A5071391245- Advanced MRI Techniques and Applications
- Advanced Neuroimaging Techniques and Applications
- MRI in cancer diagnosis
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Radiomics and Machine Learning in Medical Imaging
- Cardiac Imaging and Diagnostics
- Shoulder Injury and Treatment
- Bone and Joint Diseases
- Medical Imaging and Analysis
- NMR spectroscopy and applications
- Liver Disease Diagnosis and Treatment
- Peripheral Nerve Disorders
- Osteoarthritis Treatment and Mechanisms
- Cardiac Arrhythmias and Treatments
- Cardiac Valve Diseases and Treatments
- Medical Image Segmentation Techniques
- Prostate Cancer Diagnosis and Treatment
- Total Knee Arthroplasty Outcomes
- Cardiac electrophysiology and arrhythmias
- Atrial Fibrillation Management and Outcomes
- Spine and Intervertebral Disc Pathology
- Ultrasound and Hyperthermia Applications
- Lanthanide and Transition Metal Complexes
- Knee injuries and reconstruction techniques
Clinical Solutions
2022-2024
Columbia University Irving Medical Center
2024
General Electric (United States)
2019-2024
Applied Sciences Laboratory (United States)
2008-2023
Memorial Sloan Kettering Cancer Center
2017-2020
Graz University of Technology
2020
GE Global Research (United States)
2008-2019
Icahn School of Medicine at Mount Sinai
2016-2017
NYU Langone Health
2017
Mayo Clinic
2016
Purpose To assess the determinants of technical failure magnetic resonance (MR) elastography liver in a large single-center study. Materials and Methods This retrospective study was approved by institutional review board. Seven hundred eighty-one MR examinations performed 691 consecutive patients (mean age, 58 years; male patients, 434 [62.8%]) single center between June 2013 August 2014 were retrospectively evaluated. at 3.0 T (n = 443) or 1.5 338) using gradient-recalled-echo pulse...
To assess interplatform reproducibility of liver stiffness (LS) and spleen (SS) measured with magnetic resonance elastography (MRE) based on a 2D gradient echo (GRE) sequence.This prospective Health Insurance Portability Accountability Act (HIPAA)-compliant Institutional Review Board (IRB)-approved study involved 12 subjects (five healthy volunteers seven patients disease). A multislice 2D-GRE-based MRE sequence was performed using two systems from different vendors (3.0T GE 1.5T Siemens)...
Objective The aim of this study was to compare 2-dimensional (2D) gradient recalled echo (GRE) and 2D spin echoplanar imaging (SE-EPI) magnetic resonance elastography (MRE) sequences the liver in terms image quality quantitative stiffness (LS) measurement. Materials Methods This prospective involved 50 consecutive subjects (male/female, 33/17; mean age, 58 years) who underwent at 3.0 T including 2 MRE sequences, GRE, SE-EPI (acquisition time 56 vs 16 seconds, respectively). Image scores were...
Abstract Background Ultrafast dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI)-derived kinetic parameters have demonstrated at least equivalent accuracy to standard DCE-MRI in differentiating malignant from benign breast lesions. However, it is unclear if they any efficacy as prognostic markers. The aim of this study was investigate the relationship between ultrafast DCE-MRI-derived and cancer characteristics. Methods Consecutive MRI examinations February 2017 January 2018 were...
The MRI-compatible electrophysiology system previously used for MR-guided left ventricular electroanatomic mapping was enhanced with improved MR tracking, an MR-compatible radiofrequency ablation and higher-resolution imaging sequences to enable mapping, ablation, monitoring in smaller cardiac structures. MR-tracked navigation performed the atrium (LA) atrioventricular (AV) node, followed by LA of pulmonary veins (PVs) AV node.One 7 PV ablations, 3 mappings, node ablations were conducted....
X-ray fluoroscopy constitutes the fundamental imaging modality for catheter visualization during interventional electrophysiology procedures. The minimal tissue discriminative capability of is mitigated in part by use electroanatomic mapping systems and enhanced integration preacquired 3-dimensional heart with computed tomographic or magnetic resonance (MR) imaging. A more ideal paradigm might be to intraprocedural MR directly image guide procedures.An imaging-based system was designed...
Cancer patients often have a history of chemotherapy, putting them at increased risk liver toxicity and pancytopenia, leading to elevated fat iron respectively. T1-in-and-out-of-phase, the conventional MR technique for assessment, fails detect in presence concomitantly iron. IDEAL-IQ is more recently introduced quantification method that corrects multiple confounding factors, including This retrospective study was approved by institutional review board with waiver informed consent. We...
ABSTRACT BACKGROUND AND PURPOSE Ultrahigh‐field 7T promises more than doubling the signal‐to‐noise ratio (SNR) of 3T for magnetic resonance imaging (MRI), particularly MRI susceptibility effects induced by B 0 . Quantitative mapping (QSM) is based on deconvolving phase (or field) and would therefore benefit substantially from 7T. The purpose this work was to compare QSM performance at versus in an intrascanner test‐retest experiment with varying echo numbers (5 10 echoes). METHODS A...
To investigate the feasibility of accelerating prostate diffusion-weighted imaging (DWI) by reducing number acquired averages and denoising resulting image using a proposed guided convolutional neural network (DnCNN).Raw data from DWI scans were retrospectively gathered between July 2018 2019 six single-vendor MRI scanners. There 103 datasets used for training (median age, 64 years; interquartile range [IQR], 11), 15 validation 68 IQR, 12), 37 testing 12). High b-value (hb DW) reconstructed...
<h3>Importance</h3> After neoadjuvant chemotherapy (NAC), pathologic complete response (pCR) is an optimal outcome and a surrogate end point for improved disease-free overall survival. To date, surgical resection remains the only reliable method diagnosing pCR. <h3>Objective</h3> evaluate accuracy of magnetic resonance imaging (MRI)–guided biopsy pCR after NAC compared with reference-standard resection. <h3>Design, Setting, Participants</h3> Single-arm, phase 1, nonrandomized controlled...
After pulmonary vein isolation for the treatment of atrial fibrillation, clinical arrhythmia recurrence is often a result reconnection. By selectively visualizing scarred tissue, delayed enhancement magnetic resonance imaging may provide noninvasive means to identify gaps in radiofrequency ablation lines. This report correlates three‐dimensional with invasive electroanatomical mapping patient recurrent after multiple unsuccessful ablations fibrillation.
Multishot multiplexed sensitivity-encoding diffusion-weighted imaging is a feasible and easily implementable routine breast MRI protocol that yields high-quality images. Purpose To compare (MUSE) (DWI) single-shot DWI for lesion visibility differentiation of malignant benign lesions within the breast. Materials Methods In this prospective institutional review board–approved study, both MUSE sequences were first optimized in phantoms then performed group patients. Thirty women (mean age, 51.1...
Typical quantitative susceptibility mapping (QSM) reconstruction steps consist of first estimating the magnetization field from gradient-echo images, and then reconstructing map estimated field. The errors field-estimation may propagate into final QSM map, noise in no longer be zero-mean Gaussian noise, thus, causing streaking artifacts resulting QSM. A multiecho complex total inversion (mcTFI) method was developed to compute directly gradient echo images using an improved signal model that...
Purpose To compare the bias and inherent reliability of quantitative (T 1 T 2 ) imaging metrics generated from magnetic resonance fingerprinting (MRF) technique using ISMRM/NIST system phantom in an international multicenter setting. Method MRI provides standard reference relaxation values (vendor‐provided) for each 14 vials arrays. MRF‐SSFP scans repeated over 30 days on GE 1.5 3.0 scanners at three collaborative centers. MRF estimated 1, averaged were compared with vendor‐provided...
The present exploratory study investigates the performance of a new, rapid, synthetic MRI method for diagnostic image quality assessment and measurement relaxometry metric values in head neck (HN) tumors normal-appearing masseter muscle. multi-dynamic multi-echo (MDME) sequence was used data acquisition, followed by reconstruction on 3T scanner 14 patients (3 untreated 11 treated). MDME enables absolute quantification physical tissue properties, including T1 T2, with shorter scan time than...
Accurate morphometric assessment of cartilage-such as thickness/volume-via MRI is essential for monitoring knee osteoarthritis. Segmenting cartilage remains challenging and dependent on extensive expert-annotated datasets, which are heavily subjected to inter-reader variability. Recent advancements in Visual Foundational Models (VFM), especially memory-based approaches, offer opportunities improving generalizability robustness. This study introduces a deep learning (DL) method meniscus...
The purpose of this study is to compare image quality, presence and grade artifacts, signal-to-noise ratio, apparent diffusion coefficient (ADC) values in pancreatic tissue between high-resolution navigator-triggered (NT) restricted field view (rFOV) FOCUS single-shot (SS) echo-planar imaging (EPI) diffusion-weighted (DWI) NT large FOV SS-EPI DWI.Magnetic resonance examinations were performed with GE 3-T systems using a 32-channel body array coil. Seventeen consecutive patients imaged. A...
Evaluation of the 3D bone morphology glenohumeral joint is necessary for pre-surgical planning. Zero echo time (ZTE) magnetic resonance imaging (MRI) provides excellent contrast and can potentially be used in place computed tomography. Segmentation shoulder anatomy, particularly humeral head acetabulum, needed detailed assessment each anatomy preparation. In this study, we compared performance two popular deep learning models based on Google’s DeepLab U-Net to perform automated segmentation...
The present preliminary study aims to characterize brain metastases (BM) using T1 and T2 maps generated from newer, rapid, synthetic MRI (MAGnetic resonance image Compilation; MAGiC) in a clinical setting. We acquired data 11 BM patients on 3T scanner. A multiple-dynamic multiple-echo (MDME) sequence was used for acquisition reconstruction, including post-processing. MDME is multi-contrast that enables absolute quantification of physical tissue properties, T2, independent the scanner...
The purpose of the current study was to develop a deep learning technique called Golden‐angle RAdial Sparse Parallel Network (GRASPnet) for fast reconstruction dynamic contrast‐enhanced 4D MRI acquired with golden‐angle radial k‐space trajectories. GRASPnet operates in image‐time space and does not use explicit data consistency minimize time. Three different network architectures were developed: (1) GRASPnet‐2D: 2D convolutional kernels (x,y) coil contrast dimensions collapsed into single...
Background Oblique sagittal MRI sequences, orthogonal to the longitudinal axis of brachial plexus, can reliably depict morphologic and signal abnormalities. However, nerve visualization may be obscured by ghosting artifact from periodic respiratory motion. Respiratory triggering (RT) with a thoracoabdominal bellows reduce artifact, but it is not routinely used for plexus MRI. Furthermore, efficacy prospective RT imaging has yet been reported. Purpose To compare sequences acquired without...