Results 71 to 80 of about 4,917,448 (190)

Predicting Mesoscopic Larmor Frequency Shifts in Ex Vivo Porcine Optic Nerve

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Larmor frequency shifts in white matter (WM) vary with fiber orientation due to anisotropic microstructure. Since clinical voxels are significantly larger than these microscopic frequency variations, the measured signal represents a bulk average of local shifts.
Anders Dyhr Sandgaard, André Pampel, Roland Müller, Niklas Wallstein, Toralf Mildner, Carsten Jäger, Markus Morawski, Aage Kristian Olsen Alstrup, Harald E. Möller, Sune Nørhøj Jespersen   +9 more
wiley   +1 more source

MRI R2* and quantitative susceptibility mapping in brain tissue with extreme iron overload

European Radiology Experimental
Background R2* and quantitative susceptibility mapping (QSM) are regarded as robust techniques for assessing iron content in the brain. While these techniques are established for normal or moderate iron levels, their usability in extreme iron overload ...
Christoph Birkl, Marlene Panzer, Christian Kames, Anna Maria Birkl-Toeglhofer, Alexander Rauscher, Bernhard Glodny, Elke R. Gizewski, Heinz Zoller   +7 more
doaj   +1 more source

From Breath‐Hold to Free‐Breathing: Possibilities in High‐Resolution Quantitative Susceptibility Mapping (QSM) of the Kidney With Respiratory Gating

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose This study aimed to assess the feasibility of QSM in the human kidney during free‐breathing using respiratory gating for motion compensation. Methods Renal imaging of 15 healthy volunteers was performed using an axial multi‐echo GRE sequence on a 3 T MRI scanner.
Matthias Deitermann, Birte Sehlmeyer, Thomas Andreas Thiel, Hans‐Jörg Wittsack, Alexandra Ljimani, Anja Müller‐Lutz, Gerald Antoch, Eric Bechler   +7 more
wiley   +1 more source

QQ‐Based Oxygen Extraction Fraction (OEF) Mapping in Mouse Brain: Initial Experience

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Oxygen extraction fraction (OEF) is a vital biomarker of cerebral oxygen metabolism and tissue viability. A novel OEF mapping method, QQ, which combines quantitative susceptibility mapping (QSM) and quantitative blood oxygen level‐dependent (qBOLD) (QSM + qBOLD = QQ), has demonstrated promise in detecting disease‐related OEF ...
Quinn Boyer, Dongkyu Lee, Tian Qiu, HyungJoon Cho, Junghun Cho   +4 more
wiley   +1 more source

Morphology-adaptive total variation for the reconstruction of quantitative susceptibility map from the magnetic resonance imaging phase. [PDF]

PLoS ONE, 2018
Quantitative susceptibility mapping (QSM) is a magnetic resonance imaging technique that quantifies the magnetic susceptibility distribution within biological tissues.
Li Guo, Yingjie Mei, Jijing Guan, Xiangliang Tan, Yikai Xu, Wufan Chen, Qianjin Feng, Yanqiu Feng   +7 more
doaj   +1 more source

Simultaneous T1 and T2 Mapping in the Brain With QuantoRAGE: An MP2RAGE Variant Using T2‐Prepared Inversion

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To develop and validate a repeatable and reproducible approach, QuantoRAGE, for simultaneous whole‐brain T1 and T2 mapping using adiabatic magnetization preparation. Methods QuantoRAGE is a 3D FLASH‐based sequence using an adiabatic T2‐prepared inversion followed by two readout blocks.
Natalia Pato Montemayor, Tâm Johan Nguyên, José P. Marques, Berk Can Açikgöz, Jessica A. M. Bastiaansen, Roland Kreis, Piotr Radojewski, Jonathan Stelter, Dimitrios Karampinos, Jocelyn Philippe, Lina Bacha, Tommaso Di Noto, Bénédicte Maréchal, Dominik Nickel, Patrick A. Liebig, Robin M. Heidemann, Tobias Kober, Jean‐Philippe Thiran, Tom Hilbert, Thomas Yu, Gian Franco Piredda, Gabriele Bonanno   +21 more
wiley   +1 more source

Accelerated MR Elastography Using Learned Neural Network Representation

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To develop a deep‐learning method for achieving fast high‐resolution MR elastography from highly undersampled data without the need for high‐quality training datasets. Methods We first reframed the deep neural network representation as a nonlinear extension of the linear subspace model, then used it to represent and reconstruct MRE ...
Xi Peng
wiley   +1 more source

Table_1_Simultaneous Quantitative Susceptibility Mapping of Articular Cartilage and Cortical Bone of Human Knee Joint Using Ultrashort Echo Time Sequences.xlsx

, 2022
BackgroundIt is of great clinical importance to assess the microstructure of the articular cartilage and cortical bone of the human knee joint. While quantitative susceptibility mapping (QSM) is a promising tool for investigating the knee joint, however,
Yuyao Zhang (594655), Hanqi Wang (1631215), Zhihui Li (294496), Yong Lu (19136), Ming Zhang (9736), Fuhua Yan (281312), Hongjiang Wei (383745), Tongtong Chen (3696985)   +7 more
core   +1 more source

Renal Susceptibility Imaging: Analysis of Susceptibility Weighted Imaging and Quantitative Susceptibility Mapping in Transplanted Kidneys

, 2020
Renal susceptibility imaging is challenging due to the motion artifacts in kidney. In this study, susceptibility weighted imaging (SWI) and quantitative susceptibility mapping (QSM) were performed on transplanted kidney patients, who show less kidney ...
Park, Sung-Hong, Ahn, Hyun-Seo, Kwak, Hyo Sung   +2 more
core   +1 more source

Toward Brain Biosignature at 7 T—Repeatability of a Multiparametric CEST, QSM, QTI, and Sodium Imaging Protocol

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To evaluate the repeatability of an extended multiparametric 7 T MRI protocol for voxel‐wise tissue characterization combining morphological, CEST, QSM, QTI, and Sodium contrasts. Methods A repeatability study was performed in 12 volunteers without diagnosed neurological disease on a 7 T MRI system, using a comprehensive acquisition ...
Annika Hofmann, Martin Freudensprung, Lion Mücke, Tobias Wilferth, Zijin Yang, Dominik Perrin, Julius Glaser, Katharina Tkotz, Magda Duarte, Simon Weinmüller, Oliver Chaudry, Annemarie Wirth, Angelika Mennecke, Oliver Gödicke, Patrick Liebig, Lena V. Gast, Philipp Ehses, Clemens Stilianu, Rudolf Stollberger, Jannis Hanspach, Alexander German, Jürgen Winkler, Michael Uder, Arnd Doerfler, Sebastian Bickelhaupt, Andreas Maier, Katharina Breininger, Moritz Zaiss, Armin M. Nagel, Frederik B. Laun, Florian Knoll   +30 more
wiley   +1 more source