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Rapid whole-brain resting-state fMRI at 3 T: Efficiency-optimized three-dimensional EPI versus repetition time-matched simultaneous-multi-slice EPI

Rüdiger Stirnberg, Willem Huijbers, Daniel Brenner, Benedikt A. Poser, Monique Breteler, Tony Stöcker
2017 NeuroImage  
., & Stöcker, T. (2017) . Rapid wholebrain resting-state fMRI at 3 T: Efficiency-optimized three-dimensional EPI versus repetition time-matched simultaneous-multi-slice EPI.  ...  identical spatial and temporal resolution for whole-brain resting-state fMRI at 3 T.  ...  Rapid whole-brain resting-state fMRI at 3 T: Efficiency-optimized three-dimensional EPI versus repetition time-matched simultaneous-multi-slice EPI Introduction Recent advances in undersampled multiband  ... 
doi:10.1016/j.neuroimage.2017.08.031 pmid:28923276 fatcat:2r3dzcn2pvcsthojnttnratfvq

Multiband multislice GE-EPI at 7 tesla, with 16-fold acceleration using partial parallel imaging with application to high spatial and temporal whole-brain fMRI

Steen Moeller, Essa Yacoub, Cheryl A. Olman, Edward Auerbach, John Strupp, Noam Harel, Kâmil Uğurbil
2010 Magnetic Resonance in Medicine  
Robust, whole-brain functional mapping at 7 T, with 2 × 2 × 2mm 3 (pulse repetition time 1.25 sec) and 1 × 1 × 2mm 3 (pulse repetition time 1.5 sec) resolutions, covering fields of view of 256 × 256 ×  ...  Echo planar imaging with simultaneous acquisition of four coronal slices separated by 44mm and simultaneous 4-fold phase-encoding undersampling, resulting in 16-fold acceleration and up to 16-fold maximal  ...  , highly accelerated, highresolution, whole-brain coverage with gradient echo (GE)-EPI at 7 T.  ... 
doi:10.1002/mrm.22361 pmid:20432285 pmcid:PMC2906244 fatcat:67sdvdynxrftlik4su7iinp2f4

Multiplexed Echo Planar Imaging for Sub-Second Whole Brain FMRI and Fast Diffusion Imaging

David A. Feinberg, Steen Moeller, Stephen M. Smith, Edward Auerbach, Sudhir Ramanna, Matt F. Glasser, Karla L. Miller, Kamil Ugurbil, Essa Yacoub, Pedro Antonio Valdes-Sosa
2010 PLoS ONE  
EPI generates a single 2D image in a fraction of a second; however, it requires 2-3 seconds to acquire multi-slice whole brain coverage for fMRI and even longer for diffusion imaging.  ...  This resulted in an unprecedented reduction in EPI scan time for whole brain fMRI performed at 3 Tesla, permitting TRs of 400 ms and 800 ms compared to a more conventional 2.5 sec TR, and 2-4 times reductions  ...  (PDF) Table S1 The minimum repetition times (TRs) for acquiring whole brain imaging with the specified M-EPI sequence.  ... 
doi:10.1371/journal.pone.0015710 pmid:21187930 pmcid:PMC3004955 fatcat:qotvz5pnsrhdrkvmvdonfusooa

Pushing spatial and temporal resolution for functional and diffusion MRI in the Human Connectome Project

Kamil Uğurbil, Junqian Xu, Edward J. Auerbach, Steen Moeller, An T. Vu, Julio M. Duarte-Carvajalino, Christophe Lenglet, Xiaoping Wu, Sebastian Schmitter, Pierre Francois Van de Moortele, John Strupp, Guillermo Sapiro (+15 others)
2013 NeuroImage  
We describe technical improvements and optimization of these methods as well as instrumental choices that impact speed of acquisition of fMRI and dMRI images at 3T, leading to whole brain coverage with  ...  These are: 1) resting state functional MR imaging (rfMRI) which uses correlations in the temporal fluctuations in an fMRI time series to deduce 'functional connectivity'; 2) diffusion imaging (dMRI), which  ...  Moeller at al 43, 44 was the first to demonstrate rapid, high-resolution, whole brain coverage with Multiband EPI in an application that had wide spread use, namely fMRI, where such rapid volume coverage  ... 
doi:10.1016/j.neuroimage.2013.05.012 pmid:23702417 pmcid:PMC3740184 fatcat:wajdgqkztvg43eyxxovlxlshky

Ultra-high spatial resolution BOLD fMRI in humans using combined segmented-accelerated VFA-FLEET with a recursive RF pulse design [article]

Avery J.L. Berman
2020 Magnetic Resonance in Medicine   pre-print
To counteract the increased repetition time from segmentation, simultaneous multi-slice VFA-FLEET-SLR was demonstrated using RF-encoded controlled aliasing.  ...  Results The temporal stability of VFA-FLEET-SLR was compared against conventional-segmented EPI and VFA-FLEET-Sinc at 3 T and 7 T.  ...  Group-average whole-brain tSNR and skewness from the three segmentation variants at 3 T and 7 T are plotted in Figure 5 . At 3 T, the group-averaged whole-brain tSNR was highest for background.  ... 
doi:10.1002/mrm.28415 pmid:32705723 pmcid:PMC7722122 arXiv:2007.01950v1 fatcat:wund2pixifdppjfmvs6jucyd6m

Optimization of simultaneous multislice EPI for concurrent functional perfusion and BOLD signal measurements at 7T

Dimo Ivanov, Benedikt A Poser, Laurentius Huber, Josef Pfeuffer, Kâmil Uludağ
2016 Magnetic Resonance in Medicine  
Purpose: To overcome limitations of previous ultra-high-field arterial spin labeling (ASL) techniques concerning temporal resolution and brain coverage by utilizing the simultaneous multi-slice (SMS) approach  ...  The proposed approach utilizes an SMS echo-planar imaging (EPI) readout to efficiently achieve large brain coverage.  ...  Simultaneous multi-slice imaging (see review in (15) ) has demonstrated, for example, improvements for the detection of resting-state networks (7) and dramatically reduced imaging time in diffusion-weighted  ... 
doi:10.1002/mrm.26351 pmid:27465273 pmcid:PMC5484334 fatcat:fategcfu2vf5dkfhoew6inlafq

Multi-echo fMRI: A review of applications in fMRI denoising and analysis of BOLD signals

Prantik Kundu, Valerie Voon, Priti Balchandani, Michael V. Lombardo, Benedikt A. Poser, Peter A. Bandettini
2017 NeuroImage  
By acquiring multiple echo images per slice, the ME approach allows T 2 * decay to be modeled at every voxel at every time point.  ...  Applications include removing motion artifacts in resting state data at subject and group level.  ...  Ed Bullmore and Souheil Inati for many important discussions on statistical and biophysical modelling of multi-echo fMRI signals.  ... 
doi:10.1016/j.neuroimage.2017.03.033 pmid:28363836 fatcat:n6mkrdv535gqfnf6nuu2nfzaxy

Resting State fMRI: Going Through the Motions

Sanam Maknojia, Nathan W. Churchill, Tom A. Schweizer, S. J. Graham
2019 Frontiers in Neuroscience  
Resting state functional magnetic resonance imaging (rs-fMRI) has become an indispensable tool in neuroscience research.  ...  Although not commonly adopted at present, "real-time" correction methods are emerging that can be combined with retrospective methods and that promise better correction and increased rs-fMRI signal sensitivity  ...  Two recent reports have indicated that this problem may be relevant for rs-fMRI at 3 T in a 16-channel coil geometry, for a conventional EPI k-space readout (Faraji-Dana et al., 2016a) as well as for  ... 
doi:10.3389/fnins.2019.00825 pmid:31456656 pmcid:PMC6700228 fatcat:yve3qt2fbngmthm4wsrbj34cni

Imaging at ultrahigh magnetic fields: History, challenges, and solutions

Kamil Uğurbil
2018 NeuroImage  
, rapid progress was made in imaging and spectroscopy studies of humans at 4 T and animal models at 9.4 T, leading to the introduction of 7 T and higher magnetic fields for human investigation at about  ...  With these technologies and improvements in instrumentation and imaging methods, today ultrahigh fields have provided unprecedented gains in imaging of brain function and anatomy, and started to make inroads  ...  simultaneous multi-slice multiband excitation .  ... 
doi:10.1016/j.neuroimage.2017.07.007 pmid:28698108 pmcid:PMC5758441 fatcat:xuo6bzgoq5bznleo3g4xna4wci

Principles of functional magnetic resonance imaging: application to auditory neuroscience

A T Cacace, T Tasciyan, J P Cousins
2000 Journal of american academy of audiology  
Being able to localize and study human brain function in vivo, in relatively high resolution and in a noninvasive manner, makes this a technique of unparalleled importance.  ...  We introduce functional magnetic resonance imaging (fMRI) by providing an overview of the studies of different sensory systems in response to modality-specific stimuli, followed by an outline of other  ...  Whereas a single GRE slice can be acquired in 3 to 4 sec, multiple EPI acquisitions can be completed in 1 sec.  ... 
pmid:10821504 fatcat:7xjf3r75cnhe3bcuvbjx35vwmi

Estimating the intrinsic dimension in fMRI space via dataset fractal analysis - Counting the `cpu cores' of the human brain [article]

Harris V. Georgiou
2014 arXiv   pre-print
Specifically, the fMRI signal is treated as a multi-dimensional data space and its intrinsic 'complexity' is studied via dataset fractal analysis and blind-source separation (BSS) methods.  ...  Using fMRI as the main modality, the human brain activity is investigated through a purely data-driven signal processing and dimensionality analysis approach.  ...  . of Athens (NKUA/UoA), for their collaboration in related projects and the useful discussions for works-in-progress in fMRI analysis and sparse modeling.  ... 
arXiv:1410.7100v1 fatcat:kimuzreot5ehbgp4wvchvyl6kq

A multivariate distance-based analytic framework for connectome-wide association studies

Zarrar Shehzad, Clare Kelly, Philip T. Reiss, R. Cameron Craddock, John W. Emerson, Katie McMahon, David A. Copland, F. Xavier Castellanos, Michael P. Milham
2014 NeuroImage  
Using resting state fMRI data, we demonstrate the utility of our analytic framework by identifying significant connectivity-phenotype relationships for fullscale IQ and assessing their overlap with existent  ...  the connectome; the approach identifies voxels whose whole-brain connectivity patterns vary significantly with a phenotypic variable.  ...  Resting-state fMRI data were collected with a multi-echo EPI sequence (180 time points; repetition time [TR] , 2000 ms; effective echo time [TE] = 33ms; flip angle, 90°; 33 slices; voxel size, 3×3×4mm  ... 
doi:10.1016/j.neuroimage.2014.02.024 pmid:24583255 pmcid:PMC4138049 fatcat:awsilxdbkjf6podlgn7apz6c6u

Comparing test-retest reliability of dynamic functional connectivity methods

Ann S. Choe, Mary Beth Nebel, Anita D. Barber, Jessica R. Cohen, Yuting Xu, James J. Pekar, Brian Caffo, Martin A. Lindquist
2017 NeuroImage  
Due to the dynamic, condition-dependent nature of brain activity, interest in estimating rapid functional connectivity (FC) changes that occur during resting-state functional magnetic resonance imaging  ...  patterns of FC ("brain states").  ...  ) , which used a simultaneous multi-slice EPI sequence with a TR of 720 ms.  ... 
doi:10.1016/j.neuroimage.2017.07.005 pmid:28687517 pmcid:PMC5614828 fatcat:wf4l6zsq5je7ncwrwsqwc7ph2u

Impacts of simultaneous multislice acquisition on sensitivity and specificity in fMRI

Benjamin B. Risk, Mary C. Kociuba, Daniel B. Rowe
2018 NeuroImage  
The technique requires an additional processing step in which the slices are separated, or unaliased, to recover the whole brain volume.  ...  Simultaneous multislice (SMS) acquisition can be used to decrease the time between acquisition of fMRI volumes, which can increase sensitivity by facilitating the removal of higherfrequency artifacts and  ...  The time to repetition (TR) is decreased in proportion to the number of simultaneously excited slices, and a twelve-fold reduction has been implemented for 2D echo-planar imaging (EPI) .  ... 
doi:10.1016/j.neuroimage.2018.01.078 pmid:29408461 fatcat:zfhkz2ecqbhafmodpngonhbd2q

Impacts of Simultaneous Multislice Acquisition on Sensitivity and Specificity in fMRI [article]

Benjamin B Risk, Mary C. Kociuba, Daniel Rowe
2018 bioRxiv   pre-print
The technique requires an additional processing step in which the slices are separated, or unaliased, to recover the whole brain volume.  ...  Simultaneous multislice (SMS) acquisition can be used to decrease the time between acquisition of fMRI volumes, which can increase sensitivity by facilitating the removal of higher-frequency artifacts  ...  The time to repetition (TR) is decreased in proportion to the number of simultaneously excited slices, and a twelve-fold reduction has been implemented for 2D echo-planar imaging (EPI) .  ... 
doi:10.1101/243782 fatcat:horzsckbo5hghczfm3mwzndxbm
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