A5090876880- Cardiac Imaging and Diagnostics
- Advanced X-ray and CT Imaging
- Radiation Dose and Imaging
- Advanced MRI Techniques and Applications
- Medical Imaging Techniques and Applications
- MRI in cancer diagnosis
- Hepatocellular Carcinoma Treatment and Prognosis
- Medical Imaging and Pathology Studies
- Coronary Interventions and Diagnostics
- Lung Cancer Diagnosis and Treatment
- Liver Disease Diagnosis and Treatment
- Radiomics and Machine Learning in Medical Imaging
- Aortic aneurysm repair treatments
- Cerebrovascular and Carotid Artery Diseases
- Cardiac Arrhythmias and Treatments
- Cardiovascular Function and Risk Factors
- Aortic Disease and Treatment Approaches
- Radiology practices and education
- Pulmonary Hypertension Research and Treatments
- Cardiovascular Disease and Adiposity
- Infectious Aortic and Vascular Conditions
- Renal and Vascular Pathologies
- Vascular Procedures and Complications
- Peripheral Artery Disease Management
- Cardiovascular Effects of Exercise
Keio University
2009-2021
RELX Group (United States)
2018
Keio University Hospital
2004-2018
London Borough of Camden
2018
Johns Hopkins University
2015-2017
Johns Hopkins Hospital
2017
National Heart Lung and Blood Institute
2015-2017
National Institutes of Health
2015-2017
Universidade de São Paulo
2017
Imaging Center
2016
To compare image quality obtained in phantoms with virtual monochromatic spectral (VMS) imaging that conventional 120-kVp computed tomography (CT) for a given radiation dose.Three syringes were filled diluted contrast medium (each syringe contained different iodine concentration [5, 10, or 15 mg of per milliliter]), and fourth was water. These placed torso phantom meant to simulate the standard human physique. The examined CT system use fast kilovoltage switching (80 140 kVp) (120 modes....
Abstract Aims To evaluate the diagnostic power of integrating results computed tomography angiography (CTA) and CT myocardial perfusion (CTP) to identify coronary artery disease (CAD) defined as a flow limiting stenosis causing defect by single photon emission (SPECT). Methods We conducted multicentre study accuracy integrated CTA–CTP for identification patients with flow-limiting CAD ≥50% invasive (ICA) corresponding deficit on stress (SPECT/MPI). Sixteen centres enroled 381 who underwent...
To evaluate the clinical value of diffusion-weighted imaging (DWI) and dynamic MRI in combination with T2-weighted (T2W) for detection prostate cancer.A total 83 patients elevated serum specific antigen (PSA) levels (>4.0 ng/mL) were evaluated by T2W, DWI, at 1.5 T prior to needle biopsy. The data from results T2W alone (protocol A), DWI B), T2W+DWI C) entered into a receiver operating characteristic (ROC) curve analysis, under systemic biopsy as standard reference.Prostate cancer was...
The aim of this study was to assess the effectiveness a model-based iterative reconstruction (MBIR) in improving image quality and diagnostic performance ultralow-dose computed tomography (ULDCT) lung.The institutional review board approved study, all patients provided written informed consent. Fifty-two underwent low-dose (LDCT) (screening-dose, 50 mAs) ULDCT (4 lung simultaneously. LDCT images were reconstructed with filtered back projection (LDCT-FBP images) both MBIR (ULDCT-MBIR FBP...
Purpose To compare the prognostic importance (time to major adverse cardiovascular event [MACE]) of combined computed tomography (CT) angiography and CT myocardial stress perfusion imaging with that invasive coronary (ICA) single photon emission imaging. Materials Methods This study was approved by all institutional review boards, written informed consent obtained. Between November 2009 July 2011, 381 participants clinically referred for ICA aged 45–85 years were enrolled in Combined...
Background: The relationship between the epicardial fat volume measured by 64-slice multidetector computed tomography (MDCT) and extension severity of coronary atherosclerosis was investigated. Methods Results: Both MDCT conventional angiography (CAG) were performed in 71 consecutive patients who presented with effort angina. adipose tissue (EAT) MDCT. assessed evaluating plaques 790 segments using data, percentage diameter stenosis 995 CAG data. estimated EAT indexed body surface area...
Objectives: The purpose of this study was to select the optimal monochromatic level for virtual spectral (VMS) imaging minimize image noise liver parenchyma and acquire a high contrast-to-noise ratio (CNR) hypovascular hepatic metastases in portal-dominant phase. Materials Methods: This conducted with approval our institutional review board, written informed consent obtained from all participating patients. Ninety patients were scanned by fast kilovoltage switching dual-energy computed...
Background— Epicardial fat may play a role in the pathogenesis of coronary artery disease (CAD). We explored relationship epicardial volume (EFV) with presence and severity CAD or myocardial perfusion abnormalities diverse, symptomatic patient population. Methods Results— Patients (n=380) known suspected who underwent 320-detector row computed tomographic angiography, nuclear stress imaging, clinically driven invasive angiography for CORE320 international study were included. EFV was defined...
Abstract Diamond‐like carbon (DLC) is being considered for widespread clinical use as a surface coating cardiovascular devices. We synthesized fluorinated DLC (F‐DLC) coatings in order to create more hydrophobic with improved antithrombogenicity and flexibility when compared conventional by combining the inertness of films advantage fluorination. The purpose this study was evaluate vitro hemocompatibility vivo biocompatibility F‐DLC medical whole blood model confirmed that platelet loss...
Tumor detection is of great clinical interest. It known that solid tumors have unique vascular pathophysiological features summarized under the term "enhanced permeability and retention (EPR) effect", which induces accumulation prolonged macromolecules from blood into tumor. We therefore designed synthesized dextran coated paramagnetic gadolinium phosphate nanoparticles (PGP/dextran) as a new magnetic resonance imaging (MRI) contrast agent. The main this material are: (i) characteristics...
Objectives: To evaluate the diagnostic performance of fast scanning tomosynthesis in comparison with that chest radiography for detection pulmonary nodules, using multidetector-row computed tomography (MDCT) as reference, and to assess association true-positive fraction (TPF) size, CT attenuation value, location nodules. Materials Methods: The institutional review board approved this study, written informed consent was obtained from all patients. Fifty-seven patients 59 without nodules...
To compare the diagnostic performance of 320-detector row computed tomography (CT) coronary angiography-derived fractional flow reserve (FFR; FFRCT), transluminal attenuation gradient (TAG; TAG320), and CT angiography alone to diagnose hemodynamically significant stenosis as determined by invasive FFR.This substudy prospective NXT study (no. NCT01757678) was approved each participating institution's review board, informed consent obtained from all participants. Fifty-one consecutive patients...