Beaumont, Jérémy Gambarota, Giulio Saint-Jalmes, Hervé Acosta, Oscar Ferré, Jean-Christophe Raniga, Parnesh Fripp, Jurgen
Published in
Magnetic resonance in medicine
To demonstrate that fluid and white matter suppression (FLAWS) imaging can be used for high-resolution T1 mapping with low transmitted bias field ( B 1 + ) sensitivity at 7T. The FLAWS sequence was optimized for 0.8-mm isotropic resolution imaging. The theoretical accuracy and precision of the FLAWS T1 mapping was compared with the one of the magne...
Foxley, Sean Wildenberg, Gregg Sampathkumar, Vandana Karczmar, Gregory S Brugarolas, Pedro Kasthuri, Narayanan
Published in
Magnetic resonance in medicine
Dysmyelinating diseases are characterized by abnormal myelin formation and function. Such microstructural abnormalities in myelin have been demonstrated to produce measurable effects on the MR signal. This work examines these effects on measurements of voxel-wise, high-resolution water spectra acquired using a 3D echo-planar spectroscopic imaging (...
Aliotta, Eric Nourzadeh, Hamidreza Patel, Sohil H
Published in
Magnetic resonance in medicine
To develop and evaluate machine-learning methods that reconstruct fractional anisotropy (FA) values and mean diffusivities (MD) from 3-direction diffusion MRI (dMRI) acquisitions. Two machine-learning models were implemented to map undersampled dMRI signals with high-quality FA and MD maps that were reconstructed from fully sampled DTI scans. The f...
Reichert, Andreas Reiss, Simon Krafft, Axel Joachim Bock, Michael
Published in
Magnetic resonance in medicine
Acceleration of a passive tracking sequence based on phase-only cross-correlation (POCC) using radial undersampling. The phase-only cross-correlation (POCC) algorithm allows passive tracking of interventional instruments in real-time. In a POCC sequence, two cross-sectional images of a needle guide with a positive MR contrast are continuously acqui...
Guo, Rong Zhao, Yibo Li, Yudu Wang, Tianyao Li, Yao Sutton, Brad Liang, Zhi-Pei
Published in
Magnetic resonance in medicine
To achieve high-resolution mapping of brain tissue susceptibility in simultaneous QSM and metabolic imaging. Simultaneous QSM and metabolic imaging was first achieved using SPICE (spectroscopic imaging by exploiting spatiospectral correlation), but the QSM maps thus obtained were at relatively low-resolution (2.0 × 3.0 × 3.0 mm3 ). We overcome this...
Sui, Yi Arani, Arvin Trzasko, Joshua D Murphy, Matthew C Rossman, Phillip J Glaser, Kevin J McGee, Kiaran P Manduca, Armando Ehman, Richard L Araoz, Philip A
...
Published in
Magnetic resonance in medicine
To develop a novel magnetic resonance elastography (MRE) acquisition using a hybrid radial EPI readout scheme (TURBINE), and to demonstrate its feasibility to obtain wave images and stiffness maps in a phantom and in vivo brain. The proposed 3D TURBINE-MRE is based on a spoiled gradient-echo MRE sequence with the EPI readout radially rotating about...
Geldschläger, Ole Bosch, Dario Avdievich, Nikolai I Henning, Anke
Published in
Magnetic resonance in medicine
To present the results of the first human spinal cord in vivo MRI scans at 9.4T. A human brain coil was used to image the human spinal cord at 9.4T. All anatomical images were acquired with a T2 *-weighted gradient-echo sequence. A comparison of the influence of four different B0 shimming routines on the image quality was performed. Intrinsic signa...
Sijtsema, Nienke D Petit, Steven F Poot, Dirk H J Verduijn, Gerda M van der Lugt, Aad Hoogeman, Mischa S Hernandez-Tamames, Juan A
Published in
Magnetic resonance in medicine
To optimize the diffusion-weighting b values and postprocessing pipeline for hybrid intravoxel incoherent motion diffusion kurtosis imaging in the head and neck region. Optimized diffusion-weighting b value sets ranging between 5 and 30 b values were constructed by optimizing the Cramér-Rao lower bound of the hybrid intravoxel incoherent motion dif...
Mattern, Hendrik Knoll, Martin Lüsebrink, Falk Speck, Oliver
Published in
Magnetic resonance in medicine
Publicly available data provision is an essential part of open science. However, open data can conflict with data privacy and data protection regulations. Head scans are particularly vulnerable because the subject's face can be reconstructed from the acquired images. Although defacing can impede subject identification in reconstructed images, this ...
Deh, Kofi Granlund, Kristin L Eskandari, Roozbeh Kim, Nathaniel Mamakhanyan, Arsen Keshari, Kayvan R
Published in
Magnetic resonance in medicine
To generate dynamic, volumetric maps of hyperpolarized [1-13 C]pyruvate and its metabolic products in vivo. Maps of chemical species were generated with iterative least squares (IDEAL) reconstruction from multiecho echo-planar imaging (EPI) of phantoms of thermally polarized 13 C-labeled chemicals and mice injected with hyperpolarized [1-13 C]pyruv...
