Simulations of the effect of diffusion on asymmetric spin echo based quantitative BOLD: An investigation of the origin of deoxygenated blood volume overestimation.

abstract：:Gradient echo techniques are often hampered by signal dephasing due to macroscopic phase perturbations because of system imperfections (shimming) or object induced perturbations of the magnetic field (hemorrhagic lesions, calcified tissue, air-tissue interfaces). Many techniques have been proposed to reduce the effect...

journal_title：NeuroImage

authors： de Leeuw H,Bakker CJ

更新日期：2012-03-01 00:00:00

abstract：:Thought disorder is one of the primary symptoms in schizophrenia, yet the neural correlates and related semantic processing abnormalities remain unclear. We aimed to investigate the relationship between functional prefrontal abnormalities and thought disorder in schizophrenia using 2 types of verbal fluency tasks: the...

journal_title：NeuroImage

authors： Marumo K,Takizawa R,Kinou M,Kawasaki S,Kawakubo Y,Fukuda M,Kasai K

更新日期：2014-01-15 00:00:00

abstract：:The main objective of this work was to study the functional markers of the clinical response to cholecystokinin tetrapeptide (CCK-4). Twelve healthy male subjects were challenged with CCK-4 and simultaneously underwent functional magnetic resonance imaging (fMRI) recording. Since anticipatory anxiety (AA) is an intrin...

journal_title：NeuroImage

authors： Schunck T,Erb G,Mathis A,Gilles C,Namer IJ,Hode Y,Demaziere A,Luthringer R,Macher JP

更新日期：2006-07-01 00:00:00

abstract：BACKGROUND:Myelin specific imaging techniques to characterize white matter in demyelinating diseases such as multiple sclerosis (MS) have become an area of increasing focus. Gray matter myelination is an important marker of cortical microstructure, and its impairment is relevant in progressive MS. However, its assessme...

journal_title：NeuroImage

authors： Munsch F,Varma G,Taso M,Girard O,Guidon A,Duhamel G,Alsop DC

更新日期：2021-01-15 00:00:00

abstract：:Breathing rate and depth influence the concentration of carbon dioxide in the blood, altering cerebral blood flow and thus functional magnetic resonance imaging (fMRI) signals. Such respiratory fluctuations can have substantial influence in studies of fMRI signal covariance in subjects at rest, the so-called "resting ...

journal_title：NeuroImage

authors： Power JD,Lynch CJ,Dubin MJ,Silver BM,Martin A,Jones RM

更新日期：2020-01-01 00:00:00

abstract：:We investigated neural correlates of retrieval success for music memory using event-related functional magnetic resonance imaging. To minimize the interference from MRI scan noise, we used sparse temporal sampling technique. Newly composed music materials were employed as stimuli, which enabled us to detect regions in...

journal_title：NeuroImage

authors： Watanabe T,Yagishita S,Kikyo H

更新日期：2008-01-01 00:00:00

abstract：PURPOSE:Mild cognitive impairment (MCI) is thought to be the prodromal phase to Alzheimer's disease (AD). We analyzed patterns of gray matter (GM) loss to examine what characterizes MCI and what determines the difference with AD. MATERIALS AND METHODS:Thirty-three subjects with AD, 14 normal elderly controls (NCLR), a...

journal_title：NeuroImage

authors： Karas GB,Scheltens P,Rombouts SA,Visser PJ,van Schijndel RA,Fox NC,Barkhof F

更新日期：2004-10-01 00:00:00

abstract：:The present study examined intrahemispheric functional connectivity during rest and dichotic listening in 8 male and 9 female healthy young adults measured with magnetoencephalography (MEG). Generalized synchronization within the separate hemispheres was estimated by means of the synchronization likelihood that is sen...

journal_title：NeuroImage

authors： Gootjes L,Bouma A,Van Strien JW,Scheltens P,Stam CJ

更新日期：2006-03-01 00:00:00

abstract：:Blood-oxygen-level-dependent (BOLD) resting-state functional MRI (rsfMRI) has emerged as a valuable tool to map complex brain-wide functional networks, predict cognitive performance and identify biomarkers for neurological diseases. However, interpreting these findings poses challenges, as the neural basis of rsfMRI c...

journal_title：NeuroImage

authors： Wang X,Leong ATL,Chan RW,Liu Y,Wu EX

更新日期：2019-11-01 00:00:00

abstract：:According to recent research on language comprehension, the semantic features of a text are not the only determinants of whether incoming information is understood as consistent. Listeners' pre-existing affective states play a crucial role as well. The current fMRI experiment examines the effects of happy and sad mood...

journal_title：NeuroImage

authors： Egidi G,Caramazza A

更新日期：2014-12-01 00:00:00

abstract：:A new method is developed for analyzing the time-varying spectral content of EEG data collected in cognitive tasks. The goal is to extract and summarize the most salient features of numerical results, which span space, time, frequency, task conditions, and multiple subjects. Direct generalization of an established app...

journal_title：NeuroImage

authors： Ferree TC,Brier MR,Hart J Jr,Kraut MA

更新日期：2009-03-01 00:00:00

abstract：:Demanding cognitive tasks are sometimes carried out under stressful conditions. Several studies indicate that whereas severe stress impairs performance, moderate stress can enhance cognitive performance. In this study, we investigated how moderate stress influences the neural systems supporting working memory. We embe...

journal_title：NeuroImage

authors： Cousijn H,Rijpkema M,Qin S,van Wingen GA,Fernández G

更新日期：2012-01-16 00:00:00

abstract：:Preterm birth and very low birth weight (VLBW, ≤1500 g) are worldwide problems that burden survivors with lifelong cognitive, psychological, and physical challenges. In this multimodal structural magnetic resonance imaging (MRI) and diffusion MRI (dMRI) study, we investigated differences in subcortical brain volumes a...

journal_title：NeuroImage

authors： Sølsnes AE,Sripada K,Yendiki A,Bjuland KJ,Østgård HF,Aanes S,Grunewaldt KH,Løhaugen GC,Eikenes L,Håberg AK,Rimol LM,Skranes J

更新日期：2016-04-15 00:00:00

abstract：:As the EEG inverse problem does not have a unique solution, the sources reconstructed from EEG and their connectivity properties depend on forward and inverse modeling parameters such as the choice of an anatomical template and electrical model, prior assumptions on the sources, and further implementational details. I...

journal_title：NeuroImage

authors： Mahjoory K,Nikulin VV,Botrel L,Linkenkaer-Hansen K,Fato MM,Haufe S

更新日期：2017-05-15 00:00:00

abstract：:β-amyloid (Aβ) and tau pathology become increasingly prevalent with age, however, the spatial relationship between the two pathologies remains unknown. We examined local (same region) and non-local (different region) associations between these 2 aggregated proteins in 46 normal older adults using [18F]AV-1451 (for tau...

journal_title：NeuroImage

authors： Lockhart SN,Schöll M,Baker SL,Ayakta N,Swinnerton KN,Bell RK,Mellinger TJ,Shah VD,O'Neil JP,Janabi M,Jagust WJ

更新日期：2017-04-15 00:00:00

abstract：:In this work we investigate the effects of echo planar imaging (EPI) distortions on diffusion tensor imaging (DTI) based fiber tractography results. We propose a simple experimental framework that would enable assessing the effects of EPI distortions on the accuracy and reproducibility of fiber tractography from a pil...

journal_title：NeuroImage

authors： Irfanoglu MO,Walker L,Sarlls J,Marenco S,Pierpaoli C

更新日期：2012-05-15 00:00:00

abstract：:Brain white matter tissue composition can be quantified using Diffusion Tensor Imaging (DTI) and Magnetization Transfer Imaging (MTI). Fractional Anisotropy (FA), derived from DTI, indexes the integrity, density and organization of axons. Magnetization Transfer Ratio (MTR), derived from MTI, indexes to the presence of...

journal_title：NeuroImage

authors： Kang X,Herron TJ,Woods DL

更新日期：2011-06-15 00:00:00

abstract：:Neocortical cholinergic afferents are proposed to influence both selective attention and emotional processing. In a study of healthy adults we used event-related fMRI while orthogonally manipulating attention and emotionality to examine regions showing effects of cholinergic modulation by the anticholinesterase physos...

journal_title：NeuroImage

authors： Bentley P,Vuilleumier P,Thiel CM,Driver J,Dolan RJ

更新日期：2003-09-01 00:00:00

abstract：AIM:In order to relate brain structural abnormalities to clinical features of Angelman Syndrome (AS), we determined the locations of abnormal regional white matter architecture in AS children using a sensitive and objective whole brain approach to analyze diffusion tensor imaging (DTI) color-coded orientation maps. ME...

journal_title：NeuroImage

authors： Tiwari VN,Jeong JW,Wilson BJ,Behen ME,Chugani HT,Sundaram SK

更新日期：2012-01-02 00:00:00

abstract：:When studying complex cognitive tasks using functional magnetic resonance imaging (fMRI) one often encounters weak signal responses. These weak responses are corrupted by noise and artifacts of various sources. Preprocessing of the raw data before the application of test statistics helps to extract the signal and can ...

journal_title：NeuroImage

authors： Kruggel F,von Cramon DY,Descombes X

更新日期：1999-11-01 00:00:00

abstract：:Sulcal pits, the locally deepest points in sulci of the highly convoluted and variable cerebral cortex, are found to be spatially consistent across human adult individuals. It is suggested that sulcal pits are genetically controlled and have close relationships with functional areas. To date, the existing imaging stud...

journal_title：NeuroImage

authors： Meng Y,Li G,Lin W,Gilmore JH,Shen D

更新日期：2014-10-15 00:00:00

abstract：:Previous studies suggest that spontaneous fluctuations in the resting-state fMRI (RS-fMRI) signal may reflect fluctuations in transverse relaxation time (T(2)(*)) rather than spin density (S(0)). However, such S(0) and T(2)(*) features have not been well characterized. In this study, spatial and spectral characteristi...

journal_title：NeuroImage

authors： Wu CW,Gu H,Zou Q,Lu H,Stein EA,Yang Y

更新日期：2012-02-15 00:00:00

abstract：:We monitored regional cerebral activity with BOLD fMRI during acquisition of a novel semantic category and subsequent categorization of test stimuli by a rule-based strategy or a similarity-based strategy. We observed different patterns of activation in direct comparisons of rule- and similarity-based categorization. ...

journal_title：NeuroImage

authors： Koenig P,Smith EE,Glosser G,DeVita C,Moore P,McMillan C,Gee J,Grossman M

更新日期：2005-01-15 00:00:00

abstract：:Diffuse optical tomography is most accurate when an individual's MRI data can be used as a spatial prior for image reconstruction and for visualization of the resulting images of changes in oxy- and deoxy-hemoglobin concentration. As this necessitates an MRI scan to be performed for each study, which undermines many o...

journal_title：NeuroImage

authors： Brigadoi S,Aljabar P,Kuklisova-Murgasova M,Arridge SR,Cooper RJ

更新日期：2014-10-15 00:00:00

abstract：:Multiscale entropy (MSE) analysis is a novel entropy-based approach for measuring dynamical complexity in physiological systems over a range of temporal scales. To evaluate this analytic approach as an aid to elucidating the pathophysiologic mechanisms in schizophrenia, we examined MSE in EEG activity in drug-naive sc...

journal_title：NeuroImage

authors： Takahashi T,Cho RY,Mizuno T,Kikuchi M,Murata T,Takahashi K,Wada Y

更新日期：2010-05-15 00:00:00

abstract：BACKGROUND:Quantitative MRI (qMRI) techniques allow assessing cerebral tissue properties. However, previous studies on the accuracy of quantitative T1 and T2 mapping reported a scanner model bias of up to 10% for T1 and up to 23% for T2. Such differences would render multi-centre qMRI studies difficult and raise fundam...

journal_title：NeuroImage

authors： Gracien RM,Maiworm M,Brüche N,Shrestha M,Nöth U,Hattingen E,Wagner M,Deichmann R

更新日期：2020-02-15 00:00:00

abstract：:In this work we treat fMRI data analysis as a spatiotemporal system identification problem and address issues of model formulation, estimation, and model comparison. We present a new model that includes a physiologically based hemodynamic response and an empirically derived low-frequency noise model. We introduce an e...

journal_title：NeuroImage

authors： Purdon PL,Solo V,Weisskoff RM,Brown EN

更新日期：2001-10-01 00:00:00

abstract：:The core concept within the field of brain mapping is the use of a standardized, or "stereotaxic", 3D coordinate frame for data analysis and reporting of findings from neuroimaging experiments. This simple construct allows brain researchers to combine data from many subjects such that group-averaged signals, be they s...

journal_title：NeuroImage

authors： Evans AC,Janke AL,Collins DL,Baillet S

更新日期：2012-08-15 00:00:00

abstract：:Small-world organization is known to be a robust and consistent network architecture, and is a hallmark of the structurally and functionally connected human brain. However, it remains unknown if the same organization is present in directed influence brain networks whose connectivity is inferred by the transfer of info...

journal_title：NeuroImage

authors： Liao W,Ding J,Marinazzo D,Xu Q,Wang Z,Yuan C,Zhang Z,Lu G,Chen H

更新日期：2011-02-14 00:00:00

abstract：:One of the most compelling challenges for modern neuroscience is the influence of awareness on behavior. We studied prefrontal correlates of conscious and subconscious motor adjustments to changing auditory rhythms using regional cerebral blood flow measurements. At a subconscious level, movement adjustments were perf...

journal_title：NeuroImage

authors： Stephan KM,Thaut MH,Wunderlich G,Schicks W,Tian B,Tellmann L,Schmitz T,Herzog H,McIntosh GC,Seitz RJ,Hömberg V

更新日期：2002-02-01 00:00:00