Multispectral imaging sequences mitigate geometric distortion near metallic implants at the expense of readout blur and residual intensity artifacts. To address these limitations, a method for jointly estimating the image content and field inhomogeneity near metal is presented. A dual polarity readout acquisition is used to provide sufficient conditioning for the estimation problem. The method is studied in simulation as well as in a physical phantom consisting of a shoulder implant embedded in a resolution grid. Results indicate that the method can greatly reduce readout blur and in some cases eliminate residual intensity artifacts.
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