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Dipyridamole 부하 심근 SPECT에서 Dipyridamole의 작용과 부작용
고창순(Chang Soon Koh),이명철(Myung Chul Lee),정준기(June Key Chung),이동수(Dong Soo Lee),최창운(Chang Woon Choi),배상균(Sang Kyun Bae),양형인(Hyung In Yang),여정석(Jeong Suk Yeo) 대한핵의학회 1993 핵의학 분자영상 Vol.27 No.2
N/A Dipyridamole is an agent that may be used to noninvasively evaluate coronary artery disease. The effect of dipyridamole infusion its generally related to its induced peripheral vasodilatory effect. In normal person, heart rate is generally increased slightly while blood pressure decrease, but the achieved double product and related myocardial oxygen consumption have no significant change. The purpose of this study is to examine the effect and side effect of dipyridamole, and to compare different response to dipyridamole among the patients. We evaluated 847 patients who underwent dipyridamole stress myocardial SPECT. 93.6% of them had induced hypotension 0.9% showed no change of blood pressure, 5.5% had increased blood pressure 8.3% had no change of pulse rate more than 10% of basal pulse rate. Among diabetes, 16.9% was not change of pulse rate, 6.7% in non-diabetes. There was no significant correlation between age and rate pressure product rest(RPPr), in patients without perfusion defects on SPECT(y=7.1x+48.4r=0.13 p>0.01). As increasing age, RPPs/RPPr was declined(y=-11.6x+68.9 r=0.17 p〈0.01), similar results were obtained in patients with perfusion defect. The size of perfusion defect on myocardial SPECT have no correlation between RPPr and RPPs/RPPr. The side effects of dipyridamole included chest pain and chest tightness, headache, abdominal pain, dizzness, nausea, and dyspnea. As increasing age, dipyridamole-induced cardiac work at rest was increased, cardiac response to dipyridamole was decreased.
악성종양에서 골수면역신티그라피를 이용한 골수전이의 평가 : 99mTc-MDP 뼈스캔과의 비교
고창순(Chang Soon Koh),김노경(Noe Kyeong Kim),김병국(Byoung Kook Kim),최창운(Chang Woon Choi),정준기(Jun Key Chung),방영주(Yung Jue Bang),이경한(Kyung Han Lee),정홍근(Hong Keun Chung),이명철(Myoung Chul Lee) 대한핵의학회 1994 핵의학 분자영상 Vol.28 No.1
N/A Although bone scan is a highly sensitive test for detecting bone metastasis, its findings are often limited in specificity and cannot be used for assessing the bone marrow. Bone marrow scintigraphy may provide useful information but previous experience with radiolabelled colloid has been disappointing. Recently, 99mTc labeled anti-granulocyte rnonoclonal antibody (anti-NCA-95 MAb) has been introdueed as a new bone marrow imaging agent. To evaluate the usefulness of 99mTc anti-NCA MAb bone marrow scans for detecting skeietal metastasis, bone marrow scans of 44 malignant tumor patients were evaluated and compared with bone scan fmdings. Bone scan showed abnormal lesions in 26(59%) cases, and 18 of these patients also had an abnormal bone marrow scan. Seven of the 8 patients who had normal bone marrow scan despite bone scan lesions were confirmed to be free from metastasis. There was one case with a marrow defect despite normal bone scan but the presence of metastasis was not determined due to loss of follow up. Bone scan demonstrated a total of 64 lesions while bone marrow scan showed 38 lesions. Fifty percent (32/64) of the bone scan lesions had matching marrow defects while the rernaining 50% did not. Most of these non matched lesions were suggested to be nonspecific 1esions such as rib fractures or degenerative change. Meanwhile bone marrow scan was able to detect 6 new lesions not detected by bone scan, but metastasis in each lesion was not confirmed. Bone marrow scan was also helpful in assessing equivocal bone scan lesions to be of metastatic nature in 10 patients by demonstrating a matched marrow defect. Thus 99mTc anti-NCA MAb bone marrow scan can help exclude metastasis in patients with nonspecific bone scan lesions and may be able to detect metastatic lesions not seen with bone scan. It appears useful as a complementary study to bone scan in evaluating malignant tumor patients.
주사용(走査用) $^{113m}In$ 교질(膠質)의 조제(調製) 및 흰쥐에서의 장기분포(臟器分布)에 관(關)한 연구(硏究)
고창순,이종헌,장고창,홍창기,Koh, Chang-Soon,Rhee, Chong-Heon,Chang, Ko-Chang,Hong, Chang-Gi D. 대한핵의학회 1969 핵의학 분자영상 Vol.3 No.1
The newly developed diagnostic method with application of $^{113}Sn-^{113m}In$ cow system ($^{113}Sn:\;T\frac{1}{2}$ 118 days, $^{113m}In:\;T\frac{1}{2}$ 1.7 hrs, 390 Kev, Single ${\gamma}$) has the remarkable advantages such as increased diagnostic ability by single large dose administration of $^{113m}In$ with no subsequent radiation hazard and shortened examining time. We reformed the research of following scope with the use of developed $^{113}Sn-^{113m}In$ cow (25 mCi) generator: The sizes of particles produced under various conditions were investigated, and possibility for application to the scannings of various organs such as brain, liver, lung, bone marrow and blood pool etc. were studied. Results: $^{113m}InCl_3$ solution eluted from diluted HCl solution (pH 1.5) passed through $^{113}Sn-^{113m}In$ generator, and there can be produced various sized particles of colloidal indium. And there observed the state of distribution of $^{113m}In$ in each organ which showed many differences according to the particle sizes of colloidal indium. The results are stated as follows: 1. The adjustment of pH is the most important factor in making the desirable particle size of colloidal indium. The colloid for blood pool showed the highest level as 7.1%/gm blood, at pH 1.7, the colloid of pH 3.5 for liver scanning showed the highest level, 88.4%, in the liver, the colloid pH 6 showed the highest level, 3.1%, in the spleen, and the colloid of pH 11.0 showed the highest level, 85.3%/gm, in the lung. 2. The colloid for liver scanning made with NaCl-NaOH system showed the highest liver uptake at pH 7.2, and at either higher or lower pH than 7.2 showed decrease of liver uptake more or less. 3. The activity of $^{113m}In$ eluted through $^{113}Sn-^{113m}In$ generator indicated over 90% in the initial 4 ml, and particularly 88.1%-86.0% in the initial 2 ml. 4. The incubation time, tempertaure and mechanical irritation related to colloid formation and coating of colloid were not the definite condition of influence.
악성종양에서 골수면역신티그라피를 이용한 골수전이의 평가 : $^{99m}Tc$-MDP 뼈스캔과의 비교
이경한,최창운,방영주,정준기,정홍근,이명철,김병국,김노경,고창순,Lee, Kyung-Han,Choi, Chang-Woon,Bang, Yung-Jue,Chung, Jun-Key,Chung, Hong-Keun,Lee, Myoung-Chul,Kim, Byoung-Kook,Kim, Noe-Kyeong,Koh, Chang-Soon 대한핵의학회 1994 핵의학 분자영상 Vol.28 No.1
Although bone scan is a highly sensitive test for detecting bone metastasis, its findings are often limited in specificity and cannot be used for assessing the bone marrow. Bone marrow scintigraphy may provide useful information but previous experience with radiolabelled colloid has been disappointing. Recently, $^{99m}Tc$ labeled anti-granulocyte monoclonal antibody (anti-NCA-95 MAb) has been introduced as a new bone marrow imaging agent. To evaluate the usefulness of $^{99m}Tc$ anti-NCA MAb bone marrow scans for detecting skeletal metastasis, bone marrow scans of 44 malignant tumor patients were evaluated and compared with bone scan findings. Bone scan showed abnormal lesions in 26(59%) cases, and 18 of these patients also had an abnormal bone marrow scan. Seven of the 8 patients who had normal bone marrow scan despite bone scan lesions were confirmed to be free from metastasis. There was one case with a marrow defect despite normal bone scan but the presence of metastasis was not determined due to loss of follow up. Bone scan demonstrated a total of 64 lesions while bone marrow scan showed 38 lesions. Fifty percent (32/64) of the bone scan lesions had matching marrow defects while the remaining 50% did not. Most of these non matched lesions were suggested to be nonspecific lesions such as rib fractures or degenerative change. Meanwhile bone marrow scan was able to detect 6 new lesions not detected by bone scan, bit metastasis in each lesion was not confirmed. Bone marrow scan was also helpful in assessing equivocal bone scan lesions to be of metastatic nature in 10 patients by demonstrating a matched marrow defect. Thus $^{99m}Tc$ anti-NCA MAb bone marrow scan can help exclude metastasis in patients with nonspecific bone scan lesions and may be able to detect metastatic lesions not seen with bone scan. It appears useful as a complementary study to bone scan in evaluating malignant tumor patients.
국산 항 CEA 항체의 I - 131 , Tc - 99m 표지법 확립 및 면역학적 특성 분석
고창순(Chang Soon Koh),이명철(Myung Chul Lee),정준기(June Key Chung),이동수(Dong Soo Lee),홍미경(Mee Kyoung Hong),최석례(Seok Rye Choi),서일택(Il Taek Seo),정홍근(Hong Keun Chung),정준호(Jun Ho Chung) 대한핵의학회 1992 핵의학 분자영상 Vol.26 No.2
N/A Caneer cells have several tumor-associated antigens on the cell surfaces, and antibodies against these antigens have been developed by many investigators. Radiolabeled antibodies have been used as new methods to diagnose and treat malignant tumors. Especially anti- carcinoembryonic antigen (CEA) is the most popular antibody for these purposes. In this investigation, we tried to label 131I and Tc-99m to anti-CEA monoclonal antibodies which were developed in the Seoul National University College of Medicine. We found CEA-79 and CEA-92 antibodies had the better immunological characteristics among 8 anti-CEA monoclonal antibodies. And radioiodination of CEA-79 could be performed by chloramine-T method, while radioiodination of CEA-92 by iodogen method. To label these antibodies with Tc-99m, we used pretargeting transchelation as direct labeling method. At first, Tc-99m was bound to glucaric acid, and monoclonal antibody was reduced by β-mercaptoethanol. When these were incubated together, Tc -99m bound to glucarate was switched to monoclonal antibody because of higher affinity. We established conditions of several steps in this method. Anti-CEA monoclonal antibodies labeled with 131I and Tc-99m are expected to be used valuably in the detection and treatment of malignant tumors.
Technegas 환기스캔과 99mTc - DTPA Aerosol스캔의 비교
고창순(Chang Soon Koh),이명철(Myung Chul Lee),정준기(June Key Chung),이동수(Dong Soo Lee),김상은(Sang Eun Kim),궁성수(Sung Soo Koong),최윤호(Yoon Ho Choi),김건열(Keun Youl Kim) 대한핵의학회 1990 핵의학 분자영상 Vol.24 No.2
N/A Pulmonary embolism demands rapid and accurate diagnosis. And ventilation imaging has greatly improved the diagnostic accuracy of pulmonary embolism in addition to perfusion imaging. Agents currently used include xenon-133, krypton-8lm and technetium-99m radioaerosols. However radioactive gases are compromised by availability and cost for krypton-8lm, radiation dose, gamma energy and non-physiologic behaviour for xenon-133. Radioaerosols of technetium-99m componds are rapidly cleared from the lung after inhalation, and their relative low effeciency (specific radioactivity) and wide distribution of particle sizes make them also suboptimum. A new ventilation agent, Technegas is a suspension of structured graphite ellipsoids with diameter below 20nm, labelled with Tc-99m in a carrier gas of Argon. This report describes the authors' clinical experience with Technegas. This is the first reported clinical study of this agent in Korea. A comparison of Technegas and Tc-99m-DTPA aerosol was performed in 12 patients with various pulmonary diseases such as COPD, pulmonary tuberculosis and pleural effusion. All patients were studied with Tc-99m-DTPA aerosol inhalation and Technegas ventilation. In both studies image quality was assessed (1) semiquantitatively by scoring bronchial and gastric activity, (2) subjectivly by direct visual comparisan of peripheral lung images and (3) quantitatively by computing the peripheral penetration index(PI) for each lungs. The bronchial activites were seen in 7 out of 12 cases with Tc-99m-DTPA aerosol and in 5/12 with Technegas. The gastric activities were seen in 5/12 and 1/12 cases respectively. The average values of PI were 61.26% with Tc- 99m-DTPA aerosol and 69.20% with Technegas (p〉0.05). Using Tc-99m-DTPA aerosol, COPD patients showed deposition in the central airways with poor visualization of the peripheral areas of the lungs. In Technegas studies these phenomena were less prominent, and the examination is well tolerated by patient and requires only a minimum of patient cooperation. With superiority of easy availability and handling, better physical characteristics and favorable image quality, Technegas is a promising agent for lung ventilation scanning.
신피질성 간질에서 발작기 99mTc - HMPAO 뇌혈류 SPECT의 간질병소 국소화 성능
고창순(Chang Soon Koh),이명철(Myung Chul Lee),정준기(June Key Chung),이동수(Dong Soo Lee),김은실(Eun Sil Kim),현인영(In Young Hyun),장기현(Kee Hyun Chang),이상건(Sang Kun Lee) 대한핵의학회 1995 핵의학 분자영상 Vol.29 No.4
N/A The epileptogenic zones should be localized precisely before surgical resection of these zones in intractable epilepsy. The localization is more difficult in patients with neocortical epilepsy than in patients with temporal lobe epilepsy. This study aimed at evaluation of the usefulness of ictal brain perfusion SPECT for the localization of epileptogenic zones in neocortical epilepsy. We compared the performance of ictal SPECT with MRI referring to ictal scalp electroencephalography (sEEG). Ictal Tc-99m-HMPAO SPECT were done in twenty-one patients. Ictal EEG were also obtained during video monitoring. MRI were reviewd. According to the ictal sEEG and semiology, 8 patients were frontal lobe epilepsy, 7 patients were lateral temporal lobe epilepsy, 2 patients were parietal lobe epilepsy, and 4 patients were occipital lobe epilepsy. Ictal SPECT showed hyperperfusion in 14 patients(67%) in the zones which were suspected to be epileptogenic according to ictal EEG and semiology. MRI found morphologic abnormalities in 9 patients(43%). Among the 12 patients, in whom no epileptogenic zones were revealed by MR1, ictal SPECT found zones of hyperperfusion concordant with ictal sEEG in 9 patients(75%). However, no zones of hyperperfusion were found in 4 among 9 patients who were found to have cerebromalacia, abnormal calcification and migration anomaly in MRI. We thought that ictal SPECT was useful for localization of epileptogenic zones in neocortical epilepsy and especially in patients with negative findings in MRI.
Miniaturized Chromatography에 의한 99mTc - 표지 방사성의약품의 정도 관리
고창순(Chang Soon Koh),이명철(Myung Chul Lee),정준기(June Key Chung),정재민(Jae Min Jeong),염미경(Mi Kyoung Yeom),진광호(Kwang Ho Jin),조규진(Kyu Jin Cho) 대한핵의학회 1990 핵의학 분자영상 Vol.24 No.1
N/A The general use of a number of Tc-99m-labelled compounds makes the need for good routine quality control procedures, especially the labelling efficiency measurements. The purpose of these study were to measure the labelling efficiency of Tc-99m-labelled MDP, DTPA, Tin colloid, and Antimony sulfide colloid using miniaturized paper and instant thin layer chromatography. The chromatographic systems include whatman 3 MM paper and acetone, Gelman ITLC-SG and 0.9% sodium chloride. The chromatographic strips are miniaturized (1×10 cm), marked and numbered. Labelling efficiencies of Tc-99m-labelled DTPA and Tin colloid were above 98.0%. Tc-99m- labelled Antimony sulfide colloid was 90.0%. And labelling efficiency of Tc-99m-labelled MDP was 89.0% Coefficient variance of Tc-99m-labelled MDP, DTPA, Tin colloid, and Antimony sulfide colloid were 5.14%, 2.06%, 1.82% and 4.90%, respectively. We found that this miniaturized chromatographic quality control was simple and reliable.