Results 11 to 20 of about 11,693 (198)

An Integrated QSM-Radiomics Nomogram With Clinical and Imaging Markers for Stratifying Cognitive Impairment in Hypertension. [PDF]

CNS Neurosci Ther
This study developed an integrated nomogram combining QSM‐based radiomics, brain iron deposition, white matter hyperintensity, and clinical markers. This model demonstrated superior performance in stratifying hypertensive cognitive impairment compared to traditional single‐parameter models.
Su Y, Liu T, Dong C, Ge L, Li T, Zhang Z, Zhang Y, Li C, Zhao J, Zheng C, Haacke EM, Wu W, Wang L.   +12 more
europepmc   +2 more sources

Repeatability of Susceptibility Source Separation Methods in Human Brain: A Single-Site Study at 3 T. [PDF]

NMR Biomed
Repeatability of three susceptibility source separation algorithms (χ‐Separation, χ‐SepNet, and APART) was investigated using 3‐T scan–rescan data from 21 healthy subjects. The separation methods showed moderate to good repeatability in most brain regions; however, results were greatly influenced by the algorithm used, with better performance achieved ...
Naji N, Seres P, Moran G, Beaulieu C, Wilman AH.   +4 more
europepmc   +2 more sources

Quicksilver Scalable Multicast (QSM) [PDF]

2008 Seventh IEEE International Symposium on Network Computing and Applications, 2008
QSM is a multicast engine designed to support a style of distributed programming in which application objects are replicated among clients and updated via multicast. The model requires platforms that scale in dimensions previously unexplored; in particular, to large numbers of multicast groups. Prior systems werenpsilat optimized for such scenarios and
Krzysztof Ostrowski, Ken Birman, Danny Dolev   +2 more
openaire   +1 more source

Quantitative Susceptibility Mapping in Skull Base Chordoma: In Silico Analysis and In Vivo Application Towards Indirect Hypoxia Assessment. [PDF]

Magn Reson Med
ABSTRACT Purpose To evaluate quantitative susceptibility mapping (QSM) beyond the brain through realistic simulations and to explore preliminary evidence that may be indicative of hypoxia in skull base chordomas (SBC). Methods Each step of the QSM pipeline was optimized within an in silico framework consisting of (i) phase unwrapping, (ii) background ...
Fenech P, Morelli L, Parrella G, Imparato S, Iannalfi A, Lillo S, Orlandi E, Baroni G, Paganelli C.   +8 more
europepmc   +2 more sources

Iterative Restoration of the Fringe Phase (REFRASE) for QSM [PDF]

Frontiers in Neuroscience, 2021
In quantitative susceptibility mapping (QSM), reconstructed results can be critically biased by misinterpreted or missing phase data near the edges of the brain support originating from the non-local relationship between field and susceptibility. These data either have to be excluded or corrected before further processing can take place.
Johannes Lindemeyer, Wieland A. Worthoff, Aliaksandra Shymanskaya, N. Jon Shah, N. Jon Shah, N. Jon Shah, N. Jon Shah   +6 more
openaire   +5 more sources

Investigating the effect of flow compensation and quantitative susceptibility mapping method on the accuracy of venous susceptibility measurement

NeuroImage, 2021
Quantitative susceptibility mapping (QSM) is a promising non-invasive method for obtaining information relating to oxygen metabolism. However, the optimal acquisition sequence and QSM reconstruction method for reliable venous susceptibility measurements ...
Ronja C. Berg, Christine Preibisch, David L. Thomas, Karin Shmueli, Emma Biondetti   +4 more
doaj   +1 more source

QSM Reconstruction Challenge 2.0: Design and Report of Results [PDF]

Magnetic Resonance in Medicine, 2020
AbstractPurposeThe aim of the second quantitative susceptibility mapping (QSM) reconstruction challenge (Oct 2019, Seoul, Korea) was to test the accuracy of QSM dipole inversion algorithms in simulated brain data.MethodsA two-stage design was chosen for this challenge.
Berkin Bilgic, Christian Langkammer, José P. Marques, Jakob Meineke, Carlos Milovic, Ferdinand Schweser   +5 more
openaire   +4 more sources

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

HFP‐QSMGAN: QSM from homodyne‐filtered phase images

Magnetic Resonance in Medicine, 2022
PurposeHomodyne filtering is a standard preprocessing step in the estimation of SWI. Unfortunately, SWI is not quantitative, and QSM cannot be accurately estimated from filtered phase images. Compared with gradient‐echo sequences suitable for computing QSM, SWI is more readily available and is often the only susceptibility‐sensitive sequence acquired ...
Vincent Beliveau, Christoph Birkl, Ambra Stefani, Elke R. Gizewski, Christoph Scherfler   +4 more
openaire   +2 more sources

Brain iron assessment in patients with First-episode schizophrenia using quantitative susceptibility mapping

NeuroImage: Clinical, 2021
Purpose: Decreased serum ferritin level was recently found in schizophrenia. Whether the brain iron concentration in schizophrenia exists abnormality is of research significance.
Man Xu, Yihao Guo, Junying Cheng, Kangkang Xue, Meng Yang, Xueqin Song, Yanqiu Feng, Jingliang Cheng   +7 more
doaj   +1 more source