Abstract #2984
Evaluation of spiral imaging variants for high-resolution fMRI in human superior colliculus
Vimal Singh 1 and David Ress 2
1
Electrical Engineering, University of Texas
at Austin, Austin, TX, United States,
2
Neuroscience,
Baylor College of Medicine, Houston, TX, United States
Functional MRI in human superior colliculus (SC)
requires high resolution. Dual-echo spiral has been used
for high-resolution applications in cortex. Here we tune
and evaluate various dual-echo spiral variants for
sub-cortical application: single-echo spiral in, and
dual-echo spiral in-in, in-out, and out-out. The
functional signal-to-noise ratio of the activity evoked
by visual stimulation was used as a performance metric.
This metric was first used to find the optimal echo time
for each variant. Then, using the optimal TE, each
variant was compared to single-echo spiral out as a
reference. Best performance was obtained for dual-echo
spiral out.
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