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SLE 환자에서의 Listeria Monocytogenes에 의한 뇌막염 2예
임현옥,최진학,이종석,김건호,함종렬,심상군,신원호,우성경 대한감염학회 1991 감염 Vol.23 No.3
Listeria meningitis can occur in the late neonatal setting(after 3 days of age) or in the immunosuppressed adult. Factors in common among the immunosuppressed patients include underlying diseases or therapy that primarily affects the thymus-derived lymphocytes or mononuclear phagocyte system. We experienced two cases of Listeria meningitis in patients with SLE who had been receiving steroid therapy for their primary disease. The organism, Listeria monocytogenes, found in blood and cerebrospinal fluid (CSF).
의료 CT 영상으로 얻은 디지털 방사선 이미지와 X-ray 간의 고속 정합을 위한 최적화 방법
우성경(Sungkyung Woo),백승엽(Seung-Yeob Back),이건우(Kunwoo Lee) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
TKA is surgery to replace worn and broken knee-joint into artificial joint made by steel or ceramics and etc. Digitally reconstructed radiography from 3D CT data should be extracted in order to be compared with X-ray image of patient. The accuracy of whole process of TKA surgery should be evaluated so that force distribution of body weight can be well defined. And also during surgery, the process should be checked to make sure if the axis of bones are well aligned. This process should be done as short as possible, because time delay may cause failure of whole process. Several optimization methods are compared in order to accomplish rapid registration of 3D CT to 2D x-ray image. In this paper, the applied Powells method will be used for making rapid registration of Medical Image, and the time matter will be analyzed. And also the reduction of error of registration process will be discussed.
슬관절의 3 차원 CT 영상과 2 차원 Xray 영상의 고속 정합에 알맞은 최적화 단계의 설정 방법 연구
우성경(Sungkyung Woo),감동욱(Donguk Kam),김대욱(Dae Wook Kim),이건우(Kunwoo Lee) (사)한국CDE학회 2016 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2016 No.동계
Numbers of patients who agree to take ‘Robotic Surgery’ rather than real human doctor is continually increasing. While taking TKA, Total Knee Anthropology, the accurate registration of the tibia bone and femur bone is needed, because the knee joint has to stand for human weight. TKA is surgery for replacing knee joint with the implant knee joint. We suggest the surgery plan should be performed by using radiography with information brought by registration of the CT image and X-ay image. Because of the unique shape of the knee joint, tibia, and femur, we also suggest which similarity metric produce the best result of registration. In order to do that, we also give guideline for using optimization methods for registration of medical images. The optimization methods showed different result which depends on the combination of similarity metric and optimization methods. The research also finds out which and why the combination caused different result.
단계식 입력 체계를 이용한 시선 추적 기반의 한글 입력 인터페이스 설계
김호중(Hojoong Kim),우성경(Sung-kyung Woo),이건우(Kunwoo Lee) 한국HCI학회 2017 한국HCI학회 논문지 Vol.12 No.4
Eye-typing은 인간-컴퓨터 상호작용의 일종으로 시선의 위치 정보를 기반으로 하는 입력 체계이다. 눈동자의 움직임 이외의 물리적 행위를 필요로 하지 않아 거동이 어려운 전신마비 환자들을 위한 입력 수단으로 널리 사용된다. 하지만 eye-typing을 위한 한글 기반의 인터페이스는 거의 제시되지 않은 것이 현실이다. 이에 본 연구에서는 한글 입력에 최적화된 eye-typing 입력 체계를 구현하였다. 우선 큰 잡음과 Midas touch problem으로 대표되는 eye-typing의 특성을 고려하여 설계 목표를 정립하였다. 잡음 문제를 해결하기 위해 개별 버튼의 크기를 극대화하기 위해 단계식 입력 체계를 도입하였고 Midas touch problem을 해결하기 위해 입력 영역 중간에 시선 보류 영역을 두었다. 다음으로 각 음절이 자음과 모음의 조합으로 생성되는 한글의 언어학적 특성에 대한 고찰을 바탕으로 두 종류의 eye-typing 인터페이스를 설계하였다. 각각 자모 일체형, 자모 분리형 인터페이스로 정의한 두 인터페이스는 한글의 자모음을 유형화하여 단계적으로 입력하도록 구현되었다. 그리고 이들의 성능을 검증하기위해 한글 두벌식 자판과 비교하고 입력 과정에서 시선의 동선을 분석하는 실험을 수행하였다. 그 결과, 제시한 인터페이스가 실용적인 eye-typing 수단으로 활용될 가능성이 충분함을 확인하였다. Eye-typing is one kind of human-computer interactive input system which is implemented by location data of gaze. It is widely used as an input system for paralytics because it does not require physical motions other than the eye movement. However, eye-typing interface based on Korean character has not been suggested yet. Thus, this research aims to implement the eye-typing interface optimized for Korean. To begin with, design objectives were established based on the features of eye-typing: significant noise and Midas touch problem. Multilevel input system was introduced to deal with noise, and an area free from input button was applied to solve Midas touch problem. Then, two types of eye-typing interfaces were suggested on phonological consideration of Korean where each syllable is generated from combination of several phonemes. Named as consonant-vowel integrated interface and separated interface, the two interfaces are designed to input Korean in phases through grouped phonemes. Finally, evaluation procedures composed of comparative experiments against the conventional Double-Korean keyboard interface, and analysis on flow of gaze were conducted. As a result, newly designed interfaces showed potential to be applied as practical tools for eye-typing.