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원발성 간암의 67Ga Scan 소견 ; 혈관조영술 소견과의 비교
유형식(Hyung Sik Yoo),이종태(Jong Tae Lee),박창윤(Chang Yun Park),서정호(Jung Ho Suh),김명준(Myung Joon Kim) 대한핵의학회 1989 핵의학 분자영상 Vol.23 No.1
N/A The relationship between angiographic findings and those of 67Ga scan was evaluated in 30 patients with primary hepatocellular carcinoma diagnosed by either pathological examination or laboratory, radiologic findings. Twenty-three cases revealed hot activities on 67Ga scan and definite tumor stains on angiography. Main findings of 67Ga scans of 7 cases were isoactivity in 5 and cold area in 2, 5 of which revealed faint or no tumor stain on angiography. Cold areas within the primary hepatocellular carcinoma were noted in 9 cases by 67Ga scan. In 6 cases these were due to tumor necrosis. Remaining 3 cases had arterioportal shunt, portal vein thrombosis and one had necrosis as well. These results indicate that gallium uptake of primary hepatocelluar carcinoma seems to be relatively correlated with tumor stains on angiography. It is well known that the necrotic portion of primary hepatocellular carcinoma does not uptake gallium and it's the main cause of cold areas on 67Ga scan. And we suspect that the hemodynamic changes of primary hepatocellular carcinoma such as 1arge arterioportal shunt, portal vein thromosis may cause the decreased activity on 67Ga scan.
유형식 ( Hyung Sik Yoo ) 연세대학교 의과대학 의사학과 의학사연구소 2011 연세의사학 Vol.14 No.1
The purpose of this study was aimed to explore the scientific activities of the Severance Union Medical College(SUMC) during the Japanese colonial period (1910-1945). It is well known that western medicine was introduced by Dr. H. N. Allen since 1885, and expanded by Dr. O. R. Avison at the beginning of the 20th century. In Nov. 14th, 1914, there search department of SUMC had started as a stone laying in the field of medical research by the missionary doctors. And thereafter, the academic activities of SUMC had been extended through the case conferences, and research meetings of each department until 1945. The activities from SUMC physicians were published in the medical journals named China Medical Journal, Chosun Medical Journal, Mansen no Ikai, The Journal of SUMC, Korean Medical Journal(Chosun Euibo), etc. The lists of the articles published in those journals were analysed periodically following the name of the authors as well as the each basic and clinical department.
자궁경부재발암 환자의 국소동맥 주입식 동위원소 검사 - 방사성 동위원소의 치료시도를 위한 평가 -
유형식(Hyung Sik Yoo),이종태(Jong Tae Lee),박창윤(Chang Yun Park),김은영(Eun Young Kim),서진석(Jin Suck Suh) 대한핵의학회 1990 핵의학 분자영상 Vol.24 No.2
N/A We performed 17 intraarterial scintigraphies in six patients with recurrent cervix cancer. With Seldinger method, the agent (four different radiopharmaceuticals) was perfused at the same speed of infusion of anticancer drugs (25 cc/hour) through internal iliac artery. There were four different radiopharmaceuticals; I-131-Lipiodol, Tc (Technetium)-99m-HSA (Human Serum Albumin), Tc- 99m-Sucralfate and Tc-99m-MAA (Macroaggraegated Albumin). We evaluate the distribution pattern of radioactivity by the use of ratio of Tumor/Extratumor uptake (T/ET ratio). Our results reveals that Tc-99m-MAA scan showed the highest T/ET ratio and the other were not ideal agents for intraarterial therapy of recurrent cervix cancer. In conclusion, an ideal radioisotope and tracer which can block capillary, for example MAA, should be re-evaluated or produced in order to treat the patient with recurrent cervix cancer.
갈색세포종이 의심되는 환자의 평가에 있어서 131I - MIBG Scan의 역할
유형식(Hyung Sik Yoo),박창윤(Chang Yun Park),오세정(Sei Jung Oh),이소진(So Jin Lee) 대한핵의학회 1992 핵의학 분자영상 Vol.26 No.2
N/A Pheochromocytomas are catecholamine producing tumors of neuroectodermal origin. Diagnosis of pheochromocytoma is significant due to potentially curable hypertension. But they have a significant associated morbidity due to uncontrolled hypertension and mortality since 10% are malignant. From Aug. 1989 to Jul. 1992, 12 patients of our institution had 131I-MIBG scan during work up of suspected primary or recurrent pheochromocytoma. In our studies conclude that 131I-MIBG scan is recommended as the initial localizing study of choice (especially for the detection of extraadrenal disease and postoperative recurrence) as a guide for CT and/or MR and specific functional confirmation of their findings.
신유섭 ( Yoo Sub Shin ),신재의 ( Jae Eui Shin ),유형식 ( Hyung Sik Yoo ) 연세대학교 의과대학 의사학과 의학사연구소 2014 연세의사학 Vol.17 No.1
The purpose of this study is to explore the medical enlightenment and academic activities of Dr. Yong-Sul Lee who graduated from the Severance Union Medical College in 1919. Dr. Lee was medically trained in both China and the United States, and by 1926 had developed advanced concepts about the prevention of disease, as well as about its treatment. Christian Messenger between 1927 and 1929, about his experience as a Christianity doctor working with various infectious diseases, and also surgical, pediatric and obstetric diseases. The main purpose of his articles was directed towards the medical enlightenment of the Korean people. He especially emphasized the prevention of diseases by maintaining hygiene, and he described the treatments for various diseases, and warned against the harmfulness of certain traditional medicines. His academic activities were published in those newspapers, magazines and medical journals that were concerned with infectious and orthopedic diseases. He reported on his method of treatment for amoebic abscess of the liver at the Pan Asia-Pacific Surgical Conference in 1929. He was a member of the Korean Medical Society established in 1930, and was involved in the first orthopedic surgery in Korea.
이병희,유형식,이종두,정진일,박창윤,이종태,Lee, Byung-Hee,Yoo, Hyung-Sik,Lee, Jong-Doo,Chung, Jin-Ill,Park, Chang-Yun,Lee, Jong-Tae The Korea Society of Nuclear Medicine 1994 핵의학 분자영상 Vol.28 No.1
This study was aimed to compare the density of the functional microcirculation of hepatocellular carcinoma (HCC) with normal liver and to investigate the effect of hepatic-arterial oily chemoembolization (HAE) by radionuclide examination. Methods : Eight patients with HCC proven by biopsy in five, and clinically and radiologically in three were included. The mixture of 2 cc normal saline with three to four mCi of $^{99m}Tc$-MAA was infused through a hepatic-arterial catheter for a minute. Dynamic images were obtained at a rate of 4 sec per frame for a minute, and static images and SPECT were followed. Results : In three patients who underwent hepatic arterial angiography (HAA) alone, radioactivity was markedly increased in tumors compared to the adjacent liver immediately after infusion of $^{99m}Tc$-MAA. The ratios of tumoral and extratumoral up-take (T/E ratio) were above 6.5 (range; $6.5{\sim}l9$, mean; 12.5). In four of the five patients who under-went superselective HAE, T/E ratio were remark-ably decreased ($0.5{\sim}1.3$). The areas of embolization were better delineated in radionuclide study than in postembolization HAA. In the other one who was considered to be embolized completely on HAA, strong radiouptake in the tumor was disclosed (T/E ratio; 7.0). Conclusions : Therefore hepatic-arterial flow study with radionuclide imaging using $^{99m}Tc$-MAA can be a valuable method to assess the accurate embolization effect in HCC. 본 저자들은 $^{99m}Tc$-MAA를 이용하여 정상 간조직에 대한 간암의 상대적인 미세 혈류량을 조사하고 간암 환자에서 간동맥 색전술을 시행 후 상대적인 혈류량의 변화를 검사함으로써 간동맥 색전술의 효과를 알아보고자 하였다. 여덟명의 간암 환자들을 대상으로 하였는데, 이 중 다섯 명은 조직 생검으로, 그리고 나머지 세 명은 임상적, 그리고 방사선학적으로 진단되었다. 3내지 4mCi의 $^{99m}Tc$-MAA를 2cc의 생리식염수에 혼합하여 간동맥내에 위치된 카테터(catheter)를 통하여 1분간에 걸쳐 서서히 주입한 후 바로 동적영상을 4초 간격으로 1분 동안 얻었으며, 이어서 정적 영상과 SPECT를 시행하였다. 간동맥 혈관 조영술만을 시행한 세명의 환자에서 $^{99m}Tc$-MAA를 주입하자마자 주변 간 조직에서 비해 간암내에 강한 방사능 섭취를 보였으며, 주변 간조직에 대한 간암의 방사능 섭취율은 6.5 이상이었고, 그 범위는 6.5에서 19였으며 평균은 12.5였다. 간동맥 색전술을 시행한 5명 중 4명에서 주변 간조직에 대한 간암의 방사능 섭취율이 심하게 감소하였다($0.5{\sim}1.3$). 또한 색전된 부위는 색전술 후 시행한 추적 간동맥 혈관 촬영상에서 보다 동위원소 검사에서 잘 관찰되었다. 간동맥혈관 촬영상에서 완전히 색전된 것으로 생각된 한 환자에서 동위원소 검사상 간암에 강한 방사능 섭취를 보였다(주변 간조직에 대한 간암의 방사능 섭취율 7.0). 따라서 본 저자들은 $^{99m}Tc$-MAA를 이용한 간 동맥 혈류 검사는 간암에서 색전술의 효과를 정확히 평가할 수 있는 유용한 검사법으로 이용될 수 있으리라 생각한다.
영상진단을 이용한 담석의 성분예측에 관한 연구 - 초음파, 전산화단층촬영 및 자기공명영상을 중심으로 -
박승우(Seung Woo Park),송시영(Si Young Song),강진경(Jin Kyung Kang),유형식(Hyung Sik Yoo),정재복(Jae Bock Chung),박인서(In Suh Park),이은섭(Eun Sub Lee) 대한소화기학회 1995 대한소화기학회지 Vol.27 No.2
N/A Background/Aims: To predict the gallstone composition for nonsurgical treatment, various imaging techniques have been used. One such technique that several researchers have recently showed interest in magnetic resonance imaging(MRI). However, the usefulness of this technique has yet to be studied. Thus, the purpose of this study is to compare the effectiveness of ultrasonography(LJS), computed tomography(CT), and MRI for the prediction of gallstone composition. Methods: Thirty- nine cases of gallstones removed surgically were used. The findings of each imaging studies in vitro were compared with the type of stone classified according to the cholesterol content measured by infrared spectrophotometry. Results: Infrared spectrophotometry showed that seventeen cases were cholesterol, 8 mixed, and 14 pigment stones. When US findings were classified into shooting star, crescent, half-moon, full-moon and star-dust pattern, a single pattern was noted in l9 cases, and two or three patterns were noted in the remaining 20 cases. There was no correlation between the US patterns and gallstone types. CT findings were classified into dense(7 cases), faint(4 cases), hypodense(4 cases), rimmed(lO cases) and laminated(4 cases) patterns. Higher incidence of cholestero1 stones was found in hypodense(4/4) and rimmed(6/lO) patterns, while the occurrence of pigment stones was higher in the dense(l 1/l7) pattern. In MRI, while Tl-weighted images showed visibly incrcased signal in 34 of the 39 cases, 17 cases were signal void on T2-weighted images. There was no correlation between signa1 intensity and cholesterol or calcium content. MRI findings were categorized into dark(5 cases), faint(l case), bright(2 cases), rimmed(7 cases), laminated(13 cases) and central sunburst(l3 cases) patterns. There was higher incidence of Cholesterol stones in the central sunburst pattern(lO/l l), while pigment stones occurred more in rimmed(5/7), laminated(6/l3), and bright(2/2) patterns. The sensitivity, specificity, positive and negative predictive value for the prediction of cholesterol stone were 58.8%, 8l.8%, 71.4% and 72.0% by CT, and 64.7/o, 95.5%, 9I.7% and 77.8% by MRI, respectively. Conclusions: US has no value in predicting the composition of gallstones, while CT and MRI seem to have some predictive power. However, MRI has higher specificity and negative predictive value than CT, and therefore MRI is expected to have more clinical usefulness. (Korean J Gastroenterol 1995;27: 213 - 227)