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  The vessel size specificity and sensitivity of rapid CPMG sequences in functional BOLD imaging

Scheffler, K., Engelmann, J., & Heule, R. (2021). The vessel size specificity and sensitivity of rapid CPMG sequences in functional BOLD imaging. Poster presented at 2021 ISMRM & SMRT Annual Meeting & Exhibition (ISMRM 2021).

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Scheffler, K1, 2, Author              
Engelmann, J1, 2, Author              
Heule, R1, 2, Author              
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1Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497796              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              

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 Abstract: For reduced refocusing flip angles, the peak of the vessel size sensitivity curve is shifting towards larger radii with increasing echo time. The BOLD sensitivity is largely independent of the refocusing flip angle down to about 40°. CPMG or GRASE can be used with low refocusing flip angles without significant loss of sensitivity to BOLD and without the need for centric reordering. Signals acquired before or after the spin echo time point show contributions from larger vessels similar to gradient echo sequences. This effect is reduced for longer echo times.

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 Dates: 2021-05
 Publication Status: Published online
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Title: 2021 ISMRM & SMRT Annual Meeting & Exhibition (ISMRM 2021)
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Start-/End Date: 2021-05-15 - 2021-05-20

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Title: 2021 ISMRM & SMRT Annual Meeting & Exhibition (ISMRM 2021)
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: 2676 Start / End Page: - Identifier: -