Cone beam형 전산화단층영상의 원리

최용석,김규태,황의환 대한구강악안면방사선학회 2006 Imaging Science in Dentistry Vol.36 No.3

The use of computed tomography for dental procedures has increased recently. Cone beam computed tomography (CBCT) systems have been designed for imaging hard tissues of the dentomaxillofacial region. CBCT is capable of providing high resolution in images of high diagnostic quality. This technology allows for 3-dimensional representation of the dentomaxillofacial skeleton with minimal distortion, but at lower equipment cost, simpler image acquisition and lower patient dose. Because this technology produces images with isotropic sub-millimeter spatial resolution, it is ideally suited for dedicated dentomaxillofacial imaging. In this paper, we provide a brief overview of cone beam scanning technology and compare it with the fan beam scanning used in conventional CT and the basic principles of currently available CBCT systems.

늑막저류에서의 Adenosine Deaminase 동위효소의 진단적 의의

용석중,신계철,한동표,최종환 연세대학교 원주의과대학 1991 원주의대논문집 Vol.4 No.1

충남대학교병원 마취발전의 경향에 관한 분석 : 1967년부터 - 1996년까지 from 1967 to 1996

최세진,김상수,정규돈,윤석화,신용섭,손수창,이원형,김혜자,이정은 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.2

To evaluate the specificity and historical trends of the anesthesia in Chungnam National University Hospital, anesthetic experiences of 83,572 in total performed at Chungnam National University Hospital from January 1967 to December 1996 were analyzed statistically and clinically according to age, sex, surgical department, physical status, elective and emergency surgery, premedicants, IV anesthetics, anesthetic methods, inhalational anesthetics, muscle relaxants. The results were as follows : 1. The number of cases has been steadily increased year by year. 2. The ratio of male to female was 52.8% : 47.2%. 3. According to the age, There were 44,905 cases (54%) in the group of 13-45 years. 4. According to the ASA classification of physical status, most of the cases were belonged to the class 1 & 2 (72.5%). 5. The ratio of elective to emergency was 79.4% to 20.6%. 6. Recently, glycopyrrolate has been used increasingly. 7. Thiopental sodium has been mainly used for intravenous induction agent. 8. General anesthesia has been used mainly. 9. Enflurane is the most common inhalational anesthetic agent. but Isoflurane has been used increasingly. 10. Most of muscle relaxants are Pancuronium & Vecuronium(84.5%).

지속적 외래 복막투석 환자에서 복막염과 출구감염의 임상상 및 위험인자에 관한 임상적 고찰

최영환,김응석,김용섭,이정호 동국대학교 의학연구소 2000 東國醫學 Vol.7 No.-

지속적 외래복막투석(CAPD)은 전세계적으로 말기 신부전 환자에서 널리 시행되고 있는 신대체 요법으로 지속적으로 증가하는 추세이다. 하지만 복막투석에 대한 이해, 수술 기법의 발달, 연결 기구와 도관에 대한 끊임없는 개발에도 불구하고 복막염과 도관 관련 합병증 등은 아직도 중요한 문제로 남아 있으며 복막투석의 실패 원인의 대부분을 차지하고 있으나 복막염과 출구감염의 위험 인자에 대한 보고는 미흡한 실정이다. 이에 저자들은 1994년 4월부터 1998년 12월까지 동국대학교 경주병원 신장내과에서 CAPD를 시행한 말기 신부전증 환자 51명을 대상으로 복막염과 출구감염의 임상상 및 위험인자에 대한 후향적 조사를 시행하였다. 복막염의 발생빈도는 환자당 0.73회/년 이었고 57.3%에서 원인균이 배양되었으며 동정된 균으로는 Staphylococcus aureus(20.4%), Staphylococcus epidemidis(14.9%), Steptococcus species(11.2%) 순 이었고 전체적으로 그람양성 균주가 68%, 복합 균주가 배양된 경우가 17.1% 였다. 복막염의 치료 결과는 항생제로만 치유된 경우가 83.4%, 도관제거 14.8%, 사망 1.8%였고 외래 치료가 44.4%, 입원하여 치료한 경우가 55.6% 였다. 위험인자에 대한 비교에서는 50세 이하환자에서 0.88 회/년, 51세 이상에서 1.21 회/년으로 고령군에서 더 높았으며(p=0.043) 활동성이 있는 군과 없는 군은 각각 0.78회/년, 1.21 회/년으로 활동성이 없는 군에서 더 높았으며(p=0.044) 직업이 없는 군에서 1.12 회/년, 직업이 있는 군에서 0.93 회/년으로 직없이 없는 군에서 발생빈도가 더 높았다(p=0.041). 또한 당뇨군에서는 연평균 1.22 회/년, 비당뇨군에서는 0.99 회/년으로 당뇨군에서 더 발생빈도가 높았고( p=0.039), 출구 감염이 있는 군에서 1.19 회/년,없는 군에서 9.98 회/년으로 출구감염이 있는 군에서 더 발생빈도가 높았다(p=0.047). 그 외 성별, 학력, 거주지, 투석액의 종류 및 도관 종류에서는 통계적 의의가 없었다. 출구감염은 환자당 0.37 회/년의 발생빈도 및 88.6%의 원인균 배양율을 보였으며, 동정된 균으로는 Staphylococcus aureus(34.3%), Staphylococcus epidermidis(17.1%), Sterptococcus species (8.6%) 순 이었고 전체 63개의 도관중 21개(33.3%) 제거되었으며 가장 많은 원인은 복막염 8예(38.1%) 와 출구감염 6예(28.6%)였다. 출구감염에 영향을 주는 인자에 대한 분석에서는 농촌에 거주하는 경우, 당뇨병이 있는 경우, Tenckhoff 카테터를 사용하는 경우에 다소 빈도가 높은 것으로 나타났으나 통계학적 유의성은 없었고 그 외에 나이, 성별, 활동성, 직업의 유무, 학력과도 연관성이 없었다. 이상의 결과로 CAPD 시행 시 환자선정에 있어 나이, 당뇨병 유무, 거주지, 직업 등의 인자를 특히 고려하여 시행해야 할 것으로 생각된다. Objectives : CAPD has established itself as an effective therapeutic modality as hemodialysis or renal transplantation in the treatment of patients with end stage renal disease. Although much progress of technology of CAPD has been made, peritonitis or catheter-related complications are still important problem until now. Therefore, we investigated about risk factors which are related to peritonitis and exit infection in CAPD patients. Methods : We analysed retrospectively the clinical results of 51 patients on CAPD at Dongguk University Kyoung-ju Hospital from April 1994 to December 1998. Results : 1) There were 31 male and 20 female patients who are 28 to 79 age-old(mean age 55.4±11 years). 2) Underlying disorders of CAPD patients were diabetic nephropathy(33.3%), hypertensive nephrosclerosis(27.5%) and glomerulonephritis(17.7%) 3) The incidence of peritonitis was 0.73/year/patient and peritonitis free interval period was 9.3±1.4 months. The isolation rate of microorganisms from patients with peritonitis was 57.3% and the order of frequency of isolated organims was Staphylococcus aureus, Staphylococcus epiermidis, Steptococcus species, Pseudomonas species and Acinetobacter species. The peritonitis was treated with antibiotics only(83.4%), catheter removal(14.8%) and death(1.8%) 4) The incidence of peritonitis was higher in patients with older age(>50yr), DM, exit site infection and without occupation, physical activity according to univariate analysis (p<0.05). 5) The incidence of exit site infection was 0.37/year/patient and the order of frequency of isolated organisms was Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus species, and Pseudomonas species. The statistical analysis for risk factor of exit site infection had no significant value. The exit site infection was treated with antibiotics only(45.7), external cuff externalization(8.6%), external cuff removal(28.6%), and catheter removal(14.8%). 6) 21 of catheters(33.3%) were removed. The peritonitis and exit site infection or tunnel infection were main causes of catheter removal. The catheter survival rate was 82%, 73%, 68% and 50% at one, two, three and four years, respectively. Mean survival time of all catheters was 39.3±1.4 months. 7) The causes of death were most frequently cardiac disease(28.4%), followed by vascular disease(14.4%), malignancy(14.4%) and infections(14.4%). The patient survival rate was 92%, 82%, 78% and 70% at one, two, three and four years, respectively. Mean survival time of all patients was 61.2±1.8 months. Conclusion : Although CAPD is an effective therapeutic modality in the treatment of patients with end stage renal disease, CAPD peritonitis and exit site infection are the most important pitfalls of CAPD. From the above results, we can know that the risk factors significantly affecting the incidence of peritonitis were old age, no occupation, no physical activity, DM, and exit site infection. Therefore, we most consider the risk factors affecting the incidence of peritonitis and exit site infection when we choose the renal replace therapy in end stage renal failure.

다체계의 Isolation-Projection 방법

崔尙惇,趙龍在,申光錫 경북대학교 과학교육연구소 1993 科學敎育硏究誌 Vol.17 No.-

As easy way to utilize the isolation-projection technique in deriving the cyclotron absorption formula is introduced.

스포츠센터 직원들의 인구학적 특성에 따른 직무스트레스 및 직무만족의 차이

최종삼,조용철,장순용,정석진 龍仁大學校 體育科學硏究所 2002 體育科學硏究論叢 Vol.12 No.1

This study purposes the influence of job stress upon job satisfaction of Sports Centers Employees demonstratively. I set up the employees of sports centers in Seoul and Gyeonggi Province as Population and took 300 employees in 13 sports centers using a stratified cluster random sampling. The actually used data were 278 workers except 22 employees who were judged to respond unfaithfully or to leave out some of the surveyed questions. I made a conclusion as follows through statistical analyses including reliability analysis, frequency analysis, t-test, one-way ANOVA and Scheffe's multiple range test. First, there was a statistical significance according to age, education, position, and working years in the job stress under personal characteristics and personalities of employees in sports centers. Second, there was a statistical significance according to age, education, position, and working years in the job satisfaction under personal characteristics and personalities of employees in sports centers.

하악 제3대구치와 하악관과의 위치관계에 대한 파노라마 방사선사진과 cone beam형 전산화단층영상의 비교

최형수,김규태,최용석,황의환 대한구강악안면방사선학회 2008 Imaging Science in Dentistry Vol.38 No.3

Purpose : To assess the diagnostic accuracy and value in an imaging technique field through the comparison of cone beam computed tomography and conventional panoramic radiography in assessing the topographic relationship between the mandibular canal and impacted third molars. Materials and Methods : Participants consisted of 100 patients offered the images through cone beam computed tomography and panoramic radiography. PSR-9000 Dental CT system (Asahi Roentgen Ind. Co., Ltd, Japan) was used as the unit of cone beam computed tomography. CE-II (Asahi Roentgen Ind. Co., Ltd, Japan) and Pro Max (Planmeca Oy, Finland) were used as the unit of panoramic radiography. The images obtained through panoramic radiography were classified into 3 types according to the distance between mandibular canal and root of mandibular third molar. And they were classified into 4 types according to the proximity of radiographic feature. The images obtained through cone beam computed tomography based on the classification above were classified into 4 types according to the location between the mandibular canal and the root and were analyzed. And they were classified into buccal, inferior, lingual, and between roots, according to the location between mandibular canal and root. The data were statistically analyzed and estimated by χ²-test. Results : 1. There was no statistical significance according to 3 types (type l, type ll, type lll) through CBCT. 2. The results of 4 types (type A, type B, type C, type D) through CBCT were as high prevalence of CBCT 1 in type A, CBCT 2 in type B, CBCT 3 in type C, and CBCT1 in type D and those of which showed statistical significance (P value=0.03). 3. The results according to location between mandibular canal and root through CBCT recorded each 49, 25, 17, 9 as buccal, inferior, lingual, between roots. Conclusion : When estimating the mandibular canal and the roots through the panoramic radiography, it could be difficult to drive the views of which this estimation was considerable. Thus it is required to have an accurate diagnostic approaching through CBCT that could estimate the location between mandibular canal and roots.

植物凝集素 Trichosanthes kirilowii와 赤血球에 의한 사람 唾液의 型分類에 關한 硏究

崔碩鏞,黃迪駿 고려대학교 의과대학 1991 고려대 의대 잡지 Vol.28 No.1

In order to classify the human saliva, agglutination inhibition test was performed, using a phytagglutinin, Trichosanthes kirilowii and 268 human saliva specimens. The phytagglutinin, Trichosanthes kirilowii extracts, which were absorbed by the human saliva, reacted upon the human red blood cells as inhibitor or non-inhibitor of hemagglutinin.The newly classified saliva types(inhibitor and non-inhibitor) were compared with the established saliva secretion types, blood groups and serum types statistically. On the other hand, the agglutination inhibition tests were also carried out using the saliva stains in the same methods. The results obtained were summarized as follows : 1. Human saliva could be classified into two groups. One group was inhibited the agg-lutnation activities of trichosanthes kirilowii extract to human red blood cells and the other was not. The frequency of the former was 67% and the latter was 33% among the Investigated 268 human saliva. 2. The new saliva types, inhibitor and non-inhibitor, showed no constant relation with the known saliva types, secretor and non-secretor. 3. The classification and distribution of the saliva types showed no constant relation with those of the other known blood groups and serum types, such as ABO, MN, TKl-D and TKN-D, TKI-T and TKN-T, TKI-M and TKN-M, IPO and NPO and ICO and NCO res-pectively. 4. The classification and distribution of the new saliva types showed some relation with those Htr human blood types. 5. This new classification of human saliva type may be applicable for the classification of human saliva stains.

뇌졸중후 상지부종환자에 대한 경락음압요법 치험 3 예

최정은,김용석,이경섭 경희대학교 2000 慶熙醫學 Vol.16 No.3-4

후방 도달 척추 절제술을 이용한 강직성 요천추 변형의 치료

석세일,정의룡,이정희,김진혁,김성수,이지호,최원기,박용원 대한척추외과학회 2004 대한척추외과학회지 Vol.11 No.2