A5078556288- Radiomics and Machine Learning in Medical Imaging
- MRI in cancer diagnosis
- Radiation Dose and Imaging
- Advanced X-ray and CT Imaging
- Cardiac Imaging and Diagnostics
- Breast Cancer Treatment Studies
- Breast Lesions and Carcinomas
- Cerebrovascular and Carotid Artery Diseases
- Interstitial Lung Diseases and Idiopathic Pulmonary Fibrosis
- Ultrasound in Clinical Applications
- Hearing, Cochlea, Tinnitus, Genetics
- Sepsis Diagnosis and Treatment
- Spine and Intervertebral Disc Pathology
- Advanced Radiotherapy Techniques
- Advanced MRI Techniques and Applications
- Ultrasound Imaging and Elastography
- Retinal and Optic Conditions
- Biopolymer Synthesis and Applications
- Lung Cancer Diagnosis and Treatment
- Retinal Diseases and Treatments
- Musculoskeletal pain and rehabilitation
- Artificial Intelligence in Healthcare and Education
- Acute Ischemic Stroke Management
- Medical Imaging Techniques and Applications
- Thyroid Cancer Diagnosis and Treatment
Korea University Medical Center
2017-2023
Korea University
2016-2022
Ansan University
2017-2021
National University College
2017
Seoul National University Bundang Hospital
2017
Samsung (United States)
2017
Samsung Medical Center
2017
New Generation University College
2017
Yonsei University Health System
2010
Severance Hospital
2010
Objective: To investigate the value of ultrasound (US) microflow assessment in distinguishing malignant from benign solid breast masses as well association between US parameters and histologic microvessel density (MVD).Materials Methods: Ninety-eight (57 41 malignant) were examined using Superb Microvascular Imaging (SMI) contrast-enhanced (CEUS) before biopsy.Two radiologists evaluated quantitative qualitative vascular on SMI (vascular index, morphology, distribution, penetration) CEUS...
BACKGROUND CONTEXTLaminoplasty of the cervical spine is widely used as an effective surgical method to treat compressive myelopathy spine; however, there adverse effect kyphosis after surgery. The risk factors or predictors have not been sufficiently evaluated.PURPOSETo assess for following laminoplasty.STUDY DESIGNRetrospective study.PATIENT SAMPLEPatients diagnosed with spondylotic (CSM) ossification posterior longitudinal ligament (OPLL) who underwent laminoplasty between May 2011 and...
Abstract Background Shear wave elastography (SWE) is an ultrasound technique for the noninvasive quantification of tissue stiffness. The hypoxic tumor microenvironment promotes stiffness and associated with poor prognosis in cancer. We aimed to investigate correlation between hypoxia histologic biomarkers measured by SWE breast Methods From June 2016 January 2018, 82 women invasive cancer who underwent before treatment were enrolled. Average elasticity (E average ) tumor-to-fat ratio...
Objective The aim of this study was to develop a predictive model objective oropharyngeal obstructive sleep apnea (OSA) surgery outcomes including success rate and apnea-hypopnea index (AHI) reduction ratio in adult OSA patients. Study design Retrospective outcome research. Methods All subjects with who underwent and/or nasal were followed for at least 3 months enrolled study. Demographic, anatomical [tonsil size (TS) palate-tongue position (PTP) grade (Gr)], polysomnographic parameters...
Purpose: The aim of this study was to evaluate the diagnostic performance modified Korean Thyroid Imaging Reporting and Data System (K-TIRADS) compared with five society risk stratification systems (RSSs) according nodule size.Methods: In total, 3,826 consecutive thyroid nodules (≥1 cm) final diagnoses in 3,088 patients were classified RSSs. K-TIRADS by raising biopsy size threshold for low-suspicion subcategorizing intermediate-suspicion nodules. We assessed RSSs as triage tests their...
<h3>Objective:</h3> To investigate the role of left ventricular wall motion abnormalities (LVWMA), unrelated to high-risk cardioembolic conditions, in stroke recurrence. <h3>Methods:</h3> This study included consecutive acute ischemic patients. Transthoracic echocardiography was performed as a routine evaluation for The outcomes were time recurrent any and stroke. <h3>Results:</h3> Among 4,316 patients, 430 had LVWMA without sources. median observation periods patients at risk 24.5 24.7...
Abstract We aimed to evaluate the relationship between capillary abnormalities including nonperfusion area (NPA) in optical coherence tomography angiography (OCTA) images and recurrence of macular edema (ME) secondary branch retinal vein occlusion (BRVO) after intravitreal injection anti-vascular endothelial growth factor (anti-VEGF; bevacizumab). The records 40 patients who underwent bevacizumab for ME BRVO had at least six months follow-up were reviewed. Central thickness (CRT; μm) type...
Abstract We investigated association between epidemiological and clinical characteristics of coronavirus disease 2019 (COVID-19) patients outcomes in Korea. This nationwide retrospective cohort study included 5621 discharged with COVID-19, extracted from the Korea Disease Control Prevention Agency (KDCA) database. compared data survivors (n = 5387) non-survivors 234). used logistic regression analysis Cox proportional hazards model to explore risk factors death fatal adverse outcomes....
Abstract Our aim was to correlate chest CT and pathologic findings of polyhexamethylene guanidine phosphate (PHMG)-induced lung injuries in a rat model, determine whether PHMG exposure causes tumors, explore genetic alterations according under the guidance CT. A solution intratracheally administrated 40 male rats. Chest carried out all rats both lungs were collected for histopathologic evaluation. At 4- 8-weeks post-instillation, one lobe right from 3 subjected RNA sequencing. least abnormal...
To evaluate the relationship between ulnar nerve instability and snapping of triceps medial head during elbow flexion.Twenty-six healthy individuals were recruited. The primary outcome measures ultrasonographic electrophysiological parameters nerve. Ulnar was classified into three types based on degree movement: no dislocation (Type N), subluxation S), D).In 90-degree position, incidences Type N, S, D 41 (78.8%), 8 (15.4%), 3 (5.8%) elbows, respectively; in full flexion Types 24 (46.2%), 19...
To identify risk factors of recurrence macular oedema in branch retinal vein occlusion (BRVO) after intravitreal bevacizumab (IVB) injection.The records 63 patients who underwent IVB injection for secondary to BRVO with at least 6 months follow-up were reviewed. Patients evaluated baseline fluorescein angiography (FA), optical coherence tomography (OCT) and ultra-wide-field fundus photography (WFP). During follow-up, OCT WFP repeated. The area haemorrhage, central thickness (CRT), (mm2)...
Quality of life (QoL) has become a major concern as the survival time breast cancer increases. We investigated changes in QoL through comprehensive categorical analysis, for first three years after treatment including radiotherapy. A total 1156 patients were enrolled from 17 institutions. All survivors grouped according to surveillance period 9–15 months (first year), 21–27 (second and 33–39 (third year) end The 5-dimensional questionnaire by EuroQol group (EQ-5D) EORTC Life Questionnaire;...
Background Radiogenomic investigations for breast cancer provide an understanding of tumor heterogeneity and discover image phenotypes genetic variation. However, there is little research on the correlations between US features whole-transcriptome profiling. Purpose To explore reflecting alteration relevant to treatment prognosis by comparing images with their RNA sequencing results. Materials Methods From January October 2016, B-mode vascular in 31 women (mean age, 49 years ± 9 [standard...
The purpose of this study is to determine the optimal energy level virtual monochromatic images from spectral CT compared with conventional polychromatic for reducing beam-hardening artifacts caused by contrast media in thorax.A total 101 consecutive patients who underwent chest enhancement were retrospectively included study. same and injection protocols applied whole population. Virtual image datasets ranging 70 200 keV obtained. Readers' subjective quality scores recorded obtained at 70,...
This prospective study enrolled 147 women with invasive breast cancer who underwent low-dose CT (80 kVp, 25 mAs, 1.01–1.38 mSv) before treatment. From each tumor, we extracted eight perfusion parameters using the maximum slope algorithm and 36 texture filtered histogram technique. Relationships between histological factors were analyzed five machine learning algorithms. Performance was compared area under receiver-operating characteristic curve (AUC) DeLong test. The AUCs of models increased...
Objective: To evaluate the accuracy of emphysema volume (EV) and airway measurements (AMs) produced by various iterative reconstruction (IR) algorithms virtual monoenergetic images (VME) at both low-and standard-dose settings.Materials Methods: Computed tomography (CT) were obtained on phantom low-(30 mAs 120 kVp) standard-doses (100 kVp).Each CT scan was reconstructed using filtered back projection, hybrid IR (iDose 4 ; Philips Healthcare), model-based (IMR-R1, IMR-ST1, IMR-SP1; VME 70 keV...
Objectives The aim of this study was to investigate the feasibility using low-dose perfusion computed tomography (CT) in breast cancers for quantification tumor vascularity and correlate indexes with prognostic biomarkers. Materials Methods This preliminary approved by our institutional review board. Signed informed consent obtained from all 70 enrolled patients invasive cancers. Low-dose CT performed patient prone position a spectral device set at 80 kVp 30 mAs (1.30–1.40 mSv). Images were...
There have been no studies on the effects of polyhexamethylene guanidine phosphate (PHMG) after a long period exposure in rodent model. We aimed to evaluate long-term lung damage PHMG using conventional chest computed tomography (CT) and histopathologic analysis rat A solution was intratracheally administrated 24 male rats. At 8, 26, 52 weeks instillation, CT performed all rats both lungs were extracted for evaluation. four carcinomas had developed three eight (37.5%). Bronchiolo-alveolar...
<h3>BACKGROUND:</h3> The use of high-flow nasal cannula (HFNC) is rapidly increasing without clear indications, creating the potential for overuse or misuse and accompanying risk adverse events. purpose this study was to determine factors associated with HFNC failure by examining current clinical practice HFNC. <h3>METHODS:</h3> From July 1, 2017, June 30, 2018, in 5 university-affiliated hospitals Republic Korea, a total 1,161 admitted adult subjects who had administered were...