한국 소아에 있어서 장골계수에 관한 방사선학적 연구

이병철 충남대학교 의과대학 지역사회의학연구소 1983 충남의대잡지 Vol.10 No.2

Abnormal pelvic configuration with resultant abnormal value of acetabular angle, iliac angle and iliac index is well known in some congenital and hereditary diseases and its measurement is valuable in establishing diagnosis in these diseases. Considering that there is little available standard values of Korean children, we measured acetabular angles, iliac angles and iliac indices in 115 Korean children. The results are as follows: 1. The values of acetabular angle, iliac angle and iliac index are significantly lower than those of American children. 2. The values of acetabular angle, iliac angle and iliac index are same range as other Korean data. 3. The values of acetabular angel, iliac angle and iliac index between male and female are not different.

요추 전산화 단층촬영의 방사선학적 분석

이병철,김충현 충남대학교 의과대학 지역사회의학연구소 1990 충남의대잡지 Vol.17 No.2

Authors retrospectively analysed 80 cases of lumbar CT during the period from January 1990 to June 1990 at Chungnam National University Hospital. Lumbar CT scan revealed high-positive findings(93%). CT findings were classified into disc bulging(35%), spinal stenosis(28%), disc protrusion(24%), fracture & dislocation(6%), inflammatory disorders(4%), and tumor(3%) in order. High-resolution CT have the advantage of visualization of the vetebral bodies & their posterior elements which are difficult to investigate because of their complex bony anatomy, assessment of size & configuration of the spinal canal, evaluation of the paravertebral soft tissue, and utilization of multiplanar reconstruction, especially in spinal trauma, in the axial plane. Authors consider high-resolution CT is very valuable diagnostic tool to detect disease processes involving the spine, localize precisely structural lesion involving the spine & paravetebral soft tissues, and provide significant information regarding the nature of the abnormality.

복부 전산화 단층촬영의 방사선학적 분석

이병철 충남대학교 의과대학 지역사회의학연구소 1991 충남의대잡지 Vol.18 No.2

Author retrospectively analysed 540 cases of abdominal CT during the period from January 1991 to October 1991 at Chungnam National University Hospital. Abdominal CT scan revealed 88% positive rate. CT findings were classified into hepatobiliary disorders(13%), gastro-intestinal disorders(26%), retroperitoneal disorders(31%), pancreatic disorders(11%), intraperitoneal, disorders(9%), splenic disorders(7% ), and pelvic disorders(3%) in order. CT has advantages in permitting the rapid and precise localization of any lesion in the body, characterizing the nature of lesion, and assessing the relationship to adjacent structures and the extent of lesion in detail. Author thinks CT is a highly valuable diagnostic method of deciding the treatment plan, such as surgical resectability and evaluating the prognosis of various intra-adbominal disease.

불현성 신결핵의 초음파 소견

李秉喆 충남대학교 의과대학 지역사회의학연구소 1987 충남의대잡지 Vol.14 No.2

Ultrasonogram is an especially simple and helpful diagnostic tool, and noninvasive method in kidneys. It is also useful for evaluation of the renal structural changes. In the non-visualized kidneys on IVP, it gives us more informations about the abnormalities of the structure than other methods. Author analyzed the ultrasonograms of 12 cases of non-visualized renal tuberculosis which were conformed at the CNUH from Jan. '86 to Oct, '87. The results as follows: 1. Among the 12 cases, 4 cases were male and 8 cases of female, The age distribution was from 17 to 66years, and 67% were over the age of 40. 2. The kidneys were increased in size (78%) and lobulated in shape (67%). 3. Hydronephrotic changes were 50% (6 cases) and show irregular thickened heterogenous echotextures and the parenchyme were decreased. 4. The calyceopelves were dilated and variable sized, and margins were irregular.

복합레진 인레이 수복시 와도형태에 따른 치아파절에 관한 유한요소법적 연구

민병순,김철순 大韓齒科保存學會 1994 Restorative Dentistry & Endodontics Vol.19 No.1

멀티미디어 데이터베이스에서의 질의처리를 위한 필터링 방법 연구

임해철,김병곤,한정운 弘益大學校 科學技術硏究所 2000 科學技術硏究論文集 Vol.11 No.-

With the prevalence of multimedia data such as images content-based retrieval of data is becoming increasingly important. To handle multimedia data, multi-dimensional indexing methods such as the R-tree, R*-tree, TV-tree, MVP-tree and Pyramid-technique have been proposed. Numerous research results on how to effectively manipulate these structures have been presented during the last decade. Query processing strategies, which is important for reducing the processing time, is one such area of research. Much of the research on query processing of multimedia data have focused on two aspects, namely, range query and k-nearest-neighbor query (k-NNQ). This paper proposes algorithms for range query processing for R-tree based structures. The novel aspect of these algorithms is that they make use of the notion of VP filtering, a concept borrowed from the MVP-tree. By so doing, we attain considerable performance benefits while paying insignificant overhead during the construction of the index structure. Also, we retain the dynamic feature of R-tree based structures. In the remainder of this section, we briefly review the basics of relevant tree structures. Based on these discussions, we present the motivation behind the introduction of the notion of VP filtering. Despite success of proxy cache in the internet, proxy cache is not efficient for multimedia stream such as video and audio. In this paper, we propose a new proxy cache policy and a efficient cache replacement algorithm for multimedia stream. We expect that a new proxy cache policy is efficient for multimedia stream.

다차원 데이터의 인덱싱을 위한 데이터 변환 기법 및 구조에 관한 연구

김병곤,임해철 弘益大學校 科學技術硏究所 1999 科學技術硏究論文集 Vol.10 No.1

Multi-dimensional data indexing techniques such as the R-tree, R*-tree, TV-tree, and MVP-tree have been introduced, and research regarding techniques for query processing based on these indexing techniques in real-life environments have been active. To express multi-dimensional data into indexing structures, transformation technique is needed and, for this transformed data, special indexing structure is needed. In this paper, we introduce transformation technique and indexing structure for multi-dimensional data, especially for skewed data.

서울 강서지역 1개 대학병원에서 성인 급성 신우신염의 원인균과 항생제 감수성

황병연,이재갑,박대원,이연주,김성범,엄중식,손장욱,정희진,김우주,김민자,박승철 대한감염학회 2003 감염과 화학요법 Vol.35 No.5

목적 : 3년간 서울시 강서지역의 1개 대학병원에서 입원치료를 받은 성인 급성 신우신염 환자를 대상으로 원인균과 항생제 감수성을 조사하고, 향후 급성 신우신염의 초기 경험적 치료 항생제를 제안하고자 하였다. 방법 : 1999년 1월부터 2001년 12월까지 3년간 고려대학교 의과대학 구로병원에 상부요로감염으로 내원한 16세 이상 환자 229명의 의무 기록을 검토를 통하여, 인구학적 특성, 원인균, 항생제 감수성, 초기 항생제 사용 양상과 입원기간을 조사하였다. 결과 : 연구에 포함된 229명을 118명의 단순 신우신염군과 111명의 복잡 신우신염군으로 구분 하였다. 단수 신우신염의 평균 발생 연령은 38.2세와 복잡 신우신염 56.1세로 복잡 신우신염 환자의 연령이 유의하게 높았다(P<0.001). 양군 모두에서 원인균 중 E. coli의 분리율이 가장 높았으며 항생제 감수성 결과 ampicillin, trimethoprim-sulfame-thoxazole에는 높은 내성률을 보였고, ciprofloxacin, gentamicin, cefotaxime에 대한 감수성은 비교적 높았으나 복잡 신우신염의 경우 단순 신우신염에 비하여 ciprofloxacin, gentamicin에 대한 감수성이 다소 낮은 것을 확인할 수 있었다. 평균 입원 기간, 항생제 투여 기간에 있어서도 복잡 신우신염군에서 유의하게 길었다. 결과 : 본 연구의 결과 서울의 강서 지역에서 대학병원급에 치료 의뢰되는 단순 급성 신우신염의 치료에 있어 1차 항생제로 3세대 cephalosporin, aminoglycoside, quinolone 중 한가지를 초기 경험적 치료제로 사용을 고려하여야 할 것으로 사료된다. Background : The purpose of this study is to recommend the initial therapeutic regimen for adult patients with acute pyelonephritis (APN) according to the changes of antimicrobial susceptibility patterns of causative microorganisms isolated from patients with APN. Methods : We reviewed medical charts of 229 APN patients, who had been treated at Korea University Guro Hospital from 1st of January. 1999 to 31st of December, 2001. We investigated the demographic data, clinical findings, durations of hospital treatment, antimicrobial susceptibility patterns of the causative microorganisms and initial antibiotic regimens in patients with APN. Results : In this study, 229 adult patients with APN were classified into simple APN patients (118 patients, 51.5%) and complicated APN patients (111 patients, 48.4%). Mean age of patients with simple APN was 38.2±14.1 years old and that of patients with complicated APN was 56.1±14.9 years old. Mean age of patients with complicated APN was significantly higher than that of simple APN patients (P<0.0001). Escherichia coli was the most common microorganism both in simple APN (96.7%) group and in complicated APN (90.6%) group. Antimicrobial susceptibility of E. coli was at the low level of ampicillin (31%/20%) and trimethoprim-sulfamethoxazole (42.6%/34.2%) in each group. In contrast, ciprofloxacin (11.5%/22.7%), gentamicin (16.4%/22%) and cefotaxime (0%/8.2%) resistance remained at relatively lower level. In comparison of simple APN with complicated APN, ciprofloxacin and gentamicin resistances were higher in complicted APN group. Average duration of hospitalization (5.9±2.3 days/8.2±4.6 days) and duration of antibiotic use (12.1±3.9 days/15.3±10.0 days) were significantly longer in complicated APN. Conclusions: The results of this study suggests that 3rd cephalosporin, aminoglycoside or quinolone antibiotic would considered as one of the initial therapeutic regimen for patients with simple APN in southwestern Seoul.

유방질환에 대한 방사선학적 연구

이병철,김형열 충남대학교 의과대학 지역사회의학연구소 1992 충남의대잡지 Vol.19 No.2

There are variable imaging modalities in detection and diagnosis of the breast disease, such as mammography, xeroradiography, ultrasonography, computed tomography, and magnetic resonsnce image. Among of them, mammography is most widely and easily used imaging modality, and have diagnostic values in screening and follow up study of the breast disease. The authors performed mammography in 249 patients with breast abnormalities who had visited to CNUH from Jan. 1992 to Nov., and we analyzed major symptoms of patients, mammographic findings, diagnostic accuracy in pathologically confirmed 113 cases, to know the usefulness of the mammography. 1. Age distribution of the patient is variable from 10th to 5th decade and the average is 38.9. 2. The most common complaint of the patient is palpable mass(59.4%) and the next is pain(22.1%). 3. The pathognomonic mammographic findings of the malignant breast disease is irregular marginated mass shadow with dystrophic calcification and occupies 26.5% of total cases, and the benign mass occupies 14.6%, and the other is fibrocystic disease(18.5%) which does not show the mass shadow. 4. Mmmographic findings was correlated with pathologic findings, and mammographic diagnosis was correct in 90.9% of carcinoma and 65.7% of benign disease. In conclusion, mammography is one of the most valuable imaging modalities which is not only widely and easily used but also provide the important information in screening and early detection of the breast disease.

한국인 頭蓋底의 諸般 正常計測値에 관한 放射線學的 硏究

이병철,조준식 충남대학교 의과대학 지역사회의학연구소 1984 충남의대잡지 Vol.11 No.2

Determination of several normal values were carried out in healthy 200 cases of Korean adults, 108 cases of male and 92 cases of females, by the drawing and calculation on skull roentgenograms, In many instances, the change of normal values provides an important clinical values and often is decisive to evaluate the diagnosis, treatment and prognosis of skull diseases. The values are as follows, 1. To determine basilar invagination; A. Chamberlain's line; the distance of odontoid process B. McRae's line; realation with the position of odontoid process C. Method of Bull; The angle B in Fig. 3 is more than 13, the position of the odontoid process is abnormal D. McGregor's line; the distance of odontoid process 2. Basal angle to determine platybasia. 3. In sella turcica; A. Depth B. A-P diameter C. Traseverse diameter D. Volume The results are as follows; 1. Chamberlain's line; the distance between this line and upper margin of odontoid process (mean) male 1. 02cm, female 0.67em, total 0. 91cm below the line 2. McRae's line; In all cases, the position of dontoid process located below this line 3. Method of Bull; (mean) male 7.34°female 8.18°total 7.61° 4. McGregor's line; the distance between this line and upper margin of odontid process; (mean) male 3.5mm, female 2.2mm, total 3.1mm below this line 2. Basal angle; (mean) male 131.32°female 132.26°total 131.62° 3. In sella turcica; (mean) A. Depth; male 1.17cm, female 0.96cm, total O.94cm B. A-P diameter; 1.31cm, female 1.25cm, total 1.29cm C. Transverse diameter; male 2.04cm, female 2.08cm, total 2.07 cm D. Volume; V=0.36×A×B×C male 1126mm^3, female 899mm^3, total 904mm^3