Results 31 to 40 of about 2,739 (132)

Changes of deep gray matter magnetic susceptibility over 2years in multiple sclerosis and healthy control brain

NeuroImage: Clinical, 2018
In multiple sclerosis, pathological changes of both tissue iron and myelin occur, yet these factors have not been characterized in a longitudinal fashion using the novel iron- and myelin-sensitive quantitative susceptibility mapping (QSM) MRI technique ...
Jesper Hagemeier, Robert Zivadinov, Michael G. Dwyer, Paul Polak, Niels Bergsland, Bianca Weinstock-Guttman, Joshua Zalis, Andreas Deistung, Jürgen R. Reichenbach, Ferdinand Schweser   +9 more
doaj   +1 more source

Low thalamostriate venous quantitative susceptibility measurements correlate with higher presenting NIH stroke scale score in emergent large vessel occlusion stroke

Journal of International Medical Research, 2020
Objective Hyperacute stroke affects various patient subgroups who may benefit from different management strategies. Magnetic resonance imaging (MRI) quantitative susceptibility mapping (QSM) is a recent MRI technique for measuring deoxyhemoglobin levels.
Paggie Kim, Kristofer Langheinrich, Brian Cristiano, Phillip Grigsby, Udo Oyoyo, Daniel Kido, J. Paul Jacobson   +6 more
doaj   +1 more source

Amyloid‐β–Related Cortical Susceptibility Alterations in Individuals Under Assessment for Alzheimer's Disease: A χ‐Separation Study

Journal of Magnetic Resonance Imaging, EarlyView.
ABSTRACT Background Assessment of amyloid‐β (Aβ) burden and associated iron deposition and neurodegeneration is important for Alzheimer's disease (AD) management. Although quantitative susceptibility mapping (QSM) detects iron and myelin changes, conventional metrics suffer from signal cancelation between paramagnetic and diamagnetic components ...
Hiroyuki Tatekawa, Tatsushi Oura, Akitoshi Takeda, Ayako Omori, Natsuko Atsukawa, Shu Matsushita, Daisuke Horiuchi, Hirotaka Takita, Yasuhito Mitsuyama, Yoshihito Ban, Taro Shimono, Josef Pfeuffer, Daiju Ueda, Yoshiaki Itoh, Yukio Miki   +14 more
wiley   +1 more source

NoQSM-net: Combining Convolutional Neural Network With Numerical Optimization Algorithm for Quantitative Susceptibility Mapping Reconstruction

IEEE Access
In gradient echo MRI, quantitative susceptibility mapping (QSM) quantifies the magnetic susceptibility distributions of tissues, which has great potential in detecting brain diseases.
Qianqian Zhang, Yihao Guo, Wufan Chen
doaj   +1 more source

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 to evaluate the early stage of Alzheimer's disease

NeuroImage: Clinical, 2017
The objective of this study was to evaluate susceptibility changes caused by iron accumulation in cognitive normal (CN) elderly, those with amnestic mild cognitive impairment (aMCI), and those with early state AD, and to compare the findings with gray ...
Hyug-Gi Kim, Soonchan Park, Hak Young Rhee, Kyung Mi Lee, Chang-Woo Ryu, Sun Jung Rhee, Soo Yeol Lee, Yi Wang, Geon-Ho Jahng   +8 more
doaj   +1 more source

A Realistic In Silico Brain Phantom for Quantifying Susceptibility Anisotropy‐Induced Error in Susceptibility Separation

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To create a realistic in silico brain phantom for positive and negative magnetic susceptibility that incorporates susceptibility anisotropy, enabling the evaluation of how susceptibility anisotropy influences susceptibility separation algorithm performance.
Daniel Ridani, Benjamin De Leener, Eva Alonso‐Ortiz   +2 more
wiley   +1 more source

A Generalized Approach to Solving Deep Learning‐Based Quantitative Susceptibility Mapping and Quantitative Blood Oxygen Level Dependent Magnitude (QSM + qBOLD or QQ) for Oxygen Extraction Fraction (OEF) Mapping Across Diverse Acquisition Schemes

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose QQ, a recently proposed oxygen extraction fraction (OEF) mapping technique combining quantitative susceptibility mapping (QSM) and quantitative blood oxygen level‐dependent (qBOLD) (QSM + qBOLD = QQ), generates OEF maps noninvasively from a single routine MRI sequence, without requiring vascular challenges used in other OEF approaches.
Tian Qiu, Ada Ally, Arpita Misra, Gloria C. Chiang, Thanh D. Nguyen, Susan A. Gauthier, Shun Zhang, Yi Wang, Junghun Cho   +8 more
wiley   +1 more source

Uncovering the impact of the cardiovascular system on cerebrovascular health using MRI

Experimental Physiology, EarlyView.
Abstract Human cerebrovasculature is finely tuned to enable local changes in blood flow to meet the brain's demands, whilst protecting the brain from systemic changes in blood pressure, both acutely during a heartbeat and chronically over time. This review summarises cerebrovascular structure and function, their role in disease and neurodegeneration ...
Ian D. Driver, Kevin Murphy
wiley   +1 more source

Instant tissue field and magnetic susceptibility mapping from MRI raw phase using Laplacian enhanced deep neural networks

NeuroImage, 2022
Quantitative susceptibility mapping (QSM) is an MRI post-processing technique that produces spatially resolved magnetic susceptibility maps from phase data.
Yang Gao, Zhuang Xiong, Amir Fazlollahi, Peter J Nestor, Viktor Vegh, Fatima Nasrallah, Craig Winter, G. Bruce Pike, Stuart Crozier, Feng Liu, Hongfu Sun   +10 more
doaj   +1 more source