Results 171 to 180 of about 4,607 (203)

Cerebral metabolic rate of oxygen (CMRO₂) mapping with hyperventilation challenge using quantitative susceptibility mapping (QSM)

Magnetic Resonance in Medicine, 2016
PurposeOur objective was to demonstrate the feasibility of using hyperventilation as an efficient vasoconstrictive challenge and prior knowledge as denoising constraints for cerebral metabolic rate of oxygen (CMRO2) mapping based upon quantitative susceptibility mapping (QSM).MethodsThree‐dimensional (3D) multi‐echo gradient echo and arterial spin ...
Jingwei, Zhang, Dong, Zhou, Thanh D, Nguyen, Pascal, Spincemaille, Ajay, Gupta, Yi, Wang   +5 more
openaire   +2 more sources

INR-QSM: unsupervised quantitative susceptibility mapping using implicit neural representation

ISMRM Annual Meeting
This study introduced an unsupervised deep learning-based method for QSM reconstruction using implicit neural representation (INR-QSM), a training databases-free method for high-quality QSM reconstruction. In INR-QSM, the susceptibility map was represented as a continuous function of the spatial coordinates.
Ming Zhang, Yuyao Zhang, Hongjiang Wei
openaire   +1 more source

Inhomogeneity-informed Field-fitting for Quantitative Susceptibility Mapping (if-QSM)

ISMRM Annual Meeting
Motivation: Inhomogeneity in measured multi-gradient echo (mGRE) field data corrupts reconstructions of quantitative susceptibility maps by obscuring the tissue field of interest with strong background field. Goal(s): To extend the voxel spread function (VSF) library implementation to a nonzero phase offset and demonstrate improvements on QSM. Approach:
Alexandra Roberts, Alexey Dimov, Thanh Nguyen, Pascal Spincemaille, Yi Wang   +4 more
openaire   +1 more source

An interleaved sequence for simultaneous magnetic resonance angiography (MRA), susceptibility weighted imaging (SWI) and quantitative susceptibility mapping (QSM)

Magnetic Resonance Imaging, 2018
To image the entire vasculature of the brain with complete suppression of signal from background tissue using a single 3D excitation interleaved rephased/dephased multi-echo gradient echo sequence. This ensures no loss of signal from fast flow and provides co-registered susceptibility weighted images (SWI) and quantitative susceptibility maps (QSM ...
Yongsheng Chen, Saifeng Liu, Sagar Buch, Jiani Hu, Yan Kang, E. Mark Haacke   +5 more
openaire   +2 more sources

Studying psychiatric diseases using quantitative susceptibility mapping (QSM)

Quantitative Susceptibility Mapping (QSM), a sophisticated MRI-based technique for quantifying brain magnetic susceptibility, has emerged as a valuable tool in exploring neurodegenerative diseases and, more recently, psychiatric disorders such as first-episode schizophrenia, depression, anxiety, and stress.
openaire   +1 more source

DF‐QSM: Data Fidelity based Hybrid Approach for Improved Quantitative Susceptibility Mapping of the Brain

NMR in Biomedicine
AbstractQuantitative Susceptibility Mapping (QSM) is an advanced magnetic resonance imaging (MRI) technique to quantify the magnetic susceptibility of the tissue under investigation. Deep learning methods have shown promising results in deconvolving the susceptibility distribution from the measured local field obtained from the MR phase.
Naveen Paluru, Raji Susan Mathew, Phaneendra K. Yalavarthy   +2 more
openaire   +2 more sources

Radiomics for Deep Brain Stimulation outcome prediction using Quantitative Susceptibility Mapping (RadDBS-QSM)

ISMRM Annual Meeting
Motivation: To improve outcome prediction for deep brain stimulation (DBS) surgery using radiomic features on quantitative susceptibility maps (QSMs). Goal(s): To address the inconsistent levodopa challenge test (LCT) prediction for DBS outcomes by describing the target variable, motor symptom improvement, as a weighted sum of QSM radiomic features ...
Alexandra Roberts, Jinwei Zhang, Heejong Kim, Dominick Romano, Sema Akkus, Mert Sabuncu, Jianqi Li, Brian Kopell, Pascal Spincemaille, Yi Wang   +9 more
openaire   +1 more source

Mapping genomic loci implicates genes and synaptic biology in schizophrenia

Nature, 2022
Vassily Trubetskoy, Antonio F Pardiñas, Georgia Panagiotaropoulou   +2 more
exaly  

A systemic approach to mapping participation with low-carbon energy transitions

Nature Energy, 2021
Jason Chilvers, Rob Bellamy, Helen Pallett   +2 more
exaly  

Mapping the genomic diaspora of gastric cancer

Nature Reviews Cancer, 2021
Khay-Guan Yeoh, Patrick Tan
exaly