Abstract #2514
Phase unwrapping near metal implants with prior knowledge of the implant geometry
Laura J. King 1 , Philip J. Bones 1 , and Rick P. Millane 1
1
Department of Electrical and Computer
Engineering, University of Canterbury, Christchurch, New
Zealand
The three-point Dixon technique can be used to
successfully suppress fat near metal implants if the
phase shift due to the B0 field inhomogeneities can be
estimated accurately. This research describes a new
technique where the phase unwrapping is guided by prior
knowledge of the implant. Using an approximate model of
the implant location and orientation, the phase
unwrapping is simplified to estimating the difference
between the model and true phase shift. The model is
rotated and translated to minimise the phase unwrapping
required. Initial results obtained from simulation are
shown.
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