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).
- Activity and functional connectivity of inferior frontal cortex associated with response conflict.
- Antidepressant-like effects of cranial stimulation within a low-energy magnetic field in rats.
- 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.
- Contrast-enhanced free-breathing 3D T1-weighted gradient-echo sequence for hepatobiliary MRI in patients with breath-holding difficulties.
- Correction for direction-dependent distortions in diffusion tensor imaging using matched magnetic field maps.
- Cortical mechanisms for the segregation and representation of acoustic textures.
- 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.
- Evaluation of eddy current distortion and field inhomogeneity distortion corrections in MR diffusion imaging using log-demons DIR method.
- 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 gait outcomes for idiopathic normal pressure hydrocephalus after primary endoscopic third ventriculostomy.
- 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.
- Integrated parallel reception, excitation, and shimming (iPRES) with multiple shim loops per radio-frequency coil element for improved B0 shimming.
- Integrated radio-frequency/wireless coil design for simultaneous MR image acquisition and wireless communication.
- 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 isotropic diffusion weighting.
- Overview of diffusion imaging.
- 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.
- 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).
- Single-shot EPI with signal recovery from the susceptibility-induced losses.
- 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.
- 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
- Johnson, G. Allan, Charles E. Putman University Distinguished Professor of Radiology, Biomedical Engineering