Results 51 to 60 of about 2,779 (160)

A Brainstem Radiomics Framework to Distinguish Progressive Supranuclear Palsy from Parkinson's Disease

Movement Disorders, EarlyView.
Abstract Background Differentiating progressive supranuclear palsy (PSP) from Parkinson's disease (PD) can be clinically challenging. In the neuroimaging field, radiomics has emerged as a promising approach to capture subtle microstructural and textural image alterations, improving differential diagnoses.
Chiara Camastra, Jolanda Buonocore, Antonio Augimeri, Camilla Calomino, Maria Giovanna Bianco, Alessia Sarica, Pier Paolo Arcuri, Aldo Quattrone, Andrea Quattrone   +8 more
wiley   +1 more source

Quantitative Susceptibility Mapping of the Basal Ganglia and Thalamus at 9.4 Tesla

Frontiers in Neuroanatomy, 2021
The thalamus (Th) and basal ganglia (BG) are central subcortical connectivity hubs of the human brain, whose functional anatomy is still under intense investigation.
Vinod Jangir Kumar, Klaus Scheffler, Klaus Scheffler, Gisela E. Hagberg, Gisela E. Hagberg, Wolfgang Grodd   +5 more
doaj   +1 more source

Evaluation of Phantom Doping Materials in Quantitative Susceptibility Mapping

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To measure magnetic susceptibility (χ) with Quantitative Susceptibility Mapping (QSM) and evaluate its repeatability using four phantom doping materials relevant to QSM applications. Methods A cylindrical phantom was constructed containing vials of agarose gel doped with two paramagnetic materials (ferritin, USPIO) and two diamagnetic ...
Padriac Hooper, Jin Jin, Kieran O'Brien, Monique Tourell, Simon Daniel Robinson, Markus Barth   +5 more
wiley   +1 more source

Fully‐Constrained Variable Projection for Water‐Fat Models

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Variable projection (VARPRO) is an effective technique to reduce the dimensionality of least squares optimization problems through the elimination of linear parameters. For water‐fat models, constrained VARPRO variants have been proposed in the literature to ensure that water and fat components are aligned at TE = 0, thereby preventing
Carl Ganter, Jonathan Stelter, Louis Peyratoux, Dimitrios C. Karampinos, Oliver Bieri   +4 more
wiley   +1 more source

Quantitative susceptibility mapping (QSM) of white matter multiple sclerosis lesions: Interpreting positive susceptibility and the presence of iron [PDF]

Magnetic Resonance in Medicine, 2014
PurposeWithin multiple sclerosis (MS) lesions iron is present in chronically activated microglia. Thus, iron detection with MRI might provide a biomarker for chronic inflammation within lesions. Here, we examine contributions of iron and myelin to magnetic susceptibility of lesions on quantitative susceptibility mapping (QSM).MethodsFixed MS brain ...
Cynthia, Wisnieff, Sriram, Ramanan, John, Olesik, Susan, Gauthier, Yi, Wang, David, Pitt   +5 more
openaire   +2 more sources

Distribution Indices of Magnetic Susceptibility Values in the Primary Motor Cortex Enable to Classify Patients with Amyotrophic Lateral Sclerosis

Brain Sciences, 2022
Quantitative Susceptibility Mapping (QSM) can measure iron concentration increase in the primary motor cortex (M1) of patients with Amyotrophic Lateral Sclerosis (ALS).
Mauro Costagli, Graziella Donatelli, Paolo Cecchi, Paolo Bosco, Gianmichele Migaleddu, Gabriele Siciliano, Mirco Cosottini   +6 more
doaj   +1 more source

Single‐Shot 2D Radial Echo Planar Imaging for Functional MRI

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To develop a novel single‐shot radial echo planar imaging (ss‐rEPI) technique for rapid, distortion‐free brain imaging in functional MRI experiments. Methods Radial multi‐gradient echo (radial mGRE) data were acquired on a 3T clinical scanner using a 2D ss‐rEPI readout with small golden‐angle rotations between echoes.
Christoph A. Rettenmeier, Zidan Yu, Krystalyn Edwards‐Calma, Kai Tobias Block, V. Andrew Stenger   +4 more
wiley   +1 more source

Towards in vivo ground truth susceptibility for single-orientation deep learning QSM: A multi-orientation gradient-echo MRI dataset

NeuroImage, 2022
Recently, deep neural networks have shown great potential for solving dipole inversion of quantitative susceptibility mapping (QSM) with improved results. However, these studies utilized their limited dataset for network training and inference, which may
Yuting Shi, Ruimin Feng, Zhenghao Li, Jie Zhuang, Yuyao Zhang, Hongjiang Wei   +5 more
doaj   +1 more source

Quantitative Susceptibility Mapping of Kidney Stones: An Ex Vivo MRI Phantom Study

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To visualize and characterize the five most common kidney stone types based on their magnetic susceptibilities in MRI using QSM. Methods Three water‐based agar phantoms were constructed, containing a total of 53 ex vivo kidney stones of varying types and sizes.
Lion H. Mücke, Frederik B. Laun, Ruben de Figueiredo Cardoso, Guillaume Flé, Jennifer Lorenz, Alexander Fichte, Michael Uder, Nadine Bayerl, Jannis Hanspach   +8 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