T2 weighted high-resolution fMRI in human visual cortex at 9.4 T using 3D-GRASE
Valentin G. Kemper 1 , Federico De Martino 1,2 , Desmond H. Y. Tse 3,4 , Benedikt A. Poser 1 , Essa Yacoub 2 , and Rainer Goebel 1
Cognitive Neuroscience FPN, Maastricht
University, Maastricht, Limburg, Netherlands,
for Magnetic Resonance Research, CMRR, Radiology,
University of Minnesota, Minneapolis, MN, United States,
and Psychopharmacology, FPN, Maastricht University,
Maastricht, Limburg, Netherlands,
University Medical Centre, Maastricht University,
A zoomed, inner-volume 3D-GRASE sequence was used to
acquire T2 weighted 0.8 mm and 0.6 mm isotropic
resolution fMRI at 9.4 T in human early visual areas.
Robust activation patterns could be observed at both
resolutions. Results are compared to 7 T data of the
same volunteer with the same functional paradigm and
similar technical set-up. At the same resolution,
temporal SNR is significantly higher at 9.4 T than at 7
T, while T2 weighted fMRI signal changes induced by a
visual task were found to be similar.
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