Results 31 to 40 of about 2,779 (160)

Quantitative Susceptibility Mapping: Translating an Investigative Research Tool into High Volume Clinical Diagnostic Imaging

Diagnostics, 2022
Quantitative susceptibility mapping (QSM) is an MRI-based technique for iron quantification of targeted tissue. QSM provides information relevant to clinicians in a broad range of diagnostic contexts, including sickle cell disease, inflammatory ...
Matthew T. Borzage, Eamon K. Doyle, Chia-Shang J. Liu, Marvin D. Nelson, Stefan Blüml, John C. Wood, Benita Tamrazi   +6 more
doaj   +1 more source

Quantitative Susceptibility Mapping-Based Microscopy of Magnetic Resonance Venography (QSM-mMRV) for In Vivo Morphologically and Functionally Assessing Cerebromicrovasculature in Rat Stroke Model.

PLoS ONE, 2016
Abnormal cerebral oxygenation and vessel structure is a crucial feature of stroke. An imaging method with structural and functional information is necessary for diagnosis of stroke.
Meng-Chi Hsieh, Ching-Yi Tsai, Min-Chiao Liao, Jenq-Lin Yang, Chia-Hao Su, Jyh-Horng Chen   +5 more
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Quantitative mapping of cerebral metabolic rate of oxygen (CMRO₂) using quantitative susceptibility mapping (QSM) [PDF]

Magnetic Resonance in Medicine, 2014
PurposeTo quantitatively map cerebral metabolic rate of oxygen ( ) and oxygen extraction fraction ( ) in human brains using quantitative susceptibility mapping (QSM) and arterial spin labeling‐measured cerebral blood flow (CBF) before and after caffeine vasoconstriction.MethodsUsing the multiecho, three‐dimensional gradient echo sequence and an oral ...
Jingwei, Zhang, Tian, Liu, Ajay, Gupta, Pascal, Spincemaille, Thanh D, Nguyen, Yi, Wang   +5 more
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Quantitative susceptibility mapping (QSM): Decoding MRI data for a tissue magnetic biomarker [PDF]

Magnetic Resonance in Medicine, 2014
In MRI, the main magnetic field polarizes the electron cloud of a molecule, generating a chemical shift for observer protons within the molecule and a magnetic susceptibility inhomogeneity field for observer protons outside the molecule. The number of water protons surrounding a molecule for detecting its magnetic susceptibility is vastly greater than ...
Wang, Yi, Liu, Tian
openaire   +2 more sources

Evaluation of iron deposition in brain basal ganglia of patients with Parkinson's disease using quantitative susceptibility mapping

European Journal of Radiology Open, 2019
Aim of the study: Parkinson's disease is associated with iron deposition in the brain. The QSM (quantitative susceptibility mapping) is more sensitive than T2-weighted imaging, T2* and R2.
Vahid Shahmaei, Fariborz Faeghi, Ahmad Mohammadbeigi, Hasan Hashemi, Farzad Ashrafi   +4 more
doaj   +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

Exploring linearity of deep neural network trained QSM: QSMnet+

NeuroImage, 2020
Recently, deep neural network-powered quantitative susceptibility mapping (QSM), QSMnet, successfully performed ill-conditioned dipole inversion in QSM and generated high-quality susceptibility maps.
Woojin Jung, Jaeyeon Yoon, Sooyeon Ji, Joon Yul Choi, Jae Myung Kim, Yoonho Nam, Eung Yeop Kim, Jongho Lee   +7 more
doaj   +1 more source

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
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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

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
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