Echo-Planar Imaging

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  Subject Areas on Research

  • A fast spin echo technique with circular sampling. 
  • A robust multi-shot scan strategy for high-resolution diffusion weighted MRI enabled by multiplexed sensitivity-encoding (MUSE). 
  • A single-shot T2 mapping protocol based on echo-split gradient-spin-echo acquisition and parametric multiplexed sensitivity encoding based on projection onto convex sets reconstruction. 
  • Accelerating EPI distortion correction by utilizing a modern GPU-based parallel computation. 
  • Activity and functional connectivity of inferior frontal cortex associated with response conflict. 
  • Application of k-space energy spectrum analysis to susceptibility field mapping and distortion correction in gradient-echo EPI. 
  • Assessment of 3D proton MR echo-planar spectroscopic imaging using automated spectral analysis. 
  • Assessment of cerebral microcirculation in a patient with hypertensive encephalopathy using MR perfusion imaging. 
  • Blipped multi gradient-echo slice excitation profile imaging (bmGESEPI) for fast T2 * measurements with macroscopic B0 inhomogeneity compensation. 
  • Complex fetal disorders: effect of MR imaging on management--preliminary clinical experience. 
  • Contrast-enhanced free-breathing 3D T1-weighted gradient-echo sequence for hepatobiliary MRI in patients with breath-holding difficulties. 
  • Correction for EPI distortions using multi-echo gradient-echo imaging. 
  • Correction for direction-dependent distortions in diffusion tensor imaging using matched magnetic field maps. 
  • Cortical mechanisms for the segregation and representation of acoustic textures. 
  • Creutzfeldt-jakob disease involvement of rolandic cortex: a quantitative apparent diffusion coefficient evaluation. 
  • Deep venous thrombosis: gradient-recalled-echo MR imaging changes over time--experience in 10 patients. 
  • Diffusion weighted fMRI at 1.5 T. 
  • Diffusion-weighted MR imaging of the normal human spinal cord in vivo. 
  • Dual gradient-echo in-phase and opposed-phase hepatic MR imaging: a useful tool for evaluating more than fatty infiltration or fatty sparing. 
  • Dynamic and inherent B0 correction for DTI using stimulated echo spiral imaging. 
  • Echo-volume imaging. 
  • Effect of echo time pair selection on quantitative analysis for adrenal tumor characterization with in-phase and opposed-phase MR imaging: initial experience. 
  • Effect of gadolinium chelate contrast agents on diffusion weighted MR imaging of the liver, spleen, pancreas and kidney at 3 T. 
  • Effectiveness of a three-dimensional dual gradient echo two-point Dixon technique for the characterization of adrenal lesions at 3 Tesla. 
  • Enhanced spatial localization of neuronal activation using simultaneous apparent-diffusion-coefficient and blood-oxygenation functional magnetic resonance imaging. 
  • Fast spectroscopic imaging strategies for potential applications in fMRI. 
  • Functional MR imaging using a visually guided saccade paradigm for comparing activation patterns in patients with probable Alzheimer's disease and in cognitively able elderly volunteers. 
  • Functional MRI using regularized parallel imaging acquisition. 
  • Functional gait outcomes for idiopathic normal pressure hydrocephalus after primary endoscopic third ventriculostomy. 
  • GRASE improves spatial resolution in single shot imaging. 
  • Gray and white matter brain chemistry in young children with autism. 
  • High-field (9.4 T) MRI of brain dysmyelination by quantitative mapping of magnetic susceptibility. 
  • High-resolution echo-planar fMRI of human visual cortex at 3.0 tesla. 
  • Improved image reconstruction for partial Fourier gradient-echo echo-planar imaging (EPI). 
  • Integrated parallel reception, excitation, and shimming (iPRES) with multiple shim loops per radio-frequency coil element for improved B0 shimming. 
  • Interleaved EPI based fMRI improved by multiplexed sensitivity encoding (MUSE) and simultaneous multi-band imaging. 
  • Interleaved diffusion-weighted improved by adaptive partial-Fourier and multiband multiplexed sensitivity-encoding reconstruction. 
  • Joint 2D and 3D phase processing for quantitative susceptibility mapping: application to 2D echo-planar imaging. 
  • Joint correction of Nyquist artifact and minuscule motion-induced aliasing artifact in interleaved diffusion weighted EPI data using a composite two-dimensional phase correction procedure. 
  • Late-life depression and microstructural abnormalities in dorsolateral prefrontal cortex white matter. 
  • Lymphomas and high-grade astrocytomas: comparison of water diffusibility and histologic characteristics. 
  • MR imaging of high-grade cerebral gliomas: value of diffusion-weighted echoplanar pulse sequences. 
  • Motion immune diffusion imaging using augmented MUSE for high-resolution multi-shot EPI. 
  • Multi-spin echo spatial encoding provides three-fold improvement of temperature precision during intermolecular zero quantum thermometry. 
  • Neural mechanisms of top-down control during spatial and feature attention. 
  • Optimized MR imaging for polyacrylamide gel dosimetry. 
  • Optimized distortion correction technique for echo planar imaging. 
  • Optimized isotropic diffusion weighting. 
  • Overview of diffusion imaging. 
  • PROPELLER EPI: an MRI technique suitable for diffusion tensor imaging at high field strength with reduced geometric distortions. 
  • Phase correction for three-dimensional (3D) diffusion-weighted interleaved EPI using 3D multiplexed sensitivity encoding and reconstruction (3D-MUSER). 
  • Potential use of oxygen as a metabolic biosensor in combination with T2*-weighted MRI to define the ischemic penumbra. 
  • Rapid three-dimensional MR imaging method for tracking a bolus of contrast agent through the brain. 
  • Regional brain chemical alterations in young children with autism spectrum disorder. 
  • Regional differences in the refractory period of the hemodynamic response: an event-related fMRI study. 
  • Removal of EPI Nyquist ghost artifacts with two-dimensional phase correction. 
  • Segmented spin-echo pulses to increase fMRI signal: repeated intrinsic diffusional enhancement. 
  • Separation of parallel encoded complex-valued slices (SPECS) from a single complex-valued aliased coil image. 
  • Simultaneous and inherent correction of B0 and eddy-current induced distortions in high-resolution diffusion MRI using reversed polarity gradients and multiplexed sensitivity encoding (RPG-MUSE). 
  • Simultaneous multislice acquisition with arterial-flow tagging (SMART) using echo planar imaging (EPI). 
  • Single-shot EPI with signal recovery from the susceptibility-induced losses. 
  • Spatially selective T2 and T2 * measurement with line-scan echo-planar spectroscopic imaging. 
  • Spin-echo magnetic resonance spectroscopic imaging at 7 T with frequency-modulated refocusing pulses. 
  • Structure--function spatial covariance in the human visual cortex. 
  • Task-independent and task-specific age effects on brain activity during working memory, visual attention and episodic retrieval. 
  • Temperature dependence of canine brain tissue diffusion coefficient measured in vivo with magnetic resonance echo-planar imaging. 
  • Temperature mapping considerations in the breast with line scan echo planar spectroscopic imaging. 
  • The effect of daily caffeine use on cerebral blood flow: How much caffeine can we tolerate? 
  • Two-dimensional phase cycled reconstruction for inherent correction of echo-planar imaging Nyquist artifacts. 
  • fMRI: methodology--acquisition and processing. 
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  Keywords of People

  • Chen, Nan-kuei, Adjunct Associate Professor in the Department of Radiology, Radiology
  • Johnson, G. Allan, Charles E. Putman University Professor of Radiology, Physics