Results 61 to 70 of about 4,607 (203)

Foundations of MRI phase imaging and processing for Quantitative Susceptibility Mapping (QSM)

Zeitschrift für Medizinische Physik, 2016
Quantitative Susceptibility Mapping (QSM) is a novel MRI based technique that relies on estimates of the magnetic field distribution in the tissue under examination. Several sophisticated data processing steps are required to extract the magnetic field distribution from raw MRI phase measurements.
Ferdinand, Schweser, Andreas, Deistung, Jürgen R, Reichenbach   +2 more
openaire   +2 more sources

Clinical Validation of a Fast MRI Method to Evaluate Brain Vascular and Parenchymal Abnormalities in Sturge‐Weber Syndrome

Journal of Magnetic Resonance Imaging, EarlyView.
ABSTRACT Background Sturge‐Weber syndrome (SWS) is a rare neurocutaneous disorder associated with venous capillary malformations, atrophy, and calcifications. Longitudinal imaging is limited by risks of sedation and gadolinium exposure in children.
Scotty G. McKay, Yongsheng Chen, E. Mark Haacke, Yang Xuan, Aimee F. Luat, Csaba Juhász   +5 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

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

Imaging the Centromedian Thalamic Nucleus Using Quantitative Susceptibility Mapping. [PDF]

, 2019
The centromedian (CM) nucleus is an intralaminar thalamic nucleus that is considered as a potentially effective target of deep brain stimulation (DBS) and ablative surgeries for the treatment of multiple neurological and psychiatric disorders.
Gutierrez, Lorenzo, Li, Dianyou, Li, Jun, Li, Yufei, Liu, Chunlei, Sun, Bomin, Wei, Hongjiang, Wu, Yiwen, Xu, Wenying, Zhang, Chencheng   +9 more
core  

Quantifying MRI frequency shifts due to structures with anisotropic magnetic susceptibility using pyrolytic graphite sheet [PDF]

, 2018
Magnetic susceptibility is an important source of contrast in magnetic resonance imaging (MRI), with spatial variations in the susceptibility of tissue affecting both the magnitude and phase of the measured signals.
AL Sukstanskii, B Bender, B Yao, C Denk, C Liu, C Wisnieff, D Fischbach, D Nunes, F Schweser, G Zabow, G Zabow, GC Lee, HA Shute, J Lee, J Lee, J Lounila, JH Duyn, JL Wilson, KM Koch, LK Xie, M Aggarwal, MJ Cronin, P Sati, S Sood, S Wharton, S Wharton, S Wharton, W Li, X Li, Y Nam   +29 more
core   +3 more sources

Quantitative Assessment of Visible Nigrosome‐1 in Patients with Parkinson's Disease

Movement Disorders Clinical Practice, EarlyView.
Abstract Background The nigrosome‐1 (N1) sign on susceptibility‐weighted imaging (SWI) typically disappears in Parkinson's disease (PD), though some patients can show uni−/bilaterally preserved N1. Objective Investigating whether visible nigrosomes in PD patients differ from those of healthy subjects (HC). Methods Forty‐eight PD and 35 HC underwent 3 T‐
Maria Eugenia Caligiuri, Ilaria Chimento, Marida De Maria, Emma Biondetti, Jolanda Buonocore, Valerio Riccardo Aquila, Maria Celeste Bonacci, Emanuele Tinelli, Umberto Sabatini, Aldo Quattrone, Andrea Quattrone   +10 more
wiley   +1 more source

In Vivo Mapping of Catecholaminergic Loss and Iron Deposition in Huntington's Disease

Movement Disorders, EarlyView.
Abstract Background The pathophysiology of Huntington's disease (HD) remains obscure. Magnetic resonance imaging (MRI) can reveal in vivo molecular changes related to disease pathology. Objectives To investigate catecholaminergic neuronal integrity and subcortical brain iron accumulation in HD employing neuromelanin‐sensitive MRI, and quantitative ...
Edoardo R. de Natale, Heather Wilson, Efstratios Karavasilis, Athanasia Liozidou, Chrisoula Kartanou, Georgios Velonakis, Jens Kuhle, Ioannis Zalonis, Georgia Karadima, Leonidas Stefanis, Georgios Koutsis, Marios Politis   +11 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

Temperature Dependence of Paramagnetic Species in the Human Brain Tissue: An X‐Band EPR Study

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Paramagnetic ions are distributed throughout the human brain. The increased accumulation of these metals, such as iron and copper, can induce cellular death and the development of neurological diseases. Electron Paramagnetic Resonance (EPR) is a spectroscopic technique capable of detecting these ions in a given biological sample ...
André Avanzine, José Henrique Monteiro de Azevedo, Martina Huber, Fábio Seiji Otsuka, Maria Concepción García Otaduy, Roberta Diehl Rodriguez, Carlos Ernesto Garrido Salmon   +6 more
wiley   +1 more source