Abstract #3722
Real-time concomitant gradient field correction.
Kevin Perkins 1,2 , Reeve Ingle 2 , Juan Santos 2 , Galen Reed 2 , Ken Johnson 2 , and William Overall 2
1
BYU, Provo, Utah, United States,
2
HeartVista,
Menlo Park, Ca, United States
One source of artifacts in spiral scans is concomitant
gradient fields (CGFs), which are higher order field
terms that accompany linear gradients. Demodulation is a
zero-order CGF correction method that has been
implemented in real-time. However, this simple approach
does not effectively correct CGF effects in non-axial
slices. Multi-frequency binning is a more advanced
technique that requires more computational time. We
propose an intermediate, first-order solution that
retains the non-axial correction capabilities of the
multifrequency approach along with the speed of simple
demodulation correction. This first-order approach is
shown to eliminate blurring artifact inside a
user-defined FOV.
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