Results 21 to 30 of about 93,892 (190)
NeuroImage, 2023 Purpose: To develop a high-fidelity diffusion MRI acquisition and reconstruction framework with reduced echo-train-length for less T2* image blurring compared to typical highly accelerated echo-planar imaging (EPI) acquisitions at sub-millimeter ...
Congyu Liao +9 more
doaj +1 more source
Simultaneous multislice acquisition with multi-contrast segmented EPI for separation of signal contributions in dynamic contrast-enhanced imaging [PDF]
, 2018 We present a method to efficiently separate signal in magnetic resonance imaging (MRI) into a base signal S0, representing the mainly T1-weighted component without T2*-relaxation, and its T2*-weighted counterpart by the rapid acquisition of multiple ...
Eickel, Klaus +5 more
core +2 more sources
High-resolution echo-planar spectroscopic imaging of the human calf. [PDF]
PLoS ONE, 2014 BACKGROUND: This study exploits the speed benefits of echo-planar spectroscopic imaging (EPSI) to acquire lipid spectra of skeletal muscle. The main purpose was to develop a high-resolution EPSI technique for clinical MR scanner, to visualise the bulk ...
Jan Weis +3 more
doaj +1 more source
Potential use of oxygen as a metabolic biosensor in combination with T2*-weighted MRI to define the ischemic penumbra [PDF]
, 2008 We describe a novel magnetic resonance imaging technique for detecting metabolism indirectly through changes in oxyhemoglobin:deoxyhemoglobin ratios and T2* signal change during ‘oxygen challenge’ (OC, 5 mins 100% O2). During OC, T2* increase reflects O2
Barrie Condon +14 more
core +1 more source
The impact of computed high b-value images on the diagnostic accuracy of DWI for prostate cancer: A receiver operating characteristics analysis. [PDF]
, 2018 To evaluate the performance of computed high b value diffusion-weighted images (DWI) in prostate cancer detection. 97 consecutive patients who had undergone multiparametric MRI of the prostate followed by biopsy were reviewed.
Daniel, Bruce L +10 more
core +2 more sources
Multiband echo‐shifted echo planar imaging [PDF]
Magnetic Resonance in Medicine, 2016 PurposeTo propose the technique multiband echo‐shifted (MESH) echo planar imaging (EPI), which combines the principles of echo‐shifted acquisition for two‐dimensional multislice EPI, with both in‐plane and multiband acceleration by means of partial parallel imaging techniques.MethodsMESH EPI is suitable for functional MRI (fMRI) in situations where ...
Boyacioglu, R., Schulz, J, Norris, D.G.
openaire +2 more sources
Incorporating Relaxivities to More Accurately Reconstruct MR Images [PDF]
, 2015 Purpose To develop a mathematical model that incorporates the magnetic resonance relaxivities into the image reconstruction process in a single step. Materials and methods In magnetic resonance imaging, the complex-valued measurements of the acquired ...
Bruce, Iain P. +2 more
core +2 more sources
Evaluation of 2D Imaging Schemes for Pulsed Arterial Spin Labeling of the Human Kidney Cortex
Diagnostics, 2018 A number of imaging readout schemes are proposed for renal arterial spin labeling (ASL) to quantify kidney cortex perfusion, including gradient echo-based methods of balanced fast field echo (bFFE) and gradient-echo echo-planar imaging (GE-EPI), or spin ...
Charlotte E. Buchanan +2 more
doaj +1 more source
RadioGraphics, 1994 Echo-planar imaging is a fast magnetic resonance (MR) imaging technique that allows acquisition of single images in as little as 20 msec and performance of multiple-image studies in as little as 20 seconds. Echo-planar imaging achieves its speed by obtaining all spatial-encoding information after a single radio-frequency (RF) excitation.
openaire +2 more sources
3D Echo Planar Time-resolved Imaging (3D-EPTI) for ultrafast multi-parametric quantitative MRI
NeuroImage, 2022 Multi-parametric quantitative MRI has shown great potential to improve the sensitivity and specificity of clinical diagnosis and to enhance our understanding of complex brain processes, but suffers from long scan time especially at high spatial ...
Fuyixue Wang +5 more
doaj +1 more source