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Abstract #3083

A 24-channel shim array for real-time shimming of the human spinal cord: Characterization and proof-of-concept experiment

Ryan Topfer 1 , Kai-Ming Lo 2 , Karl Metzemaekers 2 , Donald Jette 2 , Hoby P. Hetherington 3 , Piotr Starewicz 2 , and Julien Cohen-Adad 1,4

1 Institute of Biomedical Engineering, Ecole Polytechnique de Montral, Montreal, QC, Canada, 2 Resonance Research Inc., Billerica, MA, United States, 3 Department of Radiology, University of Pittsburgh, Pittsburgh, PA, United States, 4 Functional Neuroimaging Unit, CRIUGM, Universit de Montral, Montreal, QC, Canada

A novel shim system is introduced for the purpose of real-time shimming in spinal imaging to compensate for respiratory-related distortions of the main field. The 24 independent, rectangular planar shim coils are embedded within the patient bed table, in close proximity to the spine of the scanned subject. Preliminary calibration and proof of concept phantom experiments are described. Compared to the unshimmed case, the standard deviation of the field inhomogeneity, as calculated over 1.1 L volumes of interest, was reduced by over 30 %.

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