Results 51 to 60 of about 4,607 (203)

Accelerating quantitative susceptibility and R2* mapping using incoherent undersampling and deep neural network reconstruction

NeuroImage, 2021
Quantitative susceptibility mapping (QSM) and R2* mapping are MRI post-processing methods that quantify tissue magnetic susceptibility and transverse relaxation rate distributions. However, QSM and R2* acquisitions are relatively slow, even with parallel
Yang Gao, Martijn Cloos, Feng Liu, Stuart Crozier, G. Bruce Pike, Hongfu Sun   +5 more
doaj   +1 more source

Multi-modal characterization of rapid anterior hippocampal volume increase associated with aerobic exercise. [PDF]

, 2016
The hippocampus has been shown to demonstrate a remarkable degree of plasticity in response to a variety of tasks and experiences. For example, the size of the human hippocampus has been shown to increase in response to aerobic exercise.
Aarts, Aberg, Adam G. Thomas, American College of Sports Medicine, Anderson-Hanley, Andrea Dennis, Barbier, Belsky, Benedict, Benes, Bernal-Rusiel, Black, Blumenfeld-Katzir, Borg, Charlotte J. Stagg, Deistung, Deoni, Deoni, Duvernoy, Erickson, Fields, Fitzmaurice, Gibson, Glasser, Greve, Haacke, Heidi Johansen-Berg, Helen Dawes, Hickson, Jenkinson, Karp, Kramer, Lankford, Lee, Lerch, Lin, Liu, Lu, Lucy Matthews, Lutti, Mark Jenkinson, Markham, Marques, Martyn Morris, MATLAB, Mosteller, Mueller, Mädler, Nancy B. Rawlings, Overgaard, Pereira, Peter A. Bandettini, Pinheiro, R Core Team, Radloff, Reuter, Sagi, Salomir, Sampaio-Baptista, Scholz, Schweser, Sean Foxley, Shannon H. Kolind, Shmueli, Speck, Stanisz, Stikov, Stouffer, Strange, Stuber, Stüber, Tanaka, Tavor, Thomas, Thomas, Thomas E. Nichols, Toscano-Silva, Van der Borght, van der Kouwe, van der Kouwe, Van Leemput, van Praag, van Praag, van Praag, van Praag, Verbeke, Voelcker-Rehage, Voss, Wake, Wansapura, Wenz, Whittall, Wilson, Winkler, Winkler, Woods, Yeung, Young, Zatorre, Zhang, Zhao   +100 more
core   +1 more source

Brain Nucleus Changes in Cognitive Disorders: Examining By the Quantitative Susceptibility Mapping (QSM) Technique

Iranian Journal of Medical Physics, 2022
Introduction: Iron deposition is vital for damaging neurons and causing different cognitive disorders. Today, using the quantitative susceptibility mapping (QSM) technique, iron deposits in other brain areas can be assessed and measured. This study aimed to identify changes in iron deposition of 12 brain nuclei through different stages of dementia ...
Nikparast, Farzaneh, Shoeibi, Ali, Niroumand, Shabnam, Akbari, Hosein, Zare, Hoda   +4 more
openaire   +2 more sources

Affine transformation edited and refined deep neural network for quantitative susceptibility mapping

NeuroImage, 2023
Deep neural networks have demonstrated great potential in solving dipole inversion for Quantitative Susceptibility Mapping (QSM). However, the performances of most existing deep learning methods drastically degrade with mismatched sequence parameters ...
Zhuang Xiong, Yang Gao, Feng Liu, Hongfu Sun   +3 more
doaj   +1 more source

MRI estimates of brain iron concentration in normal aging using quantitative susceptibility mapping [PDF]

, 2011
Quantifying tissue iron concentration in vivo is instrumental for understanding the role of iron in physiology and in neurological diseases associated with abnormal iron distribution. Herein, we use recently-developed Quantitative Susceptibility Mapping (
Adalsteinsson, Elfar, Bilgic, Berkin, Pfefferbaum, Adolf, Rohlfing, Torsten, Sullivan, Edith V.   +4 more
core   +1 more source

Quantitative Susceptibility Mapping in Parkinson's Disease.

PLoS ONE, 2016
BackgroundQuantitative susceptibility mapping (QSM) and R2* relaxation rate mapping have demonstrated increased iron deposition in the substantia nigra of patients with idiopathic Parkinson's disease (PD).
Christian Langkammer, Lukas Pirpamer, Stephan Seiler, Andreas Deistung, Ferdinand Schweser, Sebastian Franthal, Nina Homayoon, Petra Katschnig-Winter, Mariella Koegl-Wallner, Tamara Pendl, Eva Maria Stoegerer, Karoline Wenzel, Franz Fazekas, Stefan Ropele, Jürgen Rainer Reichenbach, Reinhold Schmidt, Petra Schwingenschuh   +16 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

Fast image reconstruction with L2-regularization [PDF]

, 2013
Purpose We introduce L2-regularized reconstruction algorithms with closed-form solutions that achieve dramatic computational speed-up relative to state of the art L1- and L2-based iterative algorithms while maintaining similar image quality for various ...
Adalsteinsson, Elfar, Bilgic, Berkin, Cauley, Stephen F., Chatnuntawech, Itthi, Fan, Audrey P., Setsompop, Kawin, Wald, Lawrence   +6 more
core   +1 more source

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

Evaluation of Brain Microstructural Alterations in Preschool Autism Spectrum Disorder: A Voxel‐Wise Multimodal MRI Study

Journal of Magnetic Resonance Imaging, EarlyView.
ABSTRACT Background Autism Spectrum Disorder (ASD) presents with early neurodevelopmental alterations in preschool children, yet comprehensive characterization using multimodal quantitative MRI remains limited in this age group. Purpose To investigate voxel‐wise brain microstructural differences in preschool ASD through integrated analysis of cerebral ...
Changhao Wang, Meiying Cheng, Yu Lu, Jinxia Guo, Xueyan Liu, Zhanqi Feng, Shipeng Liu, Xin Zhao   +7 more
wiley   +1 more source