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Echo Planar Imaging (EPI)
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Implemented by Peter Mansfield (1977)
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Single-shot (can be run multi-shot)
Scan time = TR
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Blipped, spiral and constant versions
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Inherently noisy
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Limited resolution (e.g. 64 or 128 matrix)
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Can be SE or GRE based
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Widespread use in fMRI & DWI