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이승덕,권기운,고달권,김법민,Lee, Seung-Duk,Kwon, Ki-Won,Koh, Dal-Kwon,Kim, Beop-Min 대한의용생체공학회 2008 의공학회지 Vol.29 No.2
NIRS (Near-infrared Spectroscopy) and DOI (Diffuse Optical Imaging) are relatively new, non-invasive, and non-ionizing methods that measure or image optical properties (Scattering and Absorption Coefficient) and physiological properties (Water Fraction, concentration of Oxy-, Deoxy-Hemoglobin, Cytochrome Oxidase, etc) of biological tissues. In this paper, three different types of NIRS systems, mathematical modeling, and reconstruction algorithms are described. Also, recent applications such as functional brain imaging, optical mammography, NIRS based BMI (Brain-Machine Interface), and small animal study are reviewed.
대장암 절제술 후 정맥 혈전색전증 발생에 대한 저분자량 헤파린의 예방 효과 연구
이승덕(Seung Duk Lee),박지원(Ji Won Park),박성찬(Sung Chan Park),김학진(Hak Jin Kim),최효성(Hyo Seong Choi),오재환(Jae Hwan Oh) 대한외과학회 2010 Annals of Surgical Treatment and Research(ASRT) Vol.79 No.4
Purpose: In western society, prophylaxis for venous thromboembolism (VTE) is the standard treatment under colorectal surgery for colorectal cancer. However, the incidence of VTE after colorectal surgery and the effect of prophylactic methods are not well known in Korea. The aim of this study is to evaluate the incidence of VTE and assess the efficacy and safety of low molecular weight heparin (enoxaparin) after major colorectal surgery in Korean patients with compression stockings. Methods: From Jan. 2006 to Dec. 2008, 1,727 consecutive patients underwent major colorectal surgery. Thirty-six were excluded due to the therapeutic use of enoxaparin. A final number of 1,691 patients were included. Graduated compression stockings were used in all patients and 654 were perioperatively given enoxaparin. Only compression stocking group (group A) and compression stocking with enoxaparin group (group B) were compared in terms of VTE. The event of VTE within 6 months after surgery was counted by clinical symptoms, then imaging findings were used for confirmation. Results: Total VTE developed in 10 patients (0.6%). Three with deep vein thrombosis had pulmonary embolism. Two had only pulmonary embolism. The rates of VTE were not different between group A and B (0.8% vs. 0.3%, P=0.333). Also, postoperative major bleeding was not significantly different. However, postoperative transfusion was higher in group B (P<0.001). Conclusion: The incidence of VTE was very low after colorectal surgery in Korean patients with compression stockings. The additional use of enoxaparin for colorectal cancer patients with compression stockings seems to have little benefit for VTE prophylaxis.
주파수 영역 확산광 단층촬영 장치를 이용한 광 팬텀 및 인체조직의 광 계수 측정
호동수,권기운,엄기윤,이승덕,김법민,Ho, Dong-Su,Kwon, Ki-Woon,Eom, Gi-Yun,Lee, Seung-Duk,Kim, Beop-Min 대한의용생체공학회 2007 의공학회지 Vol.28 No.2
Diffuse optical tomography (DOT) is a relatively new medical imaging modality which uses near infrared light to image large-sized tissues noninvasively. We constructed a frequency-domain DOT system to measure the optical properties of optical phantoms and human tissues. The FD-DOT uses the intensity-modulated infrared light source that illuminates the biological tissues. The phase shift and modulation changes at each detector site are separately processed to measure the optical properties. The absorption and scattering coefficients are separately estimated using inverse algorithms.
장재영 ( Jae Young Jang ),이준성 ( June Sung Lee ),김형준 ( Hyung-joon Kim ),심재준 ( Jae-Jun Shim ),김지훈 ( Ji Hoon Kim ),김보현 ( Bo hyun Kim ),권준혁 ( Choon Hyuck Kwon ),이승덕 ( Seung Duk Lee ),이해원 ( Hae Won Lee ),김정훈 대한간암학회 2017 대한간암학회지 Vol.17 No.1
The General Rules for the Study of Primary Liver Cancer was published in June 2001 as the first edition. Since then, the 5th edition of the General Rules for the Study of Primary Liver Cancer was published by the 17th Committee of the Korean Liver Cancer Association based on the most recent data. The 5th edition of the General Rules for the Study of Primary Liver Cancer ranged over numerous topics such as anatomy, medical assessment of the patients, staging of hepatocellular carcinoma, description of the image findings, summary of hepatic resection, description of the surgical specimens, liver transplantation, reporting the pathological findings, pathological examinations of liver specimen, non-surgical treatment, radiotherapy, and assessment of tumor response after non-surgical treatment of hepatocellular carcinoma. The 5th General Rules for the Study of Primary Liver Cancer will not only become the basis of academic development for liver cancer studies in Korea, but also serve as the primary form of national liver cancer data accumulation based on standardized rules. (J Liver Cancer 2017;17:19-44)