Single-shot dual-z-shimmed sensitivity-encoded spiral-in/out imaging for functional MRI with reduced susceptibility artifacts

2007 ◽  
Vol 59 (1) ◽  
pp. 221-227 ◽  
Author(s):  
Trong-Kha Truong ◽  
Allen W. Song
Keyword(s):  
Functional Mri ◽  
Single Shot ◽  
Susceptibility Artifacts

scholarly journals Event-related functional MRI of awake behaving pigeons at 7T

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Mehdi Behroozi ◽  
Xavier Helluy ◽  
Felix Ströckens ◽  
Meng Gao ◽  
Roland Pusch ◽  
...  
Keyword(s):  
Functional Mri ◽  
Color Discrimination ◽  
Motion Artifacts ◽  
Stress Conditions ◽  
Neural Mechanisms ◽  
Single Shot ◽  
Visually Guided ◽  
Hemodynamic Response Function ◽  
Species Specific ◽  
And Behavior

Abstract Animal-fMRI is a powerful method to understand neural mechanisms of cognition, but it remains a major challenge to scan actively participating small animals under low-stress conditions. Here, we present an event-related functional MRI platform in awake pigeons using single-shot RARE fMRI to investigate the neural fundaments for visually-guided decision making. We established a head-fixated Go/NoGo paradigm, which the animals quickly learned under low-stress conditions. The animals were motivated by water reward and behavior was assessed by logging mandibulations during the fMRI experiment with close to zero motion artifacts over hundreds of repeats. To achieve optimal results, we characterized the species-specific hemodynamic response function. As a proof-of-principle, we run a color discrimination task and discovered differential neural networks for Go-, NoGo-, and response execution-phases. Our findings open the door to visualize the neural fundaments of perceptual and cognitive functions in birds—a vertebrate class of which some clades are cognitively on par with primates.

scholarly journals Correction of respiratory artifacts in MRI head motion estimates

2018 ◽  
Author(s):  
Damien A. Fair ◽  
Oscar Miranda-Dominguez ◽  
Abraham Z. Snyder ◽  
Anders Perrone ◽  
Eric A. Earl ◽  
...  
Keyword(s):  
Real Time ◽  
Functional Mri ◽  
Brain Mri ◽  
Body Motion ◽  
Head Motion ◽  
Single Shot ◽  
Resting State Functional Connectivity ◽  
Novel Approach ◽  
Field Fluctuations ◽  
Functional Connectivity Mri

AbstractHead motion represents one of the greatest technical obstacles for brain MRI. Accurate detection of artifacts induced by head motion requires precise estimation of movement. However, this estimation may be corrupted by factitious effects owing to main field fluctuations generated by body motion. In the current report, we examine head motion estimation in multiband resting state functional connectivity MRI (rs-fcMRI) data from the Adolescent Brain and Cognitive Development (ABCD) Study and a comparison ‘single-shot’ dataset from Oregon Health & Science University. We show unequivocally that respirations contaminate movement estimates in functional MRI and that respiration generates apparent head motion not associated with degraded quality of functional MRI. We have developed a novel approach using a band-stop filter that accurately removes these respiratory effects. Subsequently, we demonstrate that utilizing this filter improves post-processing data quality. Lastly, we demonstrate the real-time implementation of motion estimate filtering in our FIRMM (Framewise Integrated Real-Time MRI Monitoring) software package.

scholarly journals Correction of metal-induced susceptibility artifacts for functional MRI during deep brain stimulation

NeuroImage ◽  
2017 ◽  
Vol 158 ◽  
pp. 26-36 ◽  
Author(s):  
Myung-Ho In ◽  
Shinho Cho ◽  
Yunhong Shu ◽  
Hoon-Ki Min ◽  
Matt A. Bernstein ◽  
...  
Keyword(s):  
Deep Brain Stimulation ◽  
Functional Mri ◽  
Brain Stimulation ◽  
Induced Susceptibility ◽  
Susceptibility Artifacts ◽  
Deep Brain

Functional MRI using multiple receiver coils: BOLD signal changes and signal-to-noise ratio for three-dimensional-PRESTO vs. single shot EPI in comparison to a standard quadrature head coil

2004 ◽  
Vol 20 (2) ◽  
pp. 321-326 ◽  
Author(s):  
Volker Hesselmann ◽  
Ralf Girnus ◽  
Christoph Wedekind ◽  
Stefan Hunsche ◽  
Juergen Bunke ◽  
...  
Keyword(s):  
Functional Mri ◽  
Signal To Noise Ratio ◽  
Three Dimensional ◽  
Single Shot ◽  
Bold Signal ◽  
Signal To Noise ◽  
Signal Changes ◽  
Noise Ratio ◽  
Multiple Receiver ◽  
Head Coil

Gradient compensated reverse spiral acquisition for reducing susceptibility artifacts in functional MRI

NeuroImage ◽  
2001 ◽  
Vol 13 (6) ◽  
pp. 43 ◽  
Author(s):  
V.Andrew Stenger ◽  
Qing Yang ◽  
Fernando Boada ◽  
Douglas Noll
Keyword(s):  
Functional Mri ◽  
Susceptibility Artifacts ◽  
Spiral Acquisition

Assessment of functional MRI at 1.0 Tesla: Clinical application for motor/language studies using a single-shot spin-echo technique

NeuroImage ◽  
1996 ◽  
Vol 3 (3) ◽  
pp. S407
Author(s):  
P. Reimer ◽  
G. Schuierer ◽  
T. Hellmann ◽  
S. Knecht ◽  
K. Papke ◽  
...  
Keyword(s):  
Functional Mri ◽  
Clinical Application ◽  
Spin Echo ◽  
Single Shot ◽  
Language Studies ◽  
Spin Echo Technique

Functional MRI of the human motor cortex using single-shot, multiple gradient-echo spiral imaging

1999 ◽  
Vol 17 (9) ◽  
pp. 1239-1243 ◽  
Author(s):  
Markus Barth ◽  
Alexander Metzler ◽  
Markus Klarhöfer ◽  
Stefan Röll ◽  
Ewald Moser ◽  
...  
Keyword(s):  
Motor Cortex ◽  
Functional Mri ◽  
Single Shot ◽  
Gradient Echo ◽  
Spiral Imaging ◽  
Human Motor Cortex ◽  
Human Motor
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