건강검진 수검자를 대상으로 한 단순흉부촬영과 저 선량 나선형 CT와의 비교 분석

최진영,강화원,이강우,이우식,Choi Jin Yeong,Kang Hwa Won,Lee Kang Woo,Lee Woo Sik 대한방사선사협회 2002 대한방사선사협회지 Vol.28 No.1

Purpose : The purpose of this study is to evaluate the usefulness, after we compare and analyze the difference about the location of a lesion and the result of diagnosis on chest radiographs(CR) and low dose computed tomography(LDCT) in subjects for healt

16 MDCT를 이용한 CT Urography의 유용성

김동수(Dong Soo Kim),강화원(Hwa Won Kang),임상묵(Sang Muk Im),구양수(Yang Su Ku),이강우(Kang Woo Lee),최창한(Chang Han Choi) 대한CT영상기술학회 2005 대한CT영상기술학회지 Vol.7 No.1

Purpose To evaluate the usefulness of computed tomography urography with 16-channel multidetecter computed tomography in patients with urinary track disease. Materials and Methods IN 28 patients who underwent CT urography from May 2004 to December 2004. The clinical symptoms of these patients include; renal donors or hematuria, which were clinically suggestive of urinary system disorders. All studies were performed on a siemens sensation 16 scanner with 16mm detectors. CT scans were obtained on a unenhanced, arterial phase, 1,3,5 minites with the following technique : a collimator of 5mm a pitch of 1, and 3d reconstrutions at a thickness of 2mm with intervals of l.5mm. Intravenous administered of the normal saline 50 ml immediately after injecting contrast medium(at a rate of 3 ml/sec). Results Of these 28 patients,(9men and 19 women, age ranged from 20 to 79 years old, mean age 44.8 years)l4 patients(46.7%) were proven to have no 뮤normal disease, 4 patients(13.4%) were with renal stones or hydronephrosis, and there were 10 patients(40.9%) of other urinary system disorders. Conclusion CT urography is a very useful modality to evaluate kidny-transeplatation donors, hematuria and flank pain in the patients with urinary track disease

고해상능 전산화단층촬영을 이용한 폐기종 정량분석의 유용성 : 폐기능 검사와의 비교

임상묵(Sang Muk Im),이우식(Woo Sik Lee),구양수(Yang Su Goo),이강우(Kang Woo Lee),조영기(Young Ki Cho),강화원(Hwa Won Kang),최창한(Chang Han Choi),이광원(Kwang Won Lee),김동수(Dong Su Kim) 대한전산화단층기술학회 2006 대한CT영상기술학회지 Vol.8 No.1

Purpose The pathological severity of emphysema can be detected in high resolution CT well. We obtained mean lung density at inspiratory and expiratory, and percentage of emphysema subrange per slice through Quantitative emphysema CT. We tried to know the usability of Quantitative analysis in emphysema CT, the correlation between results of Quantitative emphysema CT and results of pulmonary function test such as forced vital capacity and forced expiratory volume in one second. Materials and Methods For this study, we selected 10 emphysema patients who had been found to have emphysema through high resolution CT and pulmonary function test during the period from june to august 2005, and who did not have accompanying diseases except emphysema. Also we selected 10 normal persons as a control group who did not have any history clinical disease or smoking in the past. In high resolution CT, we scanned the whole lungs on full inspiration and full expiration at slice thickness of 1mm and at intervals of 10mm using Somatom Sensation 16 with exposure conditions of 140kVp, 160mAs and algorithm B70 ultra sharp. In addition, we measured the area of emphysema by summing values obtained from each section through measuring the CT value inside the parenchyma of the lungs using a Quantitative CT software program. And calculated mean lung density and subrange percentage in the control group and the emphysema patient group on full inspiration and full expiration at pulmonary function test, and determined significance among them. Moreover, we compared forced vital capacity, which was an index of pulmonary function test for the emphysema patients, and forced expiratory capacity in one second for the emphysema patient group and analyzed significant differences using SPSS 10.0. Results Mean lung density of the emphysema patient group on full inspiration and that on full expiration were 895.59HU and 861.45HU, respectively, and their subrange percentages were 63% and 50%, respectively. Statistically significant differences were observed between the control group and the emphysema group in mean lung density and subrange percentage on full inspiration and full expiration. According to the result of analyzing the correlation of mean lung density and subrange percentage in the emphysema patient groups with the indexes of pulmonary function test such as forced vital capacity and forced expiratory volume in one second, statistically significant differences were observed in one second forced expiratory volume according to subrange percentage on full expiration. This suggests that quantative CT is a useful test for diagnosing emphysema and it is more effective to examine emphysema patients on full expiration. Conclusion According to the results of quantitative CT on the control group and the emphysema group, significant differences were observed between the groups in pulmonary function test, so the emphysema quantitative CT program appeared useful in analyzing emphysema but it is considered necessary to develop a pulmonary function quantitative CT that can examine patients with maintaining their breathing in a constant state.

전산화 단층촬영에 사용되는 조영제의 부작용 발생에 대한 분석

임상묵(Sang Muk Lim),조영기(Young Ki Cho),구양수(Yang Soo Gu),이강우(Kang Woo Lee),송환수(Hwan Soo Song),강화원(Hwa Won Kang),김영빈(Young Bin Kim),임성훈(Sung Hoon Lim),온상구(Sang Gu On) 대한CT영상기술학회 2008 대한CT영상기술학회지 Vol.10 No.1

Purpose The objective of this article is to analyze the symptom of patients suffering the adverse reaction of contrast medium in CT test and the risk factor mat can cause adverse reaction in order to provide basic materials which contribute to find the method to reduce adverse reaction in advance. Materials and Methods Among the patients visiting university hospital from January to July, 2007, adults over 16 years old to whom contrast medium was applied into vein for CT test were chosen. Then, among them, 92 male and female patients who suffered the adverse reaction of contrast medium were selected as target. Analyzing backwardly the general property of testee recorded in the written consent for test which was received from patients or custodian before CT test and the former history of the adverse reaction of contrast medium, existence/unexistence of disease and the disease, the test result of patients (hypertension, allergy, asthma, medication adverse reaction, kidney disease, diabetes, digestive organ, respiratory organ, circulatory organ, nerve, hematogenesis, lymph, thyroid gland and other unidentified disease), the authors investigated the relation with adverse reaction and analyzed the risk factor of adverse reaction as per tested part, types of contrast, infusion quantity, infusion velocity in accordance with contrast medium applied to the testee. Further, the symptom of adverse reaction was analyzed in each type. Namely, actual number and percentage was analyzed in the division of dermal sensory system, respiratory organ, digestive organ, nerve system, circulatory organ, ophthalmologic system and so on. To analyze the risk factor of adverse reaction of testee after CT test, Chi-square test and simple/multiple regression analysis was adopted to diverse variables so as to analyze significance by using SPSS 10.0 statistical program. Results 1. In the general property, the division of sex was 36 men(39.1%) and 56 women (60.9%), showing no significant difference in the analysis of sex on the symptom of adverse reaction(p=0.132). In the aspect of age, those in 50~59 years old showed the highest rate of adverse reaction -29 persons (31.5%) and those under 19 years old showed the lowest rate of adverse reaction -1 person (1.1%). Thus, the age analysis in the symptom of adverse reaction also showed no statistically significant difference(p=0.204). The occurrence of adverse reaction in each part of body for test also showed no significant difference from the symptom of adverse reaction of contrast medium (p=0.137). 2. In the case of type of contrast medium (p=0.093), infusion quantity (p=0.279), infusion velocity (p=0.314), there was no statistically significant difference from the symptom of adverse re-action of contrast medium. In the product of A-1,54 persons (58.7%), 61 persons (66.3%) in 121-130cc, 37 persons (40.2%) in 2.6-3.0cc/sec, respectively showing the highest distribution, namely, the symptom of adverse reaction. In the former history of the contrast medium, 10 out of 92 persons(10.9%) were analyzed, thereby showing statistically significant difference(p=0.003). 3. In the analysis of adverse reaction of contrast medium as per history of disease, 9 patients(11%) of hypertension showed urticaria and itching, ex 7), 16 patients (19.5%) of allergic asthma showed urticaria and itching, ex 17) and flush, ex 5), 4 patients of medication adverse reaction (5.2%) showed flush, dermal edema, dizziness, ex 3), 3 patients(3.9%) of kidney disease showed urticaria and itching, ex 5), 32 patients(41.6%) of digestive organ disease, the highest distribution showed itching and urticaria, ex 30), flush, ex 11), 1 patient(1.3%) of nerve system disease showed urticaria and itching, dizziness, ex 2), 6 patients(7.8%) of thyroid gland disease showed urticaria and itching, ex 6), dyspnea, ex 2). Thus, the symptom of adverse reaction of contrast medium as per history of disease showed statistically significant difference(p=