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Im, Dong Jin,Hong, Su Jin,Park, Eun-Ah,Kim, Eun Young,Jo, Yeseul,Kim, Jeong Jae,Park, Chul Hwan,Yong, Hwan Seok,Lee, Jae Wook,Hur, Jee Hye,Yang, Dong Hyun,Lee, Bae-Young Korean Society of Magnetic Resonance in Medicine 2020 Investigative Magnetic Resonance Imaging Vol.24 No.1
This document is the third part of the guidelines for the interpretation and post-processing of cardiac magnetic resonance (CMR) studies. These consensus recommendations have been developed by a Consensus Committee of the Korean Society of Cardiovascular Imaging (KOSCI) to standardize the requirements for image interpretation and post-processing of CMR. This third part of the recommendations describes tissue characterization modules, including perfusion, late gadolinium enhancement, and T1- and T2 mapping. Additionally, this document provides guidance for visual and quantitative assessment, consisting of "What-to-See," "How-To," and common pitfalls for the analysis of each module. The Consensus Committee hopes that this document will contribute to the standardization of image interpretation and post-processing of CMR studies.
Dong Jin Im,Su Jin Hong,박은아,Eun Young Kim,Yeseul Jo,JeongJae Kim,Chul Hwan Park,Hwan Seok Yong,Jae Wook Lee,Jee Hye Hur,Dong Hyun Yang,Bae Young Lee 대한자기공명의과학회 2020 Investigative Magnetic Resonance Imaging Vol.24 No.1
This document is the third part of the guidelines for the interpretation and post-processing of cardiac magnetic resonance (CMR) studies. These consensus recommendations have been developed by a Consensus Committee of the Korean Society of Cardiovascular Imaging (KOSCI) to standardize the requirements for image interpretation and post-processing of CMR. This third part of the recommendations describes tissue characterization modules, including perfusion, late gadolinium enhancement, and T1- and T2 mapping. Additionally, this document provides guidance for visual and quantitative assessment, consisting of “What-to-See,” “How-To,” and common pitfalls for the analysis of each module. The Consensus Committee hopes that this document will contribute to the standardization of image interpretation and post-processing of CMR studies.
Lee Jae Wook,Hur Jee Hye,Yang Dong Hyun,Lee Bae Young,Im Dong Jin,Hong Su Jin,Kim Eun Young,Park Eun-Ah,Jo Yeseul,Kim Jeong Jae,Park Chul Hwan,Yong Hwan Seok 아시아심장혈관영상의학회 2019 Cardiovascular Imaging Asia Vol.3 No.4
Cardiovascular magnetic resonance imaging (CMR) is expected to be increasingly used in Korea due to technological advances and the expanded national insurance coverage of CMR assessments. For improved patient care, proper acquisition of CMR images as well as their accurate interpretation by well-trained personnel are equally important. In response to the increased demand for CMR, the Korean Society of Cardiovascular Imaging (KOSCI) has issued interpretation guidelines in conjunction with the Korean Society of Radiology. KOSCI has also created a formal Committee on CMR guidelines to create updated practices. The members of this committee review previously published interpretation guidelines and discuss the patterns of CMR use in Korea.
Lee, Jae Wook,Hur, Jee Hye,Yang, Dong Hyun,Lee, Bae Young,Im, Dong Jin,Hong, Su Jin,Kim, Eun Young,Park, Eun-Ah,Jo, Yeseul,Kim, Jeong Jae,Park, Chul Hwan,Yong, Hwan Seok Korean Society of Magnetic Resonance in Medicine 2019 Investigative Magnetic Resonance Imaging Vol.23 No.4
Cardiovascular magnetic resonance imaging (CMR) is expected to be increasingly used in Korea due to technology advances and the expanded national insurance coverage of these tests. For improved patient care, it is crucial not only that CMR images are properly acquired but that they are accurately interpreted by well-trained personnel. In response to the increased demand for CMR, the Korean Society of Cardiovascular Imaging (KOSCI) has issued interpretation guidelines in conjunction with the Korean Society of Radiology (KSR). KOSCI has also created a formal Committee on CMR Guidelines to write updated practices. The members of this Committee review previously published interpretation guidelines and discuss the patterns of CMR use in Korea.
윤지예,박현아,강재헌,김경우,Yang Im Hur,Jin Joo Park,Ran Lee,Hyun Hye Lee 대한의학회 2012 Journal of Korean medical science Vol.27 No.5
The purpose of this study was to estimate the prevalence of dietary supplement (DS) use in Korean children and adolescents and to examine the related factors associated with DS use from the 4th Korea National Health and Nutrition Examination Survey. Total 6,131participants aged between 2 and 18 yr were included in the analysis. We estimated the prevalence of DS use mainly from the DS questionnaire data of the Nutrition Survey. Reported supplements were classified according to the Health Functional Food Code. We also assessed the relationship between DS use and anthropometry, socioeconomic factors,health behaviors, and chronic diseases. Approximately 34% of Korean children and adolescent was taking DS. Younger age (P = 0.003), higher household income (P < 0.001),presence of chronic diseases (P = 0.05), regular meal consumption (P = 0.002), frequent snack consumption (P = 0.001), and normal body mass index rather than overweight (P = 0.10) or obesity (P = 0.03) were associated with the DS use after adjustment for related factors. Vitamin/mineral supplements (343.5/103 persons) were the most commonly taken DS in Korean children and adolescents, followed by Omega-3 (28.8), ginseng (18.3),colostrums (14.1) and chlorella/spirulina (10.0). In conclusion, DS use is common as much as in 34% of Korean children and adolescents and is associated with age, household income level, chronic diseases, meal regularity, and obesity status.
Shin, Seong Sik,Yeom, Eun Joo,Yang, Woon Seok,Hur, Seyoon,Kim, Min Gyu,Im, Jino,Seo, Jangwon,Noh, Jun Hong,Seok, Sang Il American Association for the Advancement of Scienc 2017 Science Vol.356 No.6334
<P>Perovskite solar cells (PSCs) exceeding a power conversion efficiency (PCE) of 20% have mainly been demonstrated by using mesoporous titanium dioxide (mp-TiO2) as an electron-transporting layer. However, TiO2 can reduce the stability of PSCs under illumination (including ultraviolet light). Lanthanum (La)-doped BaSnO3 (LBSO) perovskite would be an ideal replacement given its electron mobility and electronic structure, but LBSO cannot be synthesized as well-dispersible fine particles or crystallized below 500 degrees C. We report a superoxide colloidal solution route for preparing a LBSO electrode under very mild conditions (below 300 degrees C). The PSCs fabricated with LBSO and methylammonium lead iodide (MAPbI(3)) show a steady-state power conversion efficiency of 21.2%, versus 19.7% for a mp-TiO2 device. The LBSO-based PSCs could retain 93% of their initial performance after 1000 hours of full-Sun illumination.</P>
Application of Machine Learning Algorithms to Predict Osteoporotic Fractures in Women
Su Jeong Kang,Moon Jong Kim,Yang-Im Hur,Ji-Hee Haam,Young-Sang Kim 대한가정의학회 2024 Korean Journal of Family Medicine Vol.45 No.3
Background: Predicting the risk of osteoporotic fractures is vital for prevention. Traditional methods such as the Fracture Risk Assessment Tool (FRAX) model use clinical factors. This study examined the predictive power of the FRAX score and machine-learning algorithms trained on FRAX parameters. Methods: We analyzed the data of 2,147 female participants from the Ansan cohort study. The FRAX parameters employed in this study included age, sex (female), height and weight, current smoking status, excessive alcohol consumption (>3 units/d of alcohol), and diagnosis of rheumatoid arthritis. Osteoporotic fracture was defined as one or more fractures of the hip, spine, or wrist during a 10-year observation period. Machine-learning algorithms, such as gradient boosting, random forest, decision tree, and logistic regression, were employed to predict osteoporotic fractures with a 70:30 training-to-test set ratio. We evaluated the area under the receiver operating characteristic curve (AUROC) scores to assess and compare the performance of these algorithms with the FRAX score. Results: Of the 2,147 participants, 3.5% experienced osteoporotic fractures. Those with fractures were older, shorter in height, and had a higher prevalence of rheumatoid arthritis, as well as higher FRAX scores. The AUROC for the FRAX was 0.617. The machine-learning algorithms showed AUROC values of 0.662, 0.652, 0.648, and 0.637 for gradient boosting, logistic regression, decision tree, and random forest, respectively. Conclusion: This study highlighted the immense potential of machine-learning algorithms to improve osteoporotic fracture risk prediction in women when complete FRAX parameter information is unavailable.
경기도 남부 지역에서 발생한 쯔쯔가무시병 212예의 임상적 특성 및 초기 단순 흉부 엑스선 사진의 의의
위성헌,장우임,김형욱,허지안,김상일,김양리,강문원 대한감염학회 2008 감염과 화학요법 Vol.40 No.1
목적 : 쯔쯔가무시병의 임상 양상은 적절한 항균제 투여에 의해 쉽게 치료될 수 있는 경미한 경우에서 생명을 위협하는 합병증을 동반하는 중증 질환까지 다양하다. 발열, 발진, 가피 등 특징적인 임상 증상을 통해 조기에 진단하는 것이 예후에 중요하며 중증도를 예측할 수 있는 임상적인 지표를 조기에 확인하는 것도 효과적인 치료를 위해 매우 중요하다. 재료 및 방법 : 2000년 1월부터 2004년 12월까지 가톨릭대학교 성빈센트병원에 쯔쯔가무시병으로 입원한 18세 이상의 환자 212명에 대한 의무 기록을 후향적으로 검토하여 임상 양상, 실힘실, 소견 및 단순 흥부 엑스선 사진의 판독 소견을 분석하였다. 결과 : 환자들의 평균 연령은 59.7세였고, 여성이 145명, 남성이 67명이었다. 총 212명의 쯔쯔가무시병 환자들에게 7일간 독시사이클린을 투여하였고, 사망한 1명을 제외한 211명(99.5%)에서 후유증이나 재발 없이 치료에 성공하였다. 총 212명 중 59명(27.8%)에서 단순 흉부 엑스선상 흉막 삼출, 간질성 폐렴 및 폐침윤 등의 비정상 소견이 관찰되었는데, 정상 소견을 보인 환자군에 비해 혈청 C-반응 단백이나 ADA 수치가 더 높았고, 혈색소 수치나 혈청 알부민 수치는 더 낮았다. 그러나 항균제 투여 후 체온이 정상화되는데 걸린 시간이나 치료 실패율에서는 통계적으로 의미 있는 차이를 보이지 않았다. 결론 : 쯔쯔가무시병 환자들에게 독시사이클린을 하루 200 mg씩 7일간 투여하여 효과적으로 치료할 수 있었다. 향후 내원 초기 환자들의 실험실적 결과를 예측하는 지표로서 단순 흥부 엑스선 소견이 이용될 수 있을 것이다. Background : Scrub typhus may cause complications such as pneumonia, meningoencephalitis, liver failure, and renal failure, although most of patients with scrub typhus are treated with appropriate antibiotics. scrub typhus has varying degree of disease severity, from mild to fatal, therefore, early recognition of the clinical parameters representing the severity of the disease is a very important factor for effective treatment. Materials and Methods : We investigated clinical, laboratory results and simple chest X-ray images retrospectively by reviewing the medical records of 212 scrub typhus patients, admitted to Catholic University St. Vincent's Hospital from September 2000 to November 2004. Results : Patients demographics revealed a mean age of 59.7, (age: 18 to 90), and 145 of the 212 patients were female (68.4%). Cure was achieved in 211 (99.5%) of the 212 patients with the 1-week course of daily 200 mg doses of doxycycline. Fifty-nine (27.8%) of the patients revealed the abnormal findings, such as interstitial, pneumonic infiltrations, or pleural effusions, in the results of simple chest X-ray images, and cure was achieved in 58 (98.3%) of 59 patients. The median time to defervescence was 27.1 h for the group showing abnormal simple chest X-ray findings, 23.3 h for the group showing normal chest X-ray findings. The titers of serum C-reactive protein and adenine deaminase were significantly higher, and initial hemoglobin and serum albumin levels were lower, in the group with abnormal simple chest X-ray findings, compared to the group with normal simple chest X-ray findings. Conclusion : The 1-week course of daily 200-mg doses of doxycycline was effective for the treatment of scrub typhus. Initial simple chest X-ray findings may be useful in the selection of patients, who might show more favorable laboratory findings.