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

만성기침 환자에서 천명의 경험 유무에 따른 기침이형천식 진단율의 차이

이병재,민태훈,최동철 대한천식 및 알레르기학회 2004 천식 및 알레르기 Vol.24 No.1

Backgrond : Objective tests including the methacholine bronchial provocation test and the induced sputum examination are now crucial in the detection of causes of chronic cough. On the other hand, carefully taken history of characteristics, complications, or duration of cough are known not useful in diagnosing causes of chronic cough. Objectives : Patients with a history of cough lasting more than 3 weeks were enrolled. Patients who were current smokers, who had been receiving an angiotensin-converting enxyme inhibitor, who had basal EFV3 less than 70% of predicted value, who had adventitial sound on auscultation, or who had experienced resting dyspnea were all excluded. We divided the patients into two groups according to the ever wheeze history. The methacholine test (reference value of PC20 = 25㎎/㎖) and the induced sputum eosinophil percentile (reference value = 3%) were compared between the two groups. All patients were evaluated by an anatomic diagnostic protocol, and the prevalence of cough variant asthma was compared. Results : Three hundred eighty-two patients (138 males and 244 females) with mean age of 48.2 years met the inclusion criteria. The mean duration of cough was 30.4 months (range, 3 weeks to 600 months). Ever wheezers were 154 (40.3%), and non-wheezers were 228 (59.7%). Ever wheeze group showed higher positive methacholine test (37.7% vs. 14.5%, p<0.001) and increased sputum eosinophils (43.5% vs. 11.4%, F<.001) compared to non-wheeze group. The prevalence of cough variant asthma was significantly higher in ever wheeze group (33.8% vs. 6.1%, F<.001), and that of eosinophilic bronchitis showed similar result (13.6% vs. 4.8%. F<.01). The positive predictive value of the methacholine test was lower in non-wheeze group compared to ever wheeze group (42.4% vs. 86.2%, F<.01). Conclusion : Ever wheeze history might be very important in suspecting, cough variant asthma as a cause of chronic cough. In chronic cough patients without ever wheeze, prevalence of cough variant asthma and positive predictive value of methacholine test were low. (J Asthma Allergy Clin Immunol 24 : 94-102, 2004)

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.

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.

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.

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.

수용성 조영제를 사용한 척추조영술에 관한 방사선학적 연구

이병철 충남대학교 의과대학 지역사회의학연구소 1985 충남의대잡지 Vol.12 No.2

The myelographies with water soluble non-ionic contrast media Amipaque were done on 60 patients at CNUH, January 1985 to October 1985 and the results were as follows. 1. There were 60 patients, 37 were males and 23 were females. 2. Adverse reactions during and after myelography were mild and transitory. 3. The Amipaque was convenient time saving and excellent water soluble contrast media of myelogram and the delineability of lesions was more excellent than pantopaque and suitable followed by intrathecal meterizamide spine CT. 4. The price is rather expensive.

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

유방종괴의 방사선학적 연구

이병철 충남대학교 의과대학 지역사회의학연구소 1995 충남의대잡지 Vol.22 No.1

Mammography is the oldest and the most popular method in the diagnosis of brest mass and received the special attention as the powerful instrument in early detection of breast cancer. In Korea, nowadays, increasing incidence of breast cancer and good prognosis after early detection and proper treatment need the clinical application of mammography for management of patient with breast disease and for the detection of occult cancer. The materials consist of 267 case of mammography performed at Chungnam university hospital, since January, 1994 to March, 1995. We analyzed the diagnostic accuracy of mammography and mammo-graphic findings in clinically and pathologically confirmed 243 cases. The conclusions are as follows : 1. Mammography is very useful not only in diagnosis of breast mass and early detection of cancer, but also in management of patients with breast symptom and sign. 2. The most common complaint of the patient is palpable mass(81.3%) and next is pain(8.6%). 3. Mammographic findings was correlated with pathologic findings, mammographic diagnosis correct in 71.6% of carcinoma and 28.4% of benign disease.

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.