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Kang Si-Hyuck,Kim Soo-Hyun,Kim Sun-Hwa,Chun Eun Ju,Chung Woo-Young,Yoon Chang-Hwan,Park Sang-Don,Nam Chang-Wook,Kwon Ki-Hwan,Doh Joon-Hyung,Byun Young-Sup,Bae Jang-Whan,Youn Tae-Jin,Chae In-Ho 대한의학회 2023 Journal of Korean medical science Vol.38 No.32
Background: Fractional flow reserve (FFR) based on computed tomography (CT) has been shown to better identify ischemia-causing coronary stenosis. However, this current technology requires high computational power, which inhibits its widespread implementation in clinical practice. This prospective, multicenter study aimed at validating the diagnostic performance of a novel simple CT based fractional flow reserve (CT-FFR) calculation method in patients with coronary artery disease. Methods: Patients who underwent coronary CT angiography (CCTA) within 90 days and invasive coronary angiography (ICA) were prospectively enrolled. A hemodynamically significant lesion was defined as an FFR ≤ 0.80, and the area under the receiver operating characteristic curve (AUC) was the primary measure. After the planned analysis for the initial algorithm A, we performed another set of exploratory analyses for an improved algorithm B. Results: Of 184 patients who agreed to participate in the study, 151 were finally analyzed. Hemodynamically significant lesions were observed in 79 patients (52.3%). The AUC was 0.71 (95% confidence interval [CI], 0.63–0.80) for CCTA, 0.65 (95% CI, 0.56–0.74) for CT-FFR algorithm A (P = 0.866), and 0.78 (95% CI, 0.70–0.86) for algorithm B (P = 0.112). Diagnostic accuracy was 0.63 (0.55–0.71) for CCTA alone, 0.66 (0.58–0.74) for algorithm A, and 0.76 (0.68–0.82) for algorithm B. Conclusion: This study suggests the feasibility of automated CT-FFR, which can be performed on-site within several hours. However, the diagnostic performance of the current algorithm does not meet the a priori criteria for superiority. Future research is required to improve the accuracy.
Kang, Boseok,Min, Honggi,Seo, Unsuk,Lee, Junghwi,Park, Namwoo,Cho, Kilwon,Lee, Hwa Sung WILEY‐VCH Verlag 2013 ADVANCED MATERIALS Vol.25 No.30
<P><B>A capillary pen drawing technique, developed as a new patterning methodology</B> for the large‐area patterning and fabrication of organic electronics, provides several advantages over conventional approaches: the method is simple and versatile, there are no restrictions on the patterning shapes that could be produced, and the method can be tailored to a variety of substrates.</P>
Elucidation of Bacterial Pneumonia-Causing Pathogens in Patients with Respiratory Viral Infection
( Hwa Sik Jung ),( Byung Ju Kang ),( Seung Won Ra ),( Kwang Won Seo ),( Yangjin Jegal ),( Jae-bum Jun ),( Jiwon Jung ),( Joseph Jeong ),( Hee-jeong Jeon ),( Jae-sung Ahn ),( Taehoon Lee ),( Jong Joon 대한결핵 및 호흡기학회 2018 Tuberculosis and Respiratory Diseases Vol.81 No.4
Evaluation of Changes in Agricultural Stream Water Quality of Small Watershed in Jeonnam Province
Sung-Woo Kim,Sun Kook Kim,Hyeon Ji Kim,So Yeon Lee,Myeong Seok Kim,Jeong-Hwa Kang,Seung-Oh Hur,Soon Ik Kwon 한국토양비료학회 2019 한국토양비료학회지 Vol.52 No.4
This study aimed to identify the changing trends in the agricultural water quality of the major watersheds in Jeonnam Province over a 10-year period ranging from 2007 to 2016. The results of water quality analysis of the study sites revealed that the mean Chemical Oxygen Demand in April, July, and October was 3.20, 3.04, and 2.37 mg L<SUP>-1</SUP>, respectively, with the median values being 2.85, 2.84, and 1.96 mg L<SUP>-1</SUP>, respectively. The mean values of EC (Electrical Conductivity) in April, July, and October were 0.15, 0.15, and 0.17 dS m<SUP>-1</SUP>, respectively. The mean EC values were lower in April and slightly higher in October, and there was no yearly fluctuation. The mean and median values of the T-N (Total Nitrogen) content were 3.41 mg L<SUP>-1</SUP> and 3.18 mgL<SUP>-1</SUP>, respectively. A large deviation in the T-N content was only observed in April 2009 and July 2015. The mean and median values of the T-P (Total Phosphorous) content were 0.09 mg L<SUP>-1</SUP> and 0.05 mg L<SUP>-1</SUP>, respectively. No fluctuations were observed in the T-P content in the months of April, July, and October, during the study period, with the exception of July 2016 and October 2016.