Keywords: System Imperfections, System Imperfections: Measurement & Correction
Motivation: Successful multi-coil B0 field control relies on reproducible hardware placement.
Goal(s): Our goal was to detect hardware misplacements from MC-generated field patterns alone (i.e. without field probes) to allow spatial transformations for correction.
Approach: We co-registered unique field maps before and after hardware displacements to derive the underlying translation and rotation parameters.
Results: In simulation and preliminary scanner validation, hardware misplacements were detected with sub-millimeter/sub-degree precision.
Impact: Field-based spatial self-registration for multi-coil field inserts is expected to allow optimal B0 field control even with differences in hardware placement, thus preserving the best shim performance.
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