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High‐performance computing MRI simulations
TLDR
JEMRIS, the Jülich Extensible MRI Simulator, which provides an MRI sequence development and simulation environment for the MRI community, is presented and examples of novel simulation results in active fields of MRI research are given.
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Influence of acoustic masking noise in fMRI of the auditory cortex during phonetic discrimination
TLDR
Results indicate that presentation of the stimulus during periods free from scanner noise leads to a more pronounced BOLD response in the superior temporal gyrus covering the primary and secondary auditory cortex.
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Analysis of proton‐density bias corrections based on T1 measurement for robust quantification of water content in the brain at 3 Tesla
TLDR
The longitudinal relaxation time T1 can be combined with an initial guess of the PD to yield the desired PD bias correction, but it is necessary to know whether T1 effects, i.e., any effect contributing to T1 while being independent of tissue hydration, influence the estimated correction.
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Genetic variation in the schizophrenia‐risk gene neuregulin 1 correlates with brain activation and impaired speech production in a verbal fluency task in healthy individuals
TLDR
NRG1 genotype does influence language production on a semantic level in conjunction with the underlying neural systems, in line with results of studies in schizophrenia and may explain some of the cognitive and brain activation variation found in the disorder.
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Disentangling the prefrontal network for rule selection by means of a non‐verbal variant of the Wisconsin Card Sorting Test
TLDR
The prefrontal network underlying executive functions involved in the Wisconsin Card Sorting Test (WCST) is disentangled, providing new evidence for the assumption of differentiated roles of the left and right prefrontal cortex.
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Can the apparent diffusion coefficient be used as a noninvasive parameter to distinguish tumor tissue from peritumoral tissue in cerebral gliomas?
TLDR
To determine whether the apparent diffusion coefficient (ADC) can be used to distinguish between tumor tissue and peritumoral brain tissue in cerebral gliomas, a diffusion coefficient study is conducted.
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Statistical Instability of TBSS Analysis Based on DTI Fitting Algorithm
TLDR
It is demonstrated that the agreement and reliability of TBSS results depend on the applied DTI data processing algorithm, and it is recommended to repeat T BSS analysis using different fitting algorithms, in particular, using on iteratively‐assessed robust estimators, as accurate and more reliable approach in voxel‐based analysis, particularly, for TBSs.
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Resolution modeling in projection space using a factorized multi-block detector response function for PET image reconstruction
TLDR
Evaluation of simulations and measured data demonstrate that the reconstruction with RM yields significantly improved resolutions and reduced mean squared error (MSE) values at different locations of the FOV, compared with reconstruction without RM.
View on IOP Publishing
Microstructural and functional correlates of glutamate concentration in the posterior cingulate cortex
TLDR
A study in a cohort of healthy, male volunteers in which glutamate levels were measured in the posterior cingulate cortex using 1H magnetic resonance spectroscopy at 3T showed that the concentration of glutamate in the PCC had a significant negative correlation with the tissue mean diffusivity in the same area.
View on Wolters Kluwer
Rapid fat suppression for three‐dimensional echo planar imaging with minimized specific absorption rate
To investigate a method for rapid water excitation with minimal radiofrequency power deposition for efficient functional MRI at ultrahigh fields.
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