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Abstract #3268

Path based phase estimation for fat suppression near metal implants

Laura Jane King1, Rick Millane1, Hans Weber2, Brian Hargreaves2, and Phil Bones1

1Electrical and Computer Engineering, University of Canterbury, Christchurch, New Zealand, 2Radiology, Stanford University, Stanford, CA, United States

Being able to perform robust Dixon imaging near metal implants would allow for improved contrast-enhanced fat suppression. This requires accurate calculation of the phase shift due to the B0 field variation. We present a new technique where the phase is first estimated at the outer edges of the image. The method works inwards along a set of adjacent paths, finishing at the boundary of the implant. The described method is used to successfully separate fat and water in the vicinity of a titanium hip replacement, with phantom results shown.

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