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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