A5101928541- Advanced Neuroimaging Techniques and Applications
- Functional Brain Connectivity Studies
- Metabolomics and Mass Spectrometry Studies
- Image and Signal Denoising Methods
- Neuroscience and Neuropharmacology Research
- ECG Monitoring and Analysis
- Advanced Data Compression Techniques
- Orthopedic Infections and Treatments
- Central Venous Catheters and Hemodialysis
- Nosocomial Infections in ICU
- Clostridium difficile and Clostridium perfringens research
- Streptococcal Infections and Treatments
- Advanced MRI Techniques and Applications
- Mitochondrial Function and Pathology
- Infectious Diseases and Tuberculosis
- Advanced Image Fusion Techniques
- Neonatal and fetal brain pathology
- Actinomycetales infections and treatment
- Surgical site infection prevention
- Advanced Technologies in Various Fields
- Biofield Effects and Biophysics
- Liver Disease Diagnosis and Treatment
- Impact of Technology on Adolescents
- Dental Research and COVID-19
- Antimicrobial Resistance in Staphylococcus
Yonsei University
2000-2024
Kyung Hee University Dental Hospital
2024
Kyung Hee University
2018-2022
Gyeongsan Science High School
2017
Eulji University
2016
Rensselaer Polytechnic Institute
2003
Ewha Womans University Medical Center
2002
A wavelet electrocardiogram (ECG) data codec based on the set partitioning in hierarchical trees (SPIHT) compression algorithm is proposed this paper. The SPIHT (A. Said and W.A. Pearlman, IEEE Trans. Ccts. Syst. II, vol. 6, p. 243-50, 1996) has achieved notable success still image coding. authors modified for one-dimensional case applied it to of ECG data. Experiments selected records from MIT-BIH arrhythmia database revealed that significantly more efficient computation than previously...
Abstract Study Objectives To assess, using fractional anisotropy (FA) analysis, alterations of brain network connectivity in adults with obstructive sleep apnea (OSA). Abnormal networks could mediate clinical functional deficits and reflect tissue injury. Methods Structural were constructed diffusion tensor imaging (DTI) from 165 healthy (age 57.99 ± 6.02 years, male 27.9%) 135 OSA participants 59.01 5.91 28.9%) global properties (strength, efficiency, local efficiency) regional efficiency...
Methicillin-resistant
This study evaluated the feasibility of utilizing a 3D-printed anthropomorphic patient-specific head phantom for quality assurance (QA) in intensity-modulated radiotherapy (IMRT). Contoured left and right phantoms were converted from DICOM to STL format. Fused deposition modeling (FDM) was used construct an with 3D printer. An established QA technique compare calculated measured doses. When doses, gamma passing rate γ ≤ 1 97.28%, while failure > 2.72%. used, 95.97%, 4.03%. The printed...
Background Empiric antibiotic therapy for suspected hematogenous vertebral osteomyelitis (HVO) should be initiated immediately in seriously ill patients and may required those with negative microbiological results. The aim of this study was to inform the appropriate selection empiric regimens treatment HVO by analyzing antimicrobial susceptibility isolated bacteria from microbiologically proven HVO. Method We conducted a retrospective chart review adult five tertiary-care hospitals over...
Objective: Topological characteristics of the brain can be analyzed using structural networks constructed by diffusion tensor imaging (DTI). When a network is existing parcellation method, structure changes depending on scale and arbitrary thresholding. To overcome these issues, we propose to construct improved ε-neighbor construction, which free construction technique. Methods: We acquired DTI from 14 control subjects 15 with autism. examined differences in topological properties proposed...
Although problematic overuse of internet has increased, psychopathological characteristics and neurobiological mechanisms for addiction (IA) remain poorly understood. Therefore, it is necessary to investigate the impact IA on brain. The present study included 17 subjects with 20 healthy subjects. We constructed structural brain network from diffusion tensor imaging data investigated alteration connections in using analysis global local levels. showed increase regional efficiency (RE)...
Sleep restriction (SR) is defined as the condition of not having enough sleep, and it can cause brain injury. In this study, we examined impact SR on structural network. We obtained diffusion MRI (dMRI) data for group fourteen participants who got less than or equal to 5.5 h sleep last 1 month normal same number 7 sleep. constructed networks from dMRI analyzed them using graph theoretical approaches. comparison with group, showed higher vulnerability targeted node attack alterations regional...
Abstract Objective: Early replacement of a new central venous catheter (CVC) may pose risk persistent or recurrent infection in patients with catheter-related bloodstream (CRBSI). We evaluated the clinical impact early CVC reinsertion after removal CRBSIs. Methods: conducted retrospective chart review adult confirmed CRBSIs 2 tertiary-care hospitals over 7-year period. Results: To treat their infections, 316 underwent removal. Among them, 130 (41.1%) (≤3 days removal), 39 (12.4%) delayed...
Hemiparetic stroke is a common motor network disorder that affects wide range of functional movements due to cortical and subcortical lesions in patients.Conventional magnetic resonance imaging (MRI) has been used examine structural brain damage, but the integrity connectivity whole are poorly understood.Hence, advanced neuroimaging with diffusion tensor (DTI) developed better localize fiber architecture or pathways responsible for impairments hemiparetic stroke.To ascertain between involved...
Abstract The acute stress response is a natural and fundamental reaction that balances the physiological conditions of brain. To maintain homeostasis in brain, based on changes over time hormones neurotransmitters, which are related to resilience can adapt successfully stress. This increases need for dynamic analysis time, new approaches examine relationship between metabolites have emerged. study investigates whether constructed metabolic network realistic or random affected by While...
An acute stress response is a complex process that activates the neuroendocrine and metabolic systems for homeostasis. A study on important to understand how an organism adapts survival. However, most studies have focused chronic stress, there are few stress. They analyzed alterations in brain at particular time after This explored temporal variations of metabolites hippocampus restraint using proton magnetic resonance spectroscopy. All mice group were physically restrained two hours 50 mL...
The acute stress response affects brain metabolites closely linked to the tricarboxylic acid (TCA) cycle. This involves time-dependent changes in hormones and neurotransmitters, which contribute resilience ability adapt while maintaining homeostasis. physiological mechanism of metabolic dynamics, combined with time-series analysis, has prompted development new methods observe relationship between TCA cycle-related metabolites. study aimed through interactions using proton magnetic resonance...
A wavelet electrocardiogram (ECG) signal encoder/decoder (codec) based on the set partitioning in hierarchical trees (SPIHT) compression algorithm is proposed. Experiments selected records from MIT-BIH arrhythmia database reveal that proposed codec significantly more efficient and computation than previously ECG schemes. The coder also attains exact bit rate control generates a stream progressive quality or rate.
The patients undergoing orthopedic surgery may have many risk factors of Clostridium difficile infection (CDI), including increased age, multiple underlying comorbidities, the use perioperative antibiotics, and prolonged length stay. aim this study was to identify prevalence, factor, outcome postoperative CDI in who underwent surgery. We performed a retrospective cohort all aged ≥18 years from January 2016 through December 2017 tertiary care hospital Seoul, South Korea. During period, 7,369...
Structural brain networks can be constructed from the white matter fiber tractography of diffusion tensor imaging (DTI), and structural characteristics analyzed its networks. When are by parcellation method, their network structures change according to scale selection arbitrary thresholding. To overcome these issues, we modified Ɛ -neighbor construction method proposed Chung et al. (2011). The purpose this study was construct for 14 control subjects 16 with autism using both Ɛ-neighbor...
The present study aims to develop a deep learning (DL) model quantify metabolites. To apply DL metabolite quantification using ¹H-MRS data, Convolutional autoencoder (CAE) were designed extract line‐narrowed, baseline‐removed, and noise-free spectra for each metabolite. Fifty thousand simulation data generated by varying the SNR (4-12), linewidth (6-22 Hz), phase shift (± 5°), frequency 5 Hz) on phantom spectra. divided into 45,000 training 5,000 test mean absolute percent errors (MAPEs)...
폐쇄성 수면 무호흡 증후군은 중 부분적인 혹은 완전한 상기도 폐쇄로 인한 호흡 장애 질환이다. 본 연구에서는 증후군 환자와 정상인에서의 호흡하는 동안의 움직임 변화를 분석하기 위하여 광류 방법을 사용하였다. 정상인 6명과 환자 5명에 대해, 기도 면적 분석 방법과 적용하여 흡기와 호기에서의 차이의 절대 값을 비교하였다. 통계적 결과, 기도면적 방법은 각각 유의수준 10%(p값 0.0977)와 1%(p값 0.0011)에서 유의한 결과를 얻었다. 따라서 이용함으로써 기존의 연구에서 환자의 진단에 있어 더 정확한 정보를 얻는데 도움이 될 것으로 기대된다.
Background: As nocardiosis presents with nonspecific symptoms, its diagnosis is often difficult, resulting in high mortality. Here, we report a rare case of disseminated Nocardia farcinica infection that was successfully managed combination antibiotic therapies. Case report: A 71-year-old man idiopathic thrombocytopenia purpura presented sudden-onset motor aphasia, weakness the right limb, and fever. Brain magnetic resonance imaging revealed multiple scattered diffusion-restricted lesions....
X선이 객체를 투과할 때 산란 방사선이 발생한다. 이를 방지하기 위하여 방지 그리드를 사용하는데, 이때 투영 방사선 영상에 그리드 영상이 중첩되어 나타난다. 이러한 출력되면 무아레 무늬가 나타나 해부학적 정보를 가리게 된다. 그리드에 의한 잡음을 제거하기 현재까지 수행된 연구에서는 1차원 주파수 영역에서 그리드의 주파수를 계산하거나 2차원 웨이블릿 변환 및 푸리에 변환을 사용하여 잡음의 제거하였다. 방법들은 잡음뿐만 아니라 영상에서의 진단 정보도 함께 제거하였다.BR 본 패킷과 방법을 조합하여 CR 영상에서 제거하는 제안하였다. 제안한 팬텀영상에 적용한 결과 신호 대 잡음 비율이 기존 방법에 비하여 5.2 - 7.4 dB 향상 되었으며, 실제 CR영상에 대역을 효과적으로 제거하고 나머지 보호함으로써 영상 정보의 손실을 최소화한 결과를 얻을 수 있었다.
Abstract The aim of this study was to determine which antibiotic combinations are appropriate for culture-negative hematogenous vertebral osteomyelitis (HVO), based on the antibiotic-susceptibility pattern organisms isolated from cases culture-proven HVO. We conducted a retrospective chart review adult patients with microbiologically proven HVO in five tertiary-care hospitals over 7-year period. appropriateness empiric regimens assessed susceptibility profiles bacteria. In total, 358 were...