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수정 HT을 이용한 중첩된 곡선성분 검출 : 타원 및 원의 검출 Detection of Ellipse and Circle
위승정,최광미,정종필,정진용,정채영 조선대학교 전자정보통신연구소 1998 電子情報通信硏究所論文誌 Vol.1 No.1
Generalized Hough transform has been recognized as a powerful technique for a long time which can detect a curved element with a circle and an ellipse in binary image. When a circle and an ellipse is detected by using a generalized Hough transform, if another curved elements exist in the internal, only the external curved element are detected, but internal curved elements are not detected, because of looking upon it a s noise. This paper uses a coordinate point characteristic of the curved element from input image involved to the multiple curve, applying a repeat technique called CLEAT in order to detect multiple straight lines exactly in the voluntary image Then it detect ellipse by selecting eight point of ellipse which length of a perpendicular line become a maximum and minimum. Also, in the same way, it can detect and store a circle. After detected outmost curve is removed to make next inner curves, became outmost one. And it detected the double curved element, embodying a curved all curves can be detected in turn.
서영건(Yeoung-Geon Seo),최석환(Seok-Hwan Choi),오해석(Hae-Seok Oh),정문렬(Moon-Ryul Jung) 한국정보과학회 1996 한국정보과학회 학술발표논문집 Vol.23 No.1A
각 지방의 여러병원에 소재하고있는 의사들의 전문분야는 각기 다르며, 각 병원들의 진단설비 및 장비들도제각기 틀린다. 많은 의료정보나 의사 등을 이용해서 최적의 신속한 해를 찾아내는 데는 많은 정보를 빠르고 다양하게 이용하여야 할 것이다. 초고속 정보망의 의료정보 시스템은 의료용 영상 자료를 근거로 한 영상 회의로 압축된다. 의료 영상 자료는 CT, MR, CR, Angio 등으로 구분되며 이들 영상 자료는 원격지에 있는 유능한 의사에게로 동일하게 보여지며, 원격지의 의사의 소견을 이용해서 좀 더 나은 결과를 얻는 것이다. 이 때 이용되는 환경은 영상, 음성회의를 이용하고, 의료영상 자료는 원격지와 로컬에 동시에 보여지게 된다. 의료 정보 시스템의 구성요소는, 영상 음성 회의, 의료 영상의 3차원적 재구성, 의료 영상 보관, hand position 처리, 텍스트 데이타 처리 모듈로 구성된다.
단일 기관에서 10년간 시행한 갑상선 미세유두암의 내시경 갑상선 절제술의 경험
김영은(Yeoung-Eun Kim),곽하나(Ha-Na Kwak),김준호(Jun Ho Kim),최윤정(Yoon Jung Choi),윤지섭(Ji-Sup Yun),손병호(Byung Ho Son),박용래(Yong-Lai Park) 대한외과학회 2010 Annals of Surgical Treatment and Research(ASRT) Vol.79 No.5
Purpose: Endoscopic thyroid surgery has been widely used because of the cosmetic advantage and the development of laparoscopic instruments. We have performed endoscopic thyroidectomy by breast approach and gasless transaxillary approach on papillary thyroid microcarcinomas. In this study, we describe these two types of endoscopic procedures with the technique of the method and surgical outcomes. Methods: From Oct. 1999 to Oct. 2009, each procedure was performed in 162 patients divided into two groups. Breast approach group was in 91 patients and gasless transaxillary approach group was in 71 patients. We compared the results of mean ages, sex ratio, extent of operation, mean hospital stay, operating time, pathologic characteristics and postoperative complications between the breast approach group and gasless transaxillary approach group. Results: Ninety-one cases treated using breast approach, and seventy-one cases treated using gasless transaxillary approach. The operation time was 197.4±60.7 minutes (95∼350) in breast approach group, and 100.1±19.8 minutes (65∼140) in gasless transaxillary approach group. Post operative complications are; 2 cases of transient hoarseness, 8 cases of hypocalcemia (including 2 cases of permanent hypocalcemia), 2 cases of chest wall discomfort in breast approach group, and 1 case of transient hoarseness, 2 cases of transient hypocalcemia, 1 case of postoperative bleeding in gasless axillary approach group. Conclusion: Endoscopic thyroidectomy is a safe and technically feasible alternative to conventional thyroidectomy in patients with benign and highly selected malignant disease. We expect it can increase the extent of surgery.
한국산 도롱뇽 ( Hynobius leechii ) 의 농경지에서의 배 발생 이상과 살균제 Benomyl 의 독성효과
최영주(Yeoung Ju Choi),윤춘식(Chun Sik Yoon),박주홍(Joo Hung Park),진정효(Jung Hyo Jin),정선우(Seon Woo Cheong) 한국하천호수학회 2002 생태와 환경 Vol.35 No.3
A numerical variation and abnormalities were studied on egg bags and embryos of Korean salamander, Hynobius leechii from agricultural habitat. The teratogenic and toxic effects of fungicide benomyl were also investigated with early embryos from non-agricultural habitat. We collected 144 egg bags from agricultural region, and 3418 of early embryos were contained. The lengths of egg bags were varied from 10 to 23㎝ and the most frequent length was 19㎝. The number of embryos was varied from7 to 43, and the most frequent range was 22 to 26. Spontaneous abnormalities were occurred in 406 embryos among 116 egg bags, and 24 kinds of external abnormalities were found. Individuals showing severe external defect were histologically studied and they showed optic dyspalsia, thyroid carcinoma, somatic muscular dysplasia, partial biaxial structure, decrease of red blood cells in the heart, cephalic degeneration and intestinal dysplasia. 385 embryos from non-agricultural region were exposed to 200nM∼1μM of benomyl at blastula or gastrula for 12 days. All embryo were dead in the concentration of 1μM(LD_100) and 75% of embryos were dead in 800 nM of benomyl. Specific effect due to benomyl was acrania or cephalic dysplasia and this result suggests that the benomyl inhibit strongly to the development of neural tissue. These abnormal developments may be caused by antimitotic action, inhibition of tubulin complex, destruction of microtubule, inhibitions of neurulation and closing of neural fold, and by the inhibition of the movement of neural crest cells.