A5020302307- Spine and Intervertebral Disc Pathology
- Shoulder Injury and Treatment
- Spinal Fractures and Fixation Techniques
- Bone Tumor Diagnosis and Treatments
- Sarcoma Diagnosis and Treatment
- Anesthesia and Pain Management
- Shoulder and Clavicle Injuries
- Orthopedic Surgery and Rehabilitation
- Total Knee Arthroplasty Outcomes
- Cervical and Thoracic Myelopathy
- Bone and Joint Diseases
- Knee injuries and reconstruction techniques
- Spinal Hematomas and Complications
- Oral and Maxillofacial Pathology
- Hip disorders and treatments
- Stability and Control of Uncertain Systems
- Pelvic and Acetabular Injuries
- Sports injuries and prevention
- Musculoskeletal pain and rehabilitation
- Advanced Neuroimaging Techniques and Applications
- Orthopaedic implants and arthroplasty
- Spondyloarthritis Studies and Treatments
- Neurosurgical Procedures and Complications
- Musculoskeletal synovial abnormalities and treatments
- Lymphatic System and Diseases
Seoul National University Bundang Hospital
2016-2025
Union Hospital
2025
Huazhong University of Science and Technology
2025
University of Science and Technology of China
2009-2024
Peking University People's Hospital
2021
Peking University
2021
Zhengzhou City Hospital
2021
Seoul National University
1994-2017
Chinese Academy of Sciences
2006-2017
Seoul National University Hospital
2014-2015
Purpose To explore the role of histogram analysis apparent diffusion coefficient (ADC) maps based on entire tumor volume data in determining glioma grade and to evaluate diagnostic performance ADC at standard (1000 sec/mm2) high (3000 b values. Materials Methods This retrospective study was approved by institutional review board, informed consent waived. Twenty-seven patients with astrocytic tumors underwent diffusion-weighted magnetic resonance imaging values 1000 3000 sec/mm2,...
OBJECTIVE. The purpose of this study was to propose a new MRI grading system for cervical canal stenosis and evaluate the reproducibility system. MATERIALS AND METHODS. Cervical classified according T2-weighted sagittal images into following grades: grade 0, absence stenosis; 1, subarachnoid space obliteration exceeding 50%; 2, spinal cord deformity; 3, signal change. scans 82 patients (37 men 45 women; mean age, 65.2 years; range, 60–86 years) were independently analyzed by six...
To evaluate the enhancement patterns of intrahepatic mass-forming cholangiocarcinomas (IMCCs) with emphasis on hepatobiliary phase (HBP) gadoxetic acid-enhanced magnetic resonance (MR) imaging.This retrospective study was institutional review board approved, and requirement for informed consent waived. Fifty patients (41 men, nine women; mean age, 62.3 years; range, 44-76 years) IMCC underwent unenhanced T1- T2-weighted MR imaging including dynamic between May 2008 December 2010. Signal...
Objective:The purpose of this study was to evaluate the reliability a new magnetic resonance imaging (MRI) grading system for cervical neural foraminal stenosis (NFS).Materials and Methods: Cervical NFS at bilateral C4/5, C5/6, C6/7 classified into following three grades based on T2-weighted axial images: Grade 0 = absence NFS, with narrowest width foramen greater than extraforaminal nerve root (EFNR); 1 same or less (but more 50% of) EFNR; 2 EFNR.The MRIs 96 patients who were over 60 years...
The purpose of this study was to identify the MRI features that aid in differentiation between infectious sacroiliitis and unilateral associated with spondyloarthritis.The MR images 54 patients who received a diagnosis August 2001 2013 were reviewed. evaluated for bone lesions (extent distribution marrow edema presence size erosions), soft-tissue (capsulitis, extracapsular fluid collections, periarticular muscle edema), joint space enhancement. Fisher exact test used comparison categoric...
Performance of a Deep Learning Algorithm in Detecting Osteonecrosis the Femoral Head on Digital Radiography: A Comparison With Assessments by RadiologistsChoong Guen Chee1,2, Youngjune Kim1, Yusuhn Kang1, Kyong Joon Lee1, Hee-Dong Chae3, Jungheum Cho1, Chang-Mo Nam1, Dongjun Choi1, Eugene Woo Sung Hwan Hong3, Joong Mo Ahn1 and Heung Sik Kang1Audio Available | Share
In this paper, robust control with delayed measurements is investigated for remote motion/force of robotic manipulators random time delays. Both sensor-to-controller and controller-to-actuator random-network-induced delays are considered in the networked control. These modeled as Markov processes. Based on stochastic Lyapunov method, sufficient conditions boundedness probability system solutions given. It proven that all signals manipulator bounded probability. Finally, extensive simulations...
Metal Artifact Reduction for Orthopedic Implants (O-MAR): Usefulness in CT Evaluation of Reverse Total Shoulder ArthroplastyEuddeum Shim1,2, Yusuhn Kang1, Joong Mo Ahn1, Eugene Lee1, Joon Woo Joo Han Oh3 and Heung Sik Kang1Audio Available | Share
Spontaneous ruptures of flexor tendons in children without a clear cause are rare. We describe the case 19-month-old girl with history multiple spontaneous both hands. Level evidence: V
The purpose of this study is to describe MRI findings muscle involvement in patients with polyarteritis nodosa (PAN), an emphasis on the contrast enhancement characteristics.MRI studies eight PAN were retrospectively reviewed (four male and four female patients; mean age at presentation, 34.3 years; range, 7-64 years). MR images evaluated focusing following features: affected structures (muscle, fascia, or periosteum), lesion signal intensity characteristics T1-and T2-weighted images,...
The purpose of this study was to evaluate serial changes in sonographic findings a rotator cuff tendon after repair.Sixty-five arthroscopically repaired tears (43 full-thickness and 22 partial-thickness tears) were retrospectively included study. Serial examinations performed at 5 weeks, 3 months, 6 months surgery. the assessed for recurrent tear, thickness, morphologic characteristics, vascularity, bursitis each time point.Four occurred within postoperative thickness decreased from weeks...
Abstract Quantitative bone SPECT/CT (single-photon emission computed tomography/computed tomography) using Tc-99m hydroxymethylene diphosphonate is emerging as a useful imaging modality for skeletal diseases. Accessory navicular (ANB) has been evaluated by scintigraphy only qualitatively and semiquantitatively. However, truly objective quantitative assessment of ANB lacking. Here, we measured the maximum standardized uptake value (SUVmax) investigated its usefulness an biomarker ANB....
PURPOSE: To determine the sensitivity of magnetic resonance (MR) imaging for preoperative localization abnormal parathyroid glands in mediastinum and to compare MR with those scintigraphy ultrasonography (US). MATERIALS AND METHODS: The prospective was compared thallium-technetium US 25 patients whom gland located at surgery. RESULTS: had a much higher (22 cases [88%]) than did (11 19 [58%]) or (three 24 [12%]). most common locations mediastinal were intrathymic (eight cases) paraesophageal...
This paper describes the synthesis of robust output feedback H ∞ control for a class uncertain Markovian jump linear systems with time-delays which are time-varying and depend on system modes operation. Under assumption known bounds uncertainties gain variations, we present sufficient conditions existence stochastic stability γ-disturbance attenuation. Through changes variables Schur complements, these can be rewritten in set coupled matrix inequalities, which, easily constructed. As an...
<h3>BACKGROUND AND PURPOSE:</h3> Longitudinally extensive transverse myelitis is a well-documented spinal manifestation of neuromyelitis optica spectrum disorders, however, other forms nontumorous myelopathy can also manifest as longitudinally myelitis. Our aim was to evaluate the MR imaging features aquaporin-4 antibody–positive myelitis, which strongly associated with disorders. <h3>MATERIALS METHODS:</h3> We evaluated cervicomedullary junction involvement, cord expansion ratios, bright...