은 대체로 병원이 하고 있으며 치료기간 중 근무는 병가나 휴직으로 처리되고 있다. 이는 병원이 산재보상보험법에 적용을 받지 않은 사업으로 분류되어 있는 현실에 기인된 것으로 보상과 관련된 부담을 병원이나 근로자 모두가 안게 되는 결과를 초래하게 되는 것이다. 이상에서 볼 때 병원근로자를 위한 산업보건관리는 주로 건강진단과 질병 및 상해에 대한 보상제도가 이루어지고 있는 실정이다. 그러므로 질병의 예방이나 악화방지 나아가 건강증진을 도모하기 위한 지속적인 노력을 기울이고 있는 병원은 전무한 상태임을 알 수 있다. 이러한 현실을 병원근로자를 위한 산업보건관리에 대한 인식이 전반적으로 부족함을 드러내는 것으로 이를 개선하기 위한 보다 적극적인 노력이 시급히 요청되고 있다.

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The Effect of Transarterial Chemoembolization(TAE) on Lung Metastasis of Hepatocellular Carcinoma (간동맥 색전술이 간세포함의 폐 전이에 미치는 영향)

  • Lee, Heon-Ju;Eun, Jong-Ryul;Song, Young-Doo;Park, Chan-Won
    • Journal of Yeungnam Medical Science
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    • v.17 no.1
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    • pp.66-74
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    • 2000
  • Background: During the follow up period after transarterial embolization(TAE), cases of pulmonary metastasis were more prevalent in TAE-treated patients than in TAE-untreated patients. Therefore, a study was conducted to evaluate whether TAE increases the incidence of pulmonary metastasis of hepatocellular carcinoma and to clarify the risk factors for pulmonary metastasis. Methods: From March 1991 to March 1995, 156 patients who had been diagnosed with hepatocellular carcinoma by serology, and radiographic and histologic methods at Yeungnam University hospital were involved in this study. We excluded 12 patients with lung metastasis on initial diagnosis and the others. The remaining 144 patients had been followed up for at least 5 months and, divided into four groups according to lung metastasis and trans-arterial embolization treatment, and evaluated for age, sex, child-pugh score, liver cirrhosis, and level of AFP. Results: Pulmonary metastasis was found in 18.0% (26/144), of which 92.3%(24/26) and 7.7%(2/26) of the patients with and without transarterial chemoembolization, respectively. Of the patients, 23.5% (24/102) with TAE had lung metastais during follow-up periods and 4.7% (2/42) without TAE had lung metastasis. There was more likelihood for lung metastasis after TAE. but there was no difference between two groups in age, sex, child-pugh class, the presence of liver cirrhosis, and AFP. Conclusions: The incidence of pulmonary metastasis of hepatocellular carcinoma after TAE was higher. Child-pugh class was the only related clinical preciptating factors for pulmonary metastasis in TAE in our study. Our results suggest that regular chest X-ray check-ups may be more frequently needed by patients who had TAE treatment for hepatocellular carcinoma.

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