Simultaneous Assessment of Left Ventricular Function and Coronary Artery Anatomy by Third-generation Dual-source Computed Tomography Using a Low Radiation Dose

이지원,Kyung Jin Nam,김진유,정연주,이지원,So Min Park,Soo Jin Lim,추기석 한국심초음파학회 2020 Journal of Cardiovascular Imaging (J Cardiovasc Im Vol.28 No.1

BACKGROUND: To assess left ventricular function and coronary artery simultaneously by third-generation dual-source computed tomography (CT) using a low radiation dose. METHODS: A total of 48 patients (36 men, 12 women; mean age 57.0 ± 9.5 years) who underwent both electrocardiography-gated cardiac CT angiography (CCTA) using 70–90 kVp and echocardiography were included in this retrospective study. The correlation between left ventricular end-diastolic volume (LVEDV), left ventricular end-systolic volume (LVESV), and left ventricular ejection fraction (LVEF) measured using CCTA and echocardiography was determined. The quality of coronary artery images was analyzed using a 4-point scale (1, excellent; 4, poor). The effective radiation dose of CCTA was calculated. RESULTS: Mean heart rate during the CT examination was 59.9 ± 9.9 bpm (range 38–79) and the body mass index of 48 patients was 24.5 ± 2.6 kg/m2 (range 17.0–29.4). LVEDV, LVESV, and LVEF measured using CCTA and echocardiography demonstrated a fair to moderate correlation (Pearson correlation coefficient: r = 0.395, p = 0.005 for LVEDV; r = 0.509. p < 0.001 for LVESV; r = 0.551, p < 0.001 for LVEF). Average image quality score of coronary arteries was 1.0 ± 0.1 (range 1–2). A total of 99.0% (783 of 791) of segments had an excellent image quality score, and 1.0% (8 of 791) of segments had a good score. Mean effective radiation dose was 2.2 ± 0.7 mSv. CONCLUSIONS: Third-generation dual-source CT using a low tube voltage simultaneously provides information regarding LV function and coronary artery disease at a low radiation dose. It can serve as an alternative option for functional assessment, particularly when other imaging modalities are inadequate.

Predictive Value of Cardiac Magnetic Resonance Imaging-Derived Myocardial Strain for Poor Outcomes in Patients with Acute Myocarditis

이지원,정연주,이지원,이남경,이혜원,김진유,최범성,추기석 대한영상의학회 2017 Korean Journal of Radiology Vol.18 No.4

Objective: To evaluate the utility of cardiovascular magnetic resonance (CMR)-derived myocardial strain measurement for the prediction of poor outcomes in patients with acute myocarditis. Materials and Methods: We retrospectively analyzed data from 37 patients with acute myocarditis who underwent CMR. Left ventricular (LV) size, LV mass index, ejection fraction and presence of myocardial late gadolinium enhancement (LGE) were analyzed. LV circumferential strain (EccSAX), radial strain (ErrSAX) from mid-ventricular level short-axis cine views and LV longitudinal strain (EllLV), radial strain (ErrLax) measurements from 2-chamber long-axis views were obtained. In total, 31 of 37 patients (83.8%) underwent follow-up echocardiography. The primary outcome was major adverse cardiovascular event (MACE). Incomplete LV functional recovery was a secondary outcome. Results: During an average follow-up of 41 months, 11 of 37 patients (29.7%) experienced MACE. Multivariable Cox proportional hazard regression analysis, which included LV mass index, LV ejection fraction, the presence of LGE, EccSAX, ErrSAX, EllLV, and ErrLax values, indicated that the presence of LGE (hazard ratio, 42.88; p = 0.014), together with ErrLax (hazard ratio, 0.77 per 1%, p = 0.004), was a significant predictor of MACE. Kaplan-Meier analysis demonstrated worse outcomes in patient with LGE and an ErrLax value ≤ 9.48%. Multivariable backward regression analysis revealed that ErrLax values were the only significant predictors of LV functional recovery (hazard ratio, 0.54 per 1%; p = 0.042). Conclusion: CMR-derived ErrLax values can predict poor outcomes, both MACE and incomplete LV functional recovery, in patients with acute myocarditis, while LGE is only a predictor of MACE.

상담 챗봇 구현을 위한 시나리오 개발 및 유용성 검증

이지원,양현정,김지근 한국콘텐츠학회 2019 한국콘텐츠학회논문지 Vol.19 No.4

The purpose of this study is to develop the scenario for implementation of the rule-based counseling chatbot and to verify its usefulness. For this purpose, counseling scenario for exploring problems triggering depression and establishing early counseling relationships was built and user evaluations for the rule-base counseling chatbot were conducted on 10 counseling psychologists. As a result, clear counseling structuring, appropriate use of selective and narrative responses, and active listening were identified as important components of counseling chatbot. To the next step, the usefulness of counseling chatbot developed in the previous step was examined with 78 college students. As a result, active listening was found to be an important factor in improving user satisfaction and positive mood change. In addition, through qualitative analysis of user evaluation, the unique advantages of counseling chatbot were identified and the limitations of counseling chatbot that should be overcome were identified. Based on the results of the study, the implications of the study and suggestions for future research were discussed. 본 연구는 상담 챗봇 구현의 기반이 되는 대화 시나리오를 개발하고, 룰 기반 상담 챗봇을 통해 그 유용성을 검증하는데 목적이 있다. 이를 위해 우울감과 관련된 호소문제 탐색 및 초기 상담관계 확립을 위한 상담 시나리오를 개발하고 이를 룰 기반 상담 챗봇으로 설계하였으며, 상담심리전문가 10인을 대상으로 사용자 평가를 실시하였다. 그 결과, 명확한 상담 구조화, 선택형 및 서술형 응답의 적절한 활용, 룰 기반 챗봇에 특화된 경청반응이 상담 챗봇의 중요 요소로 확인되었다. 상담 챗봇 유용성 평가에서는 대학생 78명을 대상으로 최종 개발된 상담 챗봇의 활용 가능성을 확인하였다. 그 결과, 적극적 경청은 사용자의 상담 만족도를 높이고 긍정적 기분변화를 일으키는 중요한 요소로 확인되었다. 또한 사용자 평가의 질적 분석을 통해 상담 챗봇이 지니는 고유한 장점이 확인되었으며, 동시에 상담 챗봇이 극복해야 하는 한계점이 파악되었다. 연구결과를 바탕으로 연구의 의의와 추후연구를 위한 제언을 논하였다.

배우자 사별 경험 여성 노인을 위한 상실 치유 프로그램 효과

이지원,유지영,이승희 한국통합사례관리학회 2022 한국케어매니지먼트연구 Vol.- No.45

본 연구는 배우자 사별 경험 노인의 애도를 돕기 위해 Neimeyer의 의미재구성 이론을 토대로 상실 치유 프로그램 구성과 적용의 효과성 검증함으로써 치료적 개입으로 현장에서 적용의 폭을 넓히는데 목적이 있다. 프로그램의 효과를 알아보고자 실험집단 16명, 대조집단 16명을 대상으로 비동등성 대조군 사전-사후 설계하였다. 실험집단에 본 프로그램을 제공하고, 측정도구로 사별 스트레스, 우울, 회복탄력성, 삶의 질을 이용하여 사전, 사후, 프로그램 종료 4주 후 추후조사를 실시하였다. 시기별 상호작용 효과 검증을 위해 반복측정 ANOVA을 실시한 결과, 사별 스트레스(F=17.020, p<.001), 우울(F=8.706, p<.01), 회복탄력성(F=17.209, p<.001), 삶의 질(F=26.279, p<.001) 모두 유의미하였다. 이는 배우자 사별 여성 노인에게 긍정적 영향이 있음을 알 수 있었다. 본 연구의 의의는 다음과 같다. 상실 치유 프로그램은 충분한 애도의 시간을 갖음으로 죽음 의미의 성찰과상실에 대한 의미 재해석, 부정적 감정의 낮춤과 일상생활에 재적응하는 데 도움이 될 것이다. 아울러 영적 성숙과 자존감, 행복감의 강화로 노년기 삶의 질 향상에 활용할 수 있을 것이다. 향후 지역사회 연계기관과 협력을 통해 상실 치유 프로그램의 제공과 매뉴얼화로 사별 경험 대상자의 삶의 재설정에 기여할 수 있을 것이다.

효과적인 일반물리 교수법 -동료교수법과 튜토리얼을 중심으로-

이지원,김중복 한국물리학회 2014 새물리 Vol.64 No.2

Students have difficulties in learning general physics even though it is very important to students in the science and engineering, well as the medical, fields. One of reasons for that difficulty is not the teaching-learning process, but the one-sided transfer of results. Tutorial and Peer Instruction methodologies have been developed in order to construct scientific concepts. We believe that these two methodologies could be innovations in teaching physics. They concentrate on the process of knowledge construction in students' brains through active interaction among materials, instructors, and learners in order to change learners' concepts into scientific concepts. Here, we introduce a method that combines the benefits of these two instruction methodologies. 일반물리를 배우는 학생들은 그 과목의 중요성에도 불구하고 매우 어렵게 생각한다. 그 원인 중 하나는 과정이 아닌 결과의 일방적 전달로 교육되어지기 때문이다. 학습자가 스스로 과학적 개념을 구성하도록 하기 위한 교수방법의 혁신 노력의 일환으로 튜토리얼과 동료교수법이 개발되었다. 이 두 교수법은 학습자의 개념을 변화시키기 위해 교재, 교수자, 학습자 간의 상호작용을 통해 머릿속에서 지식이 구성되는 과정을 강조한다. 여기에서는 이 두 교수법과 이들의 장점을 모은 통합적인 접근법을 소개하고자 한다.

[Market Watch] 롯데웰푸드_빼빼로월드 열렸다

이지원 더스쿠프 2023 더스쿠프 Vol.- No.568

역사 공간의 서사적 재현: 隋煬帝艶史 읽기

이지원 한국중국산문학회 2019 중국산문연구집간 Vol.9 No.-

In this article, I analyzed the narrative features of Sui Yangdi Yanshi, one of the historical romance(歷史演義) published in late Ming, focusing on the aspect of representations of the historic space. This is because the literary features of Sui Yangdi Yanshi, which are distinct from the historical narratives of the previous period, and similar to other types of feature-length vernacular fiction, are believed to be closely related to the representation of historic space. Sui Yangdi Yanshi made up a long narrative by modifying, supplementing and rearranging numerous historical events recorded in the previous historical narratives. The most powerful key driver of this work is the representations of historic space. In this work, 長安 is represented as a space that reveals the imbalance of power, 西苑 of 洛陽 as a space of pleasure full of luxury and entertainment, 大運河 as a space of pleasure and crisis at the same time. And 迷樓 of 江都 is represented as a space created for pleasure but cannot satisfy desires unlike 西苑. Sui Yangdi Yanshi constructs the narrative in a mutual-subjective way that represents space through characters and events and shapes characters and events through the representations of space. As a result Sui Yangdi Yanshi becomes a more self-complete text and produces various meanings.

국내 저가화장품 브랜드 로고의 시각적 특성

이지원,신장희,나수임 한국인체미용예술학회 2013 한국인체미용예술학회지 Vol.14 No.4

This paper investigated the brand shops of low price cosmetics in Korea and the brand concepts pursued by these cosmetics brands in order to analyze the features of their brand logos. This paper aimed to analyze the types used in brand logos, the relationship between brand concepts and colors, and the visual features applied to colors and fonts and to ultimately investigate the general trends of components used in the brand logos of low price cosmetics. The most frequently used words in the concepts of low price cosmetic brands were 'nature', 'purity' and 'food.' Those words were used in concepts emphasizing natural aspects due to the trend of pursuing well-being. Other words included 'romantic' and 'princess like', targeting the young generation. The logo marks of low price cosmetic brands tended to emphasize function to give information presented by accurate brand names using the entire brand names. Spherical symbols were preferred because they were suitable for brand names and the concepts of each company and could enable easy interpretation and image delivery. The brand logos of low price cosmetics in Korea are important elements symbolizing brand concepts, functions or features. Further research is needed to investigate the logos in greater detail as the approach to identify brand logo designs that can enhance brand image and build brand power.

천연다당류의 황산화 및 그의 혈액적합성

이지원,김공수,이민희,김태경 한국공업화학회 2001 한국공업화학회 연구논문 초록집 Vol.2001 No.1

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[Special Report_PART3] 청년 10명이 박영선에게 묻다 : “위기를 기회로…” 청년특별시의 꿈

이지원 더스쿠프 2021 더스쿠프 Vol.- No.434