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Abstract #3889

3D Inner Volume bSSFP Functional MRI: Preliminary results

Tianrui Luo1, Douglas Noll1, and Jon-Fredrik Nielsen1
1fMRI Lab, Univ. of Michigan., Ann Arbor, MI, United States

3D inner-volume (IV) imaging enables increased spatiotemporal resolution within a reduced field-of-view (FOV), but is not directly compatible with steady-state sequences such as balanced SSFP. We present an IV bSSFP sequence for transition-band functional MRI, a technique that can produce high functional signal within a relatively narrow off-resonance frequency (B0) range. We use spatially tailored 3D radiofrequency (RF) pulses for IV excitation and outer-volume (OV) saturation, and a pair of gradient spoilers that make the overall sequence balanced (unbalanced) for IV (OV) spins. This approach produces good OV suppression in most regions, and high functional signal near a transition band.

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