Abstract #4224

Computational Shim Coil Design Applied to Augmenting a Shim Array with a Non-Eye-Occluding Face Plate

Nicolas Arango¹, Jason Stockmann^2,3, Elfar Adalsteinsson^1,4, and Jacob White¹

¹Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, United States, ²A. A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA, United States, ³Harvard Medical School, Boston, MA, United States, ⁴Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA, United States

Local multi coil shim arrays enable improved brain ΔB₀ homogeneity shimming at low overall cost. We have developed tools for the computational design of additional local shim coils to augment existing shim arrays using sparse factorization techniques. A proof of concept seven channel face shim coil was designed and tested in vivo. This proof-of-concept shim coil shows promise for improving static field inhomogeneity in the pre-frontal cortex.

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