Abstract #1488
Multi-contrast inversion-recovery EPI (MI-EPI) functional MRI at 7 T
Ville Renvall 1,2 , Thomas Witzel 1,2 , Marta Bianciardi 1,2 , and Jonathan R. Polimeni 1,2
1
Athinoula A. Martinos Center for Biomedical
Imaging, Massachusetts General Hospital, Charlestown,
MA, United States,
2
Department
of Radiology, Harvard Medical School, Boston, MA, United
States
Multi-contrast inversion-recovery EPI (MI-EPI) was
implemented on a 7T system and was used to study brain
activations simultaneously using T
1
-, BOLD-,
and multiple inversion-recovery-time-signal changes
following visual stimulation at a 3-s sampling period.
The different contrast images yielded similar activation
maps, with extent of activation roughly proportional to
the signal levels, but less activation with CSF
suppressed rather than gray matter suppressed contrasts.
T
1
values
were found to significantly increase during visual
stimulation concordant with blood volume increases
and/or inflow effects.
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