A5006166728- Acute Ischemic Stroke Management
- Cerebrovascular and Carotid Artery Diseases
- Traumatic Brain Injury and Neurovascular Disturbances
- Intracranial Aneurysms: Treatment and Complications
- Advanced MRI Techniques and Applications
- Venous Thromboembolism Diagnosis and Management
- MRI in cancer diagnosis
- Vascular Malformations Diagnosis and Treatment
- Glioma Diagnosis and Treatment
- Stroke Rehabilitation and Recovery
- Sarcoma Diagnosis and Treatment
- Intracerebral and Subarachnoid Hemorrhage Research
- Bone Tumor Diagnosis and Treatments
- Advanced Neuroimaging Techniques and Applications
- Neurosurgical Procedures and Complications
- Cerebral Venous Sinus Thrombosis
- Photoacoustic and Ultrasonic Imaging
- Brain Tumor Detection and Classification
- Craniofacial Disorders and Treatments
- Advanced X-ray and CT Imaging
- Soft tissue tumor case studies
- Brain Metastases and Treatment
- Moyamoya disease diagnosis and treatment
- Ear and Head Tumors
- Cleft Lip and Palate Research
Konkuk University Medical Center
2016-2025
Konkuk University
2012-2025
Korea University
2008-2025
Sungkyunkwan University
2001-2018
Samsung Medical Center
2001-2018
Jeonbuk National University
2009-2018
Severance Hospital
2018
Yonsei University
2018
Gangnam Severance Hospital
2018
University Radiology
2013
Background and Purpose— Effective rescue treatment has not yet been suggested in patients with mechanical thrombectomy (MT) failure. This study aimed to test whether stenting (RS) improved clinical outcomes MT-failed patients. Methods— is a retrospective analysis of the cohorts 16 comprehensive stroke centers between September 2010 December 2015. We identified who underwent MT but failed recanalize intracranial internal carotid artery or middle cerebral M1 occlusion. Patients were...
Background and Purpose— Stent retriever (SR) thrombectomy has become the mainstay of treatment acute intracranial large artery occlusion. However, it is still not much known about optimal limit SR attempts for favorable outcome. We evaluated whether a specific number passes futile recanalization can be determined. Methods— Patients who were treated with as first endovascular modality their occlusion in anterior circulation retrospectively reviewed. The rate each pass was calculated....
To document the signal characteristics of intracerebral hemorrhage (ICH) at evolving stages on diffusion-weighted images (DWI) by comparison with conventional MR images.In our retrospective study, 38 patients ICH underwent a set imaging sequences that included DWI, T1-and T2-weighted imaging, and fluid-attenuated inversion recovery (FLAIR). In 33 10 patients, respectively, echo-planar T2* gradient-echo were also obtained. According to time interval between symptom onset initial MRI, five...
Background and Purpose— Based on its mechanism, the use of balloon guide catheters (BGCs) may be beneficial during endovascular treatment, regardless type mechanical recanalization modality used—stent retriever thrombectomy or thrombaspiration. We evaluated whether BGCs can first-line used. Methods— retrospectively reviewed consecutive acute stroke patients who underwent stent thrombaspiration from prospectively maintained registries 17 centers nationwide. Patients were assigned to BGC...
Objective To characterise the time window in which endovascular thrombectomy (EVT) is associated with good outcome, and to test differential relationship between functional outcome onset-to-reperfusion (ORT), depending on collateral status. Methods This was a retrospective analysis of clinical imaging data 554 consecutive patients, who had recanalisation success by EVT for anterior circulation large artery occlusion, from prospectively maintained registries 16 comprehensive stroke centres...
During the COVID-19 pandemic, decreased volumes of stroke admissions and mechanical thrombectomy were reported. The study's objective was to examine whether subarachnoid haemorrhage (SAH) hospitalisations ruptured aneurysm coiling interventions demonstrated similar declines.We conducted a cross-sectional, retrospective, observational study across 6 continents, 37 countries 140 comprehensive centres. Patients with diagnosis SAH, aneurysmal identified by prospective databases or International...
<b>BACKGROUND AND PURPOSE:</b> There have been inconsistencies on the prognosis and controversies as to proper management of acute basilar artery dissection. The aim this study was evaluate dissection its outcome after management. <b>MATERIALS METHODS:</b> A total 21 patients (mean age, 53 years; range, 24–78 years) with were identified between January 2001 October 2007. Clinical presentation, management, outcomes retrospectively evaluated. <b>RESULTS:</b> presented subarachnoid hemorrhage...
PURPOSE: To retrospectively evaluate the apparent diffusion coefficient (ADC) on magnetic resonance (MR) images and perfusion parameters of lesions that show brain swelling without concomitant parenchymal hypoattenuation computed tomographic (CT) scans. MATERIALS AND METHODS: Review board approval was obtained, informed consent waived. A total 14 patients (seven men seven women; mean age, 64 years ± 11) were selected from consecutive 172 with acute cerebral ischemia who underwent CT within 6...
The role of the balloon guide catheter (BGC) has not been evaluated in contact aspiration thrombectomy (CAT) for acute stroke. Here, authors aimed to test whether BGC was associated with recanalization success and good functional outcome CAT.
Abstract Ovarian cancer is the most lethal form of gynecological cancer. Approximately 75% patients are diagnosed at stage 3 or 4, where has a high metastasis and mortality rate. Platinum chemotherapy standard first line treatment for ovarian However, 60% with advanced disease experience drug resistance side effects, recurrence occurring within few years. Resultantly, five year survival rate only 20-30%. Among mechanisms proposed to explain platinum resistance, tumor hypoxia known contribute...
OBJECTIVE Thromboembolism is one of the most common and serious complications associated with endovascular embolization intracranial aneurysms. We report our clinical experiences intra-arterial tirofiban infusion during aneurysm embolization. METHODS The clinical, radiological, laboratory data 24 patients harboring 25 aneurysms (25 procedures) who underwent for thromboembolism treatment were reviewed retrospectively. Thrombi or emboli resolved by superselective via a microcatheter. RESULTS...
The gyrus rectus (GR) is known as a non-functional gyrus; hence, its resection agreed to be safe procedure frequently practiced achieve better surgical view during specific surgeries. This study aimed at comparing the cognitive outcomes following GR in patients who underwent surgery for ruptured anterior communicating artery (ACoA) aneurysms.From 2012 2015, 39 clipping ACoA aneurysms. Mini-mental state examinations (MMSE) were performed 2 different periods. statistical relationship between...
Abstract Objectives This study evaluated the collateral map’s ability to predict lesion growth and penumbra after acute anterior circulation ischemic strokes. Methods was a retrospective analysis of selected data from prospectively collected database. The ratio follow-up volume baseline on diffusion-weighted imaging (DWI). time-to-maximum (Tmax)/DWI Tmax > 6 s volume. hypoperfused phase_FU (phase with lesions most approximate DWI lesion) phase_baseline map. Multiple logistic regression...
To validate the clinical feasibility of deep learning-driven magnetic resonance angiography (DL-driven MRA) collateral map in acute ischemic stroke. We employed a 3D multitask regression and ordinal neural network, called as 3D-MROD-Net, to generate DL-driven MRA maps. Two raters graded perfusion scores both conventional maps measured grading time. They also qualitatively assessed image quality Interrater inter-method agreements for between two were analyzed, along with comparison time...
To determine the utility of perfusion MR imaging in differential diagnosis brain tumors.Fifty-seven patients with pathologically proven tumors (21 high-grade gliomas, 8 low-grade lymphomas, 6 hemangioblastomas, 7 metastases, and various other tumors) were included this study. Relative cerebral blood volume (rCBV) time-to-peak (TTP) ratios quantitatively analyzed rCBV grade each tumor was also visually assessed on an map.The highest seen followed by lymphomas. There no significant difference...
OBJECTIVE HydroCoil (MicroVention, Aliso Viejo, CA), a hydrogel-platinum coil hybrid device, is one of various efforts to overcome delayed recanalization coiled intracranial aneurysms. The purpose this study was investigate the outcome aneurysms treated with HydroCoils. METHODS This multicenter prospective included 80 in 76 patients There were 32 (40%) ruptured and 48 (60%) unruptured aneurysms; 22 (28%) large (maximal diameter, ≥10 mm) 58 (72%) small. Aneurysm volumes 100 mm3 or more less...
Background Collateral circulation determines tissue fate and affects treatment result in acute ischemic stroke. A precise method for collateral estimation an optimal imaging protocol is necessary to make appropriate decision Purpose To verify the value of multiphase data sets (MR angiography map) derived from dynamic contrast material–enhanced MR predicting functional outcomes after Materials Methods This secondary analysis ongoing prospective observational study included participants with...
Abstract To determine the value of susceptibility-weighted imaging (SWI) for collateral estimation and predicting functional outcomes after acute ischemic stroke. identify independent predictors favorable outcomes, age, sex, risk factors, baseline National Institutes Health Stroke Scale (NIHSS) score, diffusion-weighted (DWI) lesion volume, site steno-occlusion, SWI grade, mode treatment, successful reperfusion were evaluated by multiple logistic regression analyses. A total 152 participants...
Assessment of the collateral status has been emphasized for appropriate treatment decisions in patients with acute ischemic stroke. The purpose this study was to introduce a multiphase MRA imaging method (collateral map) derived from time-resolved dynamic contrast-enhanced and verify value map stroke by comparing it (MRP susceptibility MR perfusion. From prospectively maintained registry stroke, data caused steno-occlusive lesions unilateral ICA and/or M1 segment MCA were analyzed. We...
Abstract BACKGROUND It remains controversial whether carotid artery stenting (CAS) is needed in cases of tandem cervical internal occlusion (cICAO) and intracranial large vessel (LVO). OBJECTIVE To investigate the efficacy safety CAS combination with endovascular thrombectomy (CAS-EVT) cICAO-LVO patients to compare its outcomes those EVT without (EVT-alone). METHODS We identified all who underwent for from prospectively maintained registries 17 stroke centers. Patients were classified into 2...
H rate (7)(8)(9)(10)(11).To the best of our knowledge, there have been no prospective studies that compared Angio-Seal and Closer S devices.This trial is first study to compare efficacy, device failure rates complication two devices during both angiographic interventional procedures.