Sung-Hong Park1,2, Tae Kim1,
1Radiology, University of Pittsburgh,
Pittsburgh, PA, United States; 2Research Imaging Institute,
Ophthalmology/Radiology, University of Texas Health Science Center at San
Antonio, San Antonio, TX, United States
We
acquired high resolution multiple phase-cycled bSSFP fMRI datasets in rat
brains at 9.4T and separated FID and main echo components based on Fourier
analysis. The FID component showed stronger fMRI signals than the main echo
component, but it showed stronger correlation with both intracortical veins
and cortical surface veins. The fMRI signal from the main echo component
could contribute up to half of that from the FID component, implying that the
main echo component should not be neglected in interpreting pass-band bSSFP
fMRI signals.
Keywords