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Magnetic Resonance Imaging
Article . 2007 . Peer-reviewed
License: Elsevier TDM
Data sources: Crossref
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Computer-generated fMRI phantoms with motion–distortion interaction

Authors: Ning, Xu; J Michael, Fitzpatrick; Yong, Li; Benoit M, Dawant; David R, Pickens; Victoria L, Morgan;

Computer-generated fMRI phantoms with motion–distortion interaction

Abstract

As an extension of previous work on computer-generated phantoms, more accurate, realistic phantoms are generated by integrating image distortion and signal loss caused by susceptibility variations. With the addition of real motions and activations determined from actual functional MRI studies, these phantoms can be used by the fMRI community to assess with higher fidelity pre-processing algorithms such as motion correction, distortion correction and signal-loss compensation. These phantoms were validated by comparison to real echo-planar images. Specifically, studies have shown the effects of motion-distortion interactions on fMRI. We performed motion correction and activation analysis on these phantoms based on a block paradigm design using SPM2, and the results demonstrate that interactions between motion and distortion affect both motion correction and activation detection and thus represent a critical component of phantom generation.

Related Organizations
Keywords

Brain Mapping, Phantoms, Imaging, Movement, Image Interpretation, Computer-Assisted, Models, Neurological, Brain, Humans, Computer Simulation, Artifacts, Magnetic Resonance Imaging

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    influence
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
6
Top 10%
Top 10%
Average
bronze