Trong-Kha Truong

Journal Article Magn Reson Med · February 2024 Featured Publication PURPOSE: To develop a flexible, lightweight, and multi-purpose integrated parallel reception, excitation, and shimming (iPRES) coil array that can conform to the subject's anatomy and perform MR imaging and localized B0 shimming in different anatomical reg ... Full text Link to item Cite

Depth- and curvature-based quantitative susceptibility mapping analyses of cortical iron in Alzheimer's disease.

Journal Article Cereb Cortex · January 31, 2024 Featured Publication In addition to amyloid beta plaques and neurofibrillary tangles, Alzheimer's disease (AD) has been associated with elevated iron in deep gray matter nuclei using quantitative susceptibility mapping (QSM). However, only a few studies have examined cortical ... Full text Open Access Link to item Cite

Numerical simulations of an integrated radio-frequency/wireless coil design for simultaneous acquisition and wireless transfer of magnetic resonance imaging data.

Journal Article Phys Med Biol · June 8, 2023 Featured Publication Objective.A novel magnetic resonance imaging (MRI) radio-frequency (RF) coil design, termed an integrated RF/wireless (iRFW) coil design, can simultaneously perform MRI signal reception and far-field wireless data transfer with the same coil conductors bet ... Full text Link to item Cite

Column-based cortical depth analysis of the diffusion anisotropy and radiality in submillimeter whole-brain diffusion tensor imaging of the human cortical gray matter in vivo.

Journal Article Neuroimage · April 15, 2023 Featured Publication High-resolution diffusion tensor imaging (DTI) can noninvasively probe the microstructure of cortical gray matter in vivo. In this study, 0.9-mm isotropic whole-brain DTI data were acquired in healthy subjects with an efficient multi-band multi-shot echo-p ... Full text Link to item Cite

An iPRES-W Coil Array for Simultaneous Imaging and Wireless Localized B0 Shimming of the Cervical Spinal Cord.

Journal Article Magn Reson Med · August 2022 Featured Publication PURPOSE: To develop a wireless integrated parallel reception, excitation, and shimming (iPRES-W) coil array for simultaneous imaging and wireless localized B0 shimming, and to demonstrate its ability to correct for distortions in DTI of the spinal cord in ... Full text Link to item Cite

Recent Advances in Radio-Frequency Coil Technologies: Flexible, Wireless, and Integrated Coil Arrays.

Journal Article J Magn Reson Imaging · April 2022 Featured Publication Radio-frequency (RF) coils are to magnetic resonance imaging (MRI) scanners what eyes are to the human body. Because of their critical importance, there have been constant innovations driving the rapid development of RF coil technologies. Over the past fou ... Full text Link to item Cite

Application of an integrated radio-frequency/shim coil technology for signal recovery in fMRI.

Journal Article Magn Reson Med · December 2021 Featured Publication PURPOSE: Gradient-echo echo-planar imaging (EPI), which is typically used for blood oxygenation level-dependent (BOLD) functional MRI (fMRI), suffers from distortions and signal loss caused by localized B0 inhomogeneities. Such artifacts cannot be effectiv ... Full text Link to item Cite

Age-related differences in the neural bases of phonological and semantic processes in the context of task-irrelevant information.

Journal Article Cogn Affect Behav Neurosci · August 2019 Featured Publication As we age we have increasing difficulty with phonological aspects of language production. Yet semantic processes are largely stable across the life span. This suggests a fundamental difference in the cognitive and potentially neural architecture supporting ... Full text Open Access Link to item Cite

Toward direct MRI of neuro-electro-magnetic oscillations in the human brain.

Journal Article Magn Reson Med · June 2019 Featured Publication PURPOSE: Neuroimaging techniques are widely used to investigate the function of the human brain, but none are currently able to accurately localize neuronal activity with both high spatial and temporal specificity. Here, a new in vivo MRI acquisition and a ... Full text Link to item Cite

Integrated radio-frequency/wireless coil design for simultaneous MR image acquisition and wireless communication.

Journal Article Magn Reson Med · March 2019 Featured Publication PURPOSE: An innovative radio-frequency (RF) coil design that allows RF currents both at the Larmor frequency and in a wireless communication band to flow on the same coil is proposed to enable simultaneous MRI signal reception and wireless data transfer, t ... Full text Link to item Cite

Adaptive integrated parallel reception, excitation, and shimming (iPRES-A) with microelectromechanical systems switches.

Journal Article Magn Reson Med · July 2018 Featured Publication PURPOSE: Integrated parallel reception, excitation, and shimming coil arrays with N shim loops per radio-frequency (RF) coil element (iPRES(N)) allow an RF current and N direct currents (DC) to flow in each coil element, enabling simultaneous reception/exc ... Full text Link to item Cite

Phase-updated regularized SENSE for navigator-free multishot diffusion imaging.

Journal Article Magn Reson Med · July 2017 Featured Publication PURPOSE: Either SENSE+CG or POCS-ICE methods can be used to correct for motion-induced phase errors in navigator-free multishot diffusion imaging. SENSE+CG has the advantage of a fast convergence, however, occasionally the convergence can be unstable, thus ... Full text Link to item Cite

Integrated parallel reception, excitation, and shimming (iPRES) with multiple shim loops per radio-frequency coil element for improved B0 shimming.

Journal Article Magn Reson Med · May 2017 Featured Publication PURPOSE: Integrated parallel reception, excitation, and shimming (iPRES) coil arrays allow radio-frequency currents and direct currents to flow in the same coils, which enables excitation/reception and localized B0 shimming with a single coil array. The pu ... Full text Link to item Cite

POCS-based reconstruction of multiplexed sensitivity encoded MRI (POCSMUSE): A general algorithm for reducing motion-related artifacts.

Journal Article Magn Reson Med · November 2015 Featured Publication PURPOSE: A projection onto convex sets reconstruction of multiplexed sensitivity encoded MRI (POCSMUSE) is developed to reduce motion-related artifacts, including respiration artifacts in abdominal imaging and aliasing artifacts in interleaved diffusion-we ... Full text Open Access Link to item Cite

Correction for Eddy Current-Induced Echo-Shifting Effect in Partial-Fourier Diffusion Tensor Imaging.

Journal Article Biomed Res Int · 2015 Featured Publication In most diffusion tensor imaging (DTI) studies, images are acquired with either a partial-Fourier or a parallel partial-Fourier echo-planar imaging (EPI) sequence, in order to shorten the echo time and increase the signal-to-noise ratio (SNR). However, edd ... Full text Open Access Link to item Cite

Integrated RF/shim coil array for parallel reception and localized B0 shimming in the human brain.

Journal Article Neuroimage · December 2014 Featured Publication The purpose of this work was to develop a novel integrated radiofrequency and shim (RF/shim) coil array that can perform parallel reception and localized B0 shimming in the human brain with the same coils, thereby maximizing both the signal-to-noise ratio ... Full text Link to item Cite

Dynamic and inherent B0 correction for DTI using stimulated echo spiral imaging.

Journal Article Magn Reson Med · March 2014 Featured Publication PURPOSE: To present a novel technique for high-resolution stimulated echo diffusion tensor imaging with self-navigated interleaved spirals readout trajectories that can inherently and dynamically correct for image artifacts due to spatial and temporal vari ... Full text Link to item Cite

High-resolution multishot spiral diffusion tensor imaging with inherent correction of motion-induced phase errors.

Journal Article Magn Reson Med · February 2014 Featured Publication PURPOSE: To develop and compare three novel reconstruction methods designed to inherently correct for motion-induced phase errors in multishot spiral diffusion tensor imaging without requiring a variable-density spiral trajectory or a navigator echo. THEOR ... Full text Link to item Cite

Cortical depth dependence of the diffusion anisotropy in the human cortical gray matter in vivo.

Journal Article PLoS One · 2014 Featured Publication Diffusion tensor imaging (DTI) is typically used to study white matter fiber pathways, but may also be valuable to assess the microstructure of cortical gray matter. Although cortical diffusion anisotropy has previously been observed in vivo, its cortical ... Full text Link to item Cite

Electromagnetohydrodynamic modeling of Lorentz effect imaging.

Journal Article J Magn Reson · November 2013 Featured Publication Lorentz Effect Imaging (LEI) is an MRI technique that has been proposed for direct imaging of neuronal activity. While promising results have been obtained in phantoms and in the human median nerve in vivo, its contrast mechanism is still not fully underst ... Full text Link to item Cite

Integrated parallel reception, excitation, and shimming (iPRES).

Journal Article Magn Reson Med · July 2013 Featured Publication PURPOSE: To develop a new concept for a hardware platform that enables integrated parallel reception, excitation, and shimming. THEORY: This concept uses a single coil array rather than separate arrays for parallel excitation/reception and B0 shimming. It ... Full text Link to item Cite

Inherent correction of motion-induced phase errors in multishot spiral diffusion-weighted imaging.

Journal Article Magn Reson Med · October 2012 Featured Publication Multishot spiral imaging is a promising alternative to echo-planar imaging for high-resolution diffusion-weighted imaging and diffusion tensor imaging. However, subject motion in the presence of diffusion-weighting gradients causes phase inconsistencies am ... Full text Link to item Cite

Dynamic correction of artifacts due to susceptibility effects and time-varying eddy currents in diffusion tensor imaging.

Journal Article Neuroimage · August 15, 2011 Featured Publication In diffusion tensor imaging (DTI), spatial and temporal variations of the static magnetic field (B(0)) caused by susceptibility effects and time-varying eddy currents result in severe distortions, blurring, and misregistration artifacts, which in turn lead ... Full text Link to item Cite

Neural mechanisms of context effects on face recognition: automatic binding and context shift decrements.

Journal Article J Cogn Neurosci · November 2010 Featured Publication Although people do not normally try to remember associations between faces and physical contexts, these associations are established automatically, as indicated by the difficulty of recognizing familiar faces in different contexts ("butcher-on-the-bus" phe ... Full text Open Access Link to item Cite

Application of k-space energy spectrum analysis for inherent and dynamic B0 mapping and deblurring in spiral imaging.

Journal Article Magn Reson Med · October 2010 Featured Publication Spiral imaging is vulnerable to spatial and temporal variations of the amplitude of the static magnetic field (B(0)) caused by susceptibility effects, eddy currents, chemical shifts, subject motion, physiological noise, and system instabilities, resulting ... Full text Link to item Cite

Apparent diffusion coefficient dependent fMRI: Spatiotemporal characteristics and implications on calibrated fMRI

Journal Article International Journal of Imaging Systems and Technology · March 1, 2010 Featured Publication In this manuscript, we review the development of an alternative functional magnetic resonance imaging (fMRI) contrast mechanism based on the apparent diffusion coefficient (ADC), in light of the recent progress in other complementary functional imaging con ... Full text Cite

Distinct value signals in anterior and posterior ventromedial prefrontal cortex.

Journal Article J Neurosci · February 17, 2010 Featured Publication The core feature of an economic exchange is a decision to trade one good for another, based on a comparison of relative value. Economists have long recognized, however, that the value an individual ascribes to a good during decision making (i.e., their rel ... Full text Link to item Cite

Cortical depth dependence and implications on the neuronal specificity of the functional apparent diffusion coefficient contrast.

Journal Article Neuroimage · August 1, 2009 Featured Publication Although the blood oxygenation level-dependent (BOLD) contrast is widely used in functional MRI (fMRI), its spatial specificity is compromised by the diversity of the participating vasculature, including large draining veins. Previous studies have shown th ... Full text Link to item Cite

Dynamic MRI of small electrical activity.

Journal Article Methods Mol Biol · 2009 Featured Publication Neuroscience methods entailing in vivo measurements of brain activity have greatly contributed to our understanding of brain function for the past decades, from the invasive early studies in animals using single-cell electrical recordings, to the noninvasi ... Full text Link to item Cite

Integrated SENSE DTI with correction of susceptibility- and eddy current-induced geometric distortions.

Journal Article Neuroimage · March 1, 2008 Featured Publication Diffusion tensor imaging (DTI) is vulnerable to geometric distortions caused by subject-dependent susceptibility effects and diffusion-weighting direction-dependent eddy currents. Although the introduction of sensitivity encoding (SENSE) has reduced the ov ... Full text Link to item Cite

Lorentz effect imaging of ionic currents in solution.

Journal Article J Magn Reson · March 2008 Featured Publication Current functional MRI techniques relying on hemodynamic modulations are inherently limited in their ability to accurately localize neural activity in space and time. To address these limitations, we previously proposed a novel technique based on the Loren ... Full text Link to item Cite

Single-shot dual-z-shimmed sensitivity-encoded spiral-in/out imaging for functional MRI with reduced susceptibility artifacts.

Journal Article Magn Reson Med · January 2008 Featured Publication Blood oxygenation level-dependent (BOLD) functional MRI (fMRI) can be severely hampered by signal loss due to susceptibility-induced static magnetic field (B(0)) inhomogeneities near air/tissue interfaces. A single-shot spiral-in/out sequence with a z-shim ... Full text Link to item Cite

Single-shot ADC imaging for fMRI.

Journal Article Magn Reson Med · February 2007 Featured Publication It has been suggested that apparent diffusion coefficient (ADC) contrast can be sensitive to cerebral blood flow (CBF) changes during brain activation. However, current ADC imaging techniques have an inherently low temporal resolution due to the requiremen ... Full text Link to item Cite

Finding neuroelectric activity under magnetic-field oscillations (NAMO) with magnetic resonance imaging in vivo.

Journal Article Proc Natl Acad Sci U S A · August 15, 2006 Featured Publication Neuroimaging techniques are among the most important tools for investigating the function of the human nervous system and for improving the clinical diagnosis of neurological disorders. However, most commonly used techniques are limited by their invasivene ... Full text Link to item Cite

Blipped multi gradient-echo slice excitation profile imaging (bmGESEPI) for fast T2 * measurements with macroscopic B0 inhomogeneity compensation.

Journal Article Magn Reson Med · June 2006 Featured Publication With the rapid development of human MRI at field strengths > or = 7 T, knowledge of T(2) (*) relaxation times at such field strengths is needed to optimize acquisition parameters and understand relaxation mechanisms in many applications. However, standard ... Full text Link to item Cite

Synchronized detection of minute electrical currents with MRI using Lorentz effect imaging.

Journal Article J Magn Reson · March 2006 Featured Publication The blood oxygenation level-dependent (BOLD) effect is the most commonly used contrast mechanism in functional magnetic resonance imaging (fMRI), due to its relatively high spatial resolution and sensitivity. However, the ability of BOLD fMRI to accurately ... Full text Link to item Cite

Effects of static and radiofrequency magnetic field inhomogeneity in ultra-high field magnetic resonance imaging.

Journal Article Magn Reson Imaging · February 2006 Featured Publication To characterize the severe static (B(0)) and radiofrequency (B(1)) magnetic field inhomogeneity in ultra-high field (> or =7 T) magnetic resonance imaging, gradient echo (GE) and spin echo (SE) images of in vivo and postmortem human brains were acquired. T ... Full text Link to item Cite

Spin-polarized current-induced magnetization reversal in single nanowires

Journal Article Physical Review B - Condensed Matter and Materials Physics · January 1, 2003 Using electrochemical deposition, 6 μm long Ni nanowires, with typical diameters of the order of 80 nm, are grown in ion-track etched membranes. Electric contacts are established during the growth, allowing resistance measurements of a single magnetic wire ... Full text Cite

Three-dimensional numerical simulations of susceptibility-induced magnetic field inhomogeneities in the human head.

Journal Article Magn Reson Imaging · December 2002 Featured Publication Three-dimensional numerical simulations of the static magnetic field in the human head were carried out to assess the field inhomogeneity due to magnetic susceptibility differences at tissue interfaces. We used a finite difference method and magnetic perme ... Full text Link to item Cite

Magnetization reversal triggered by spin-polarized current in magnetic nanowires

Journal Article Europhysics Letters · December 1, 2001 It is shown experimentally that a pulsed current driven through a Ni nanowire provokes an irreversible magnetization reversal at a field differing from the spontaneous switching field Hsw by ΔH of as much as 40% of Hsw. The state of the magnetization is as ... Full text Cite