Results 181 to 190 of about 6,791 (211)

Use of quantitative susceptibility mapping (QSM) in progressive multifocal leukoencephalopathy

Journal of Neuroradiology, 2016
Progressive multifocal leukoencephalopathy (PML) is an opportunistic demyelinating encephalopathy related to JC virus. Its characteristics on conventional brain MRI are well known and are important for the diagnosis.To analyze SWI hypointensities recently described in U-fibers and cortex adjacent to the white matter lesions of PML.Prospective study ...
C, Carra-Dalliere, N, Menjot de Champfleur, J, Deverdun, X, Ayrignac, E, Nerrant, A, Makinson, M L, Casanova, P, Labauge   +7 more
openaire   +2 more sources

Characterization of Cardiac Quantitative Susceptibility Mapping (QSM)

ISMRM Annual Meeting
Cardiac Quantitative Susceptibility Mapping (QSM) is a promising technique for the evaluation of iron levels in the myocardium, particularly after a hemorrhagic infarction. In this abstract, we validate the accuracy of our QSM acquisition and reconstruction procedure in phantom experiments, and characterize its precision and repeatability in the ...
Andrew Tyler, Li Huang, Radhouene Neji, Ronald Mooiweer, Pier-Giorgio Masci, Sébastien Roujol   +5 more
openaire   +1 more source

A quantum similarity matrix (QSM) Aufbau procedure

Journal of Mathematical Chemistry, 2007
An Aufbau recursive algorithm, leading to the construction of molecular Quantum similarity matrices (QSM) with positive definite structure is described. As a consequence, Molecular Quantum Similarity measures optimization has to be restricted by a recursive constraint, related to the Euclidian norm of the QSM column elements in Quantum Object density ...
openaire   +1 more source

Decompose Quantitative Susceptibility Mapping (QSM) to Sub-Voxel Diamagnetic and Paramagnetic Components Based on Gradient-Echo MRI Data

NeuroImage, 2021
Chunlei Liu, Nan-Jie Gong, Maria Concepcion Garcia Otaduy   +2 more
exaly  

Practical Considerations for DECOMPOSE-QSM in the Human Brain

ISMRM Annual Meeting
Motivation: DECOMPOSE-QSM is a susceptibility source separation method that has the potential for many clinical applications. However, its sensitivity to input QSM acquisition parameters and reconstruction method, and its repeatability are unknown. Goal(s): To investigate the performance and repeatability of DECOMPOSE-QSM with QSM calculated using ...
Patrick Fuchs, Jingjia Chen, Chunlei Liu, Karin Shmueli   +3 more
openaire   +1 more source

Investigating the Effect of Oblique Image Acquisition on the Accuracy of QSM and a Robust Tilt Correction Method

Magnetic Resonance in Medicine, 2023
Karin Shmueli, Anita Karsa, John S Thornton   +2 more
exaly  

Simultaneous QSM and Metabolic Imaging of the Brain Using SPICE: Further Improvements in Data Acquisition and Processing

Magnetic Resonance in Medicine, 2021
Yao Li, Bradley P Sutton, Rong Guo
exaly  

QSM as a new powerful tool for clinical practice in neuroimaging

Journal of Neuroradiology, 2021
N, Pyatigorskaya, M D, Santin
openaire   +2 more sources

QSM: A general purpose shared-memory model for parallel computation

1997
We describe a general-purpose shared-memory model for parallel computation, called the QSM [21], which provides a high-level shared-memory abstraction for parallel algorithm design, as well as the ability to be emulated in an effective manner on the BSP, a lower-level, distributed-memory model.
openaire   +2 more sources

APART-QSM: An Improved Sub-Voxel Quantitative Susceptibility Mapping for Susceptibility Source Separation Using an Iterative Data Fitting Method

NeuroImage, 2023
Yuyao Zhang, Qiangqiang Liu, Jie Feng
exaly