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김지열(Ji Yeul Kim),범희승(Hee Seung Bom),박주형(Joo Hyung Park),안영근(Young Keun Ahn),정명호(Myung Ho Jeong),조정관(Jeong Gwan Cho),박종춘(Jong Choon Park),강정채(Jung Chaee Kang) 대한핵의학회 1992 핵의학 분자영상 Vol.26 No.2
N/A Clinical role of Tc-99m-MIBI myocardial scintigraphy in the diagnosis of coronary artery disease (CAD) is now well accepted, however, the role of it in the identification of viable myocardium in patients with chronic CAD has not yet been clarified. To determine the usefulness of rest-injected Tc-99m-MIBI scan as a marker of myocardial viability, the regional uptake of this agent at rest was compared with that of 201T1 on reinjection and 24 hours after reinjection images. Subject patients were 13 chronic CAD patients who showed irreversible perfusion defect(s) on standard pharmacologic (dipyridamole) stress-redistribution images. Immediately after the redistribution images were obtained, 37 MBq thallium was injected at rest, and images were reacquired at 10 minutes and 24 hours after reinjection. After then 740 MBq Tc-99m-MIBI was injected, and 1 hour later rest MIBI myocardial imaging was performed. Five sets of images (stress, redistribution, reinjection, delayed images of thallium, and rest image of MIBI) were then analyzed qualitatively and quantitatively. Left ventricle was arbitrarily divided into 9 segments (apex, basal and apical portions of anterior, septal, inferior, and lateral walls). Seven patients and 30 regions showed a fixed perfusion defect on the stress-redistribution images. Among 30 regions, 15 showed positive uptakes and 6 showed negative uptakes on both 201T1 reinjection/delayed images and Tc-99m-MIBI rest images. Five regions showed only thallium uptake and were regarded as viable clinically. Of four regions which showed only Tc-99m-MIBI uptake, two were regarded as viable, while the other two were regarded as a nonviable scar tissue clinically. In conclusion, 201T1 reinjection technique was more reliable in the identification of viable myocardium. However, the role of Tc-99m-MIBI in identification of viable myocardium was still remained to be clarified because 2 of 9 regions showed only Tc-99m-MIBI uptake and were regarded as viable tissues.
마우스에서 경구투여한 방사성스트론튬의 제거에 대한 경구투여 카이토산과 알긴산의 효과
김지열(Ji Yeul Kim),범희승(Hee Seung Bom),최근희(Keun Hee Choi),김희경(Hee Kyung Kim),김광윤(Kwang Yoon Kim) 대한핵의학회 1993 핵의학 분자영상 Vol.27 No.1
N/A Radiostrontium is one of fallouts. It can be absorbed through intestine and causing radiation injury to bones. The purpose of this study is to evaluate the inhibitory effect of 10% chitosan (water soluble and insoluble) and 10% alginate (water soluble and insoluble) on radiostrontium adsorption. Water soluble and insoluble chitosans and alginates were given to 10 NIH male mice in each group for 7 days. At the 7th day, 74 MBq of 85Sr were given through orogastric tube. Chitosans and alginates were given for additional 7 days. During the 7 days, radioactivities of feces were counted daily. Finally animals were sacrificed, and radioactivities of bones were counted. Feca1 excretion was significantly higher in chitosan and alginate group as compared to control from the lst day (p〈0.01). Water soluble chitosan group showed highest fecal excretion. Bony retention was significantly lower in the treated group than the control (p〈0.01). There was no difference among treated groups. In conclusion, both water soluble and insoluble chitosans and alginates were effective agents on lowering orally ingested radiostrontium (85Sr)
디피리다몰 심근관류 SPECT 를 이용한 관동맥질환 진단에 있어 남녀간의 진단율 비교
김지열(Ji Yeul Kim),범희승(Hee Seung Bom),민정준(Jung Jun Min),송호천(Ho Cheon Song),정환정(Hwan Jeong Jeong) 대한핵의학회 1998 핵의학 분자영상 Vol.32 No.2
N/A Purpose: Myocardial SPECT is an effective test for detecting coronary artery disease in the general population. But the diagnostic accuracy between sexes is not defined. The purpose of this study is to compare the diagnostic accuracy between males and females. Materials and Methods: One hundred and seventy seven male and 98 female patients who underwent myocardial SPECT within 1 month of coronary angiography were studied. Myocardial SPECTs were considered abnormal if fixed or reversible perfusion defects were detected. Stenosis severity of ≥ 50% luminal diameter reduction of any artery defined coronary artery disease (CAD). Results: Overall sensitivity for detection of CAD was 98% in men and 97% in women (p=not significant). However, specificities, accuracies, and positive predictive values (PPV) in men and women were 49% vs 31% (p〈0.05), 81% vs 57% (p〈0.01), 78% vs 48% (P〈0.01), respectively Diagnostic accuracies for detection of right coronary artery disease were not different in both sexes, however, accuracies for detection of left anterior descending artery disease and left circumflex artery disease were significantly lower in female (p〈0.05). Conclusion: A significant difference of diagnostic accuracy between sexes, especially in LAD and LCx disease, was noted. Artifacts from breast attenuation might be a cause for the lower diagnostic accuracy in female.
부하 - 휴식과 휴식 - 부하 1일 심근관류영상법의 관동맥질환 진단율 비교
김지열(Ji Yeul Kim),범희승(Hee Seung Bom),민정준(Jung Jun Min),송호천(Ho Cheon Song) 대한핵의학회 1997 핵의학 분자영상 Vol.31 No.1
N/A It has been shown that both rest and stress myocardial perfusion imagings with technetium agents can be performed on the same day using two different doses injected within few hours. The purpose of this study was to compare the two protocols (stress-rest and rest-stress) in detecting coronary artery diseases. One hundred and sixty patients (101 males, 59 females, mean age 57±9 years) and 120 patients (79 males, 41 females, mean age 59±10 years) underwent stress-rest myocardial perfusion SPECT and rest-stress myocardial perfusion SPECT, respectively All of them underwent both myocardial perfusion SPECT and coronary angiography within 1 month. A coronary stenosis was considered significant when it compromised the luminal diameter by≥50%. The chi square test was used to compare differences in sensitivity, specificity and accuracy between the two groups. The overall sensitivity, specificity and accuracy of stress-rest protocol were 99%, 35%and 68%, respectively. Those of rest-stress protocol were 96%, 47%, and 78%, respectively. There was no difference between the two protocols in identifying individual diseased coronary artery branches. Therefore, one day stress-rest and rest-stress myocardial SPECT using Tc-99m agents were comparable and were very sensitive tests in detecting coronary artery diseases.
인체말초혈액 림프구와 마우스골수세포에서 중기염색체 분석법과 미소핵검사법을 이용한 방사선적응반응 평가
김지열(Ji Yeul Kim),범희승(Hee Seung Bom),민정준(Jung Jun Min),송호천(Ho Cheon Song),최근희(Keun Hee Choi),정환정(Hwan Jeong Jeong),이승연(Seung Yeon Lee) 대한핵의학회 1998 핵의학 분자영상 Vol.32 No.6
N/A Purpose: Radiation adaptive response in human peripheral lymphocytes and mouse bone marrow cells was investigated using both metaphase analysis and micronucleus assay. We assessed the correlation between both tests. Materials and Methods: Two groups of the human peripheral lymphocytes and mouse bone marrow cells were exposed to low dose (conditioning dose, 0.18 Gy) or high dose (challenging dose, 2 Gy) γ-rays. The other 4 groups were exposed to low dose followed by high dose after several time intervals (4, 7, 12, and 24 hours, respectively). The frequencies of chromosomal aberrations in metphase analysis and micronuclei in micronucleus assay were counted. Results: Chromosomal aberrations and micronuclei of preexposed group were lower than those of the group only exposed to high dose radiation. Maximal reduction in frequencies of chromosomal aberrations were observed in the group to which challenging dose was given at 7 hour after a conditioning dose (p<0.001). Metaphase analysis and micronucleus assay revealed very good correlation in both human lymphocytes and mouse bone marrow cells (r=0.98, p<0.001; r=0.99, p=0.001, respectively). Conclusion: Radiation adaptive response could be induced by low dose irradiation in both human lymphocytes and mouse bone marrow cells. There was a significant correlation between metaphase analysis and micronucleus assay
김지열(Ji Yeul Kim),범희승(Hee Seung Bom),민정준(Jung Jun Min),송호천(Ho Cheon Song) 대한핵의학회 1997 핵의학 분자영상 Vol.31 No.1
N/A Myocardial scintigraphy is a widely used noninvasive procedure with high sensitivity for the detection of patients with suspected coronary artery disease. The purpose of this study was to determine the prognostic value of a normal myocardial scintigraphy in 292 patients (150 males, 142 females, mean age 53±12 years) with chest pain who were followed from 7 to 58 (mean 25) months. Myocardial SPECT was performed with Tc-99m MIBI in 173 patients, with Tc-99m tetrofosmin in 74 patients and with T1-201 in 45 patients. During the follow-up period, there were 2 cardiac deaths and 2 nonfatal myocardial infarctions resulting in cardiac event rate of 1.37% (0.66% per year). The cardiac event rate was not different in patients with angiographically normal coronary arteries (1/30, 3.3%) and in those who had significant coronary a disease (2/27, 7.4%) (p=0.60). In conclusion, patients with chest pain and normal myocardial scintigraphy have a low cardiac event rate, and there was no significant difference of cardiac event rates between patients with normal and abnormal coronary angiograms.
갑상선암 환자에서 방사성옥소 ( 131I ) 치료로 인한 림프구의 자매염색분체교환 ( SCE ) 빈도 증가
김지열(Ji Yeul Kim),범희승(Hee Seung Bom),최근희(Keun Hee Choi),김광윤(Kwang Yoon Kim),윤정한(Jung Han Yoon),제갈영종(Young Jong Jae Gal),김재민(Jae Min Kim) 대한핵의학회 1993 핵의학 분자영상 Vol.27 No.1
N/A To evaluate the genotoxic effect of 131I, lymphocytes from 9 patients who underwent large dose (150 mCi) 131I therapy after total thyroidectomy were studied for sister chromatid exchanges (SCE) before and after their first radioiodine treatments. Frequency of SCE (FSCE) was counted in chromosomes of 30 lymphocytes in each patients, and was expressed as numbers of SCE per cell. Numbers of leukocytes were also observed during 131I therapy. Pretreatment FSCE (4.2±0.7) was not different from the control (3.8±0.4, p=0.17). However, the frequency was significantly elevated after 131I administration (at the second day, 7.9±0.8, p〈0.001) and was diminished but still significantly elevated after a week (at 9th day, 6.4±0.6, p〈0.001). While counts of leukocytes in the peripheral blood showed no change(p〉0.05). In conclusion, chromatids of human lymphocytes were significantly damaged after 131I treatment without any bone marrow supression. And the repair of SCE was not complete within one week.
마우스복강내 투여한 방사성스토론튬의 체외배설 촉진제로서 카이토산의 효과에 관한 연구
김지열(Ji Yeul Kim),범희승(Hee Seung Bom),김희경(Hee Kyung Kim),김광윤(Kwang Yoon Kim) 대한핵의학회 1993 핵의학 분자영상 Vol.27 No.2
N/A Chitoean is a natural chelating agent. It is derived from chitin which is a cellulose-like biopolymer distributed widely in nature, expecially in shellfish, insects, fungi, and yeast. The purpose of the present study is to investigate whether orally given water soluble chitosan can eliminate intraperitaneally injected radiostrontium (Sr-85) in mice, Water soluble chitoaan and usual food was mixed as 10:90 by weight. The mixed food were fed for 60 (group 1) or 90 days 4poup 2). No chitosan was given to the control group. Each group consiets of 5 miee. Sr-85 (0.2 uCi) was intraperitoneally injected after completion of prefeeding of usual or mixed food. The same food was given for more 5 days. The aniraals were sacrificed at the 6th day. Isolated apmee, s, femurs, tibias, teeth, and tails were eounted by a gamms caunter. The retention of Sr-85 in bones was signifi*cantly lowere in the prefeeding groups (p<G.01). It was lowest in the 90 day prefeeding group. Therefore, prefeeding of water-soluble chitosan was effective on the removal of intraperitoneally injeeted radiostrontium.
각종 소화기암에서 교질성 방사성 린 (燐) 을 이용한 전이성 간암의 방사선 내부치료 - 제1보 : 대장 - 직장암에서 교질성 린을 이용한 간전이의 예방 -
김지열(Ji Yeul Kim),범희승(Hee Seung Bom),최원(Won Choi),김영진(Young Jin Kim) 대한핵의학회 1990 핵의학 분자영상 Vol.24 No.2
N/A Metastases to the liver presents a common clinical problem in the management of patients with colo-rectal cancer, and are responsible for a high degree of morbidity and mortality associated with this malignancy. Unfortunately, attempts at preventing the development of liver metastases in high risk patients has so far been unsuccessful. Ongoing studies of adjuvant chemotherapy have not yet illustrated a significant increase in survival in patients receiving such therapy. The purpose of the study is to investigate the value of adjuvant radiotherapy given in the form of colloidal chromic phosphate P-32 suspension administered via portal vein after radical resection of the primary cancer, in preventing the growth of occult metastases in the liver. Twenty one patients (10 patients of treated group with 11 controls) were followed 18 months after operation. There was no significant change in the CBC and liver functions after administration of P-32 labeled colloidal chromic phosphate. The number of patients who showed local metastases at 18 months were 2 in the treated group and 3 in the control group. While liver metastases occurred in one patient at 6 months and in three at 12 months in the control group, there was no development of liver metastases by 12 months in the treated group. At 18 month follow-up CT scan one patient in the treated group showed a single nodule in the liver. In conclusion liver metastasis rate was lower in the patients who received colloidal P-32 chromic phosphate via portal vein after radical resection of the primary cole-rectal cancer