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Near-Infrared Autofluorescence Image-Guided Parathyroid Gland Mapping in Thyroidectomy
Kim, Sung Won,Lee, Hyoung Shin,Ahn, Yeh-Chan,Park, Chan Woo,Jeon, Seok Won,Kim, Chang Hoi,Ko, Jae Beom,Oak, Chulho,Kim, Yikeun,Lee, Kang Dae Elsevier 2018 Journal of the American College of Surgeons Vol.226 No.2
<P><B>Background</B></P> <P>Studies to date have shown that near-infrared autofluorescence imaging (NIR) can detect the parathyroid gland during thyroidectomy. However, there are no reports that NIR imaging can identify the parathyroid gland when it's covered with fibrofatty tissue before identification by a surgeon's naked eye. In this study, we investigated the feasibility of parathyroid gland mapping to facilitate early identification of the parathyroid gland during thyroidectomy.</P> <P><B>Study Design</B></P> <P>Seventy parathyroid glands from 38 patients who underwent thyroidectomy for papillary thyroid cancer were included in this prospective study. Near-infrared with infrared illumination (NIR-IR) imaging using a 780-nm light-emitting diode was conducted at the predicted locations of the superior or inferior parathyroid glands. Parathyroid mapping was conducted in 3 stages. Stages P1, P2, and P3 were defined as imaging before identification of the gland by direct visualization, imaging after identification, and imaging in the removed specimen, respectively.</P> <P><B>Results</B></P> <P>Sixty-four parathyroid glands (92.8%) could be localized in stage P1 before surgical dissection and exposure of the gland. Five parathyroid glands that were not detected at stage P1 were identified in stages P2 (4 cases, 5.8%) and P3 (1 case, 1.4%). One parathyroid gland was not identified in either the NIR imaging or the pathologic examination. The sensitivity, specificity, and accuracy of parathyroid gland mapping in stages P1, P2, and P3 were all 100%.</P> <P><B>Conclusions</B></P> <P>Parathyroid gland mapping using our NIR-IR imaging technique was feasible, with an excellent accuracy rate. This technique may be helpful for early identification of parathyroid glands during thyroidectomy.</P>
Automatic Thresholding Method for the Detection of Brain Ventricle in MRI Brain Images
Chulho Won,Dong-Hun Kim,Jyung-Hyun Lee,Sang-Hyo Woo,Chang-Wook Kim,Jin-Ho Cho 대한전자공학회 2007 ITC-CSCC :International Technical Conference on Ci Vol.2007 No.7
This paper suggests an algorithm that can detect a brain ventricle; compares that algorithm with the geodesic active contour model numerically and visually by applying real MRI brain images; and verifies the efficiency of the proposed algorithm.
지역정체성 기반 지역축제의 브랜드화를 위한 Z세대의 기대가치 연구
김철호(Chulho Kim) 한국문화융합학회 2023 문화와 융합 Vol.45 No.10
본 연구의 목적은, 지역 축제 참여자의 기대가치를 타당성 있게 확인하여 지역정체성 기반 축제의 차별화된 지역브랜드화에 도움이 되도록 이론적 토대를 제시하고 실무적 적용 필요성을 환기하는데 있다. Z 세대를 대상으로 한 정성적·정량적 조사가 실시되었다. 연구에 적용된 지역축제의 범위는 지역의 정체성과 쉽게 연계될 수 있는, 역사적 명소, 유적, 유물, 인물 관련 축제로 설정하였다. 연구 결과, Z세대의 지역 정체성 기반 축제에 대한 기대가치는 8개의 관점과 이에 따른 16개의 기대가치로 범주화 되었다. 이는 지역축제가 지역 정체성에 기반을 두고 차별화 된 브랜드로서 지속성 있게 포지셔닝 되기 위해서는 도출된 다양한 관점들을 고려하여 타겟층의 현재적·잠재적 기대가치에 부응해야 함의 제시하고있다. 나아가 이렇게 확인된 유목과 요인들을 바탕으로 통합적이면서도 타겟 지향적인 축제의 기획, 집행 및 성과관리를 추구해야 함을 보여준다. The purpose of this study is to validly check the value expectation of regional festival participants to suggest a theoretical foundation and raise the need for practical application to help differentiation of regional brandification of festivals based on regional identity. Quantitative and qualitative surveys were conducted on Generation Z. The scope of regional festivals for this research was set to festivals that can easily be correlated to historical landmarks, historical sites, artifacts, and people. Research results show that the value expectation of Generation Z on festivals based on regional identity could be categorized into 8 perspectives and 16 value expectations. This suggests that in order for regional festivals to be based on regional identity and position themselves as differentiated brands in the long term, they must meet current and potential value expectations of the target groups by considering various perspectives. Furthermore, it shows that integrated and target-oriented festival planning, execution, and performance management must be pursued based on the identified classifications and factors.
주거 커뮤니티 급탕 수요 예측을 위한 확률적 통계 모델 개발
김철호(Kim, Chulho),변지욱(Byun, Jiwook),고재현(Go, Jaehyun),허연숙(Heo, Yeonsook) 대한건축학회 2021 대한건축학회 학술발표대회 논문집 Vol.41 No.2
This study developed a series of probabilistic statistical models for domestic hot water demand prediction in residential communities. The series of probabilistic models were developed to reflect individual variation in the domestic hot water demand depending on household characteristics and temporal variability in the pattern of hourly domestic hot water use in a systematic manner. We used the hourly domestic hot water data from 15 households selected from the public data of the Korea Energy Agency. Models 1 and 2 are based on linear regression models to predict the annual average domestic hot water load depending on the household characteristics and variation in the daily domestic hot water load, respectively. Models 3 and 4 are based on the multivariate normal distribution and beta distribution probability density function to generate hourly domestic hot water load profiles reflecting temporal variation. As a result of applying probabilistic domestic hot water load profiles, individual and temporal variations were reflected.