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Abstract #1721

Gross structure of magnetic field inhomogeneity in the human cervical spinal cord

Paul Summers 1 , Armando Bauleo 2 , Stefania Favilla 2 , Fabiola Cretti 2,3 , Fausta Lui 2 , and Carlo A Porro 2

1 UniMoRE / IEO / Policlinico Milan, Modena, MO, Italy, 2 University of Modena and Reggio Emilia, Modena, Italy, 3 Ospedali Riuniti di Bergamo, Bergamo, Italy

We have measured the magnetic field (B0) in the human cervical spinal cord. We observed a large-scale B0 variation of 150-300Hz difference between the brain and mid-cervical spine, with a partial recovery in the lower spinal cord. Superposed on this large-scale feature were smaller oscillations in B0 having spatial intervals consistent with the lengths of the corresponding vertebral bodies. In contrast to prior studies, we found minimal difference in the temporal variation in B0 along the length of the cervical spine. The observed inhomogeneity profile provides a context for understanding the difficulties of shimming in the cervical spine.

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