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Abstract #3406

Mitigation of Blurring due to View-Angle Tilting in Multispectral Imaging

Alexander R Toews1,2, Philip K Lee1,2, Daehyun Yoon1, and Brian A Hargreaves1,2,3
1Radiology, Stanford University, Stanford, CA, United States, 2Electrical Engineering, Stanford University, Stanford, CA, United States, 3Bioengineering, Stanford University, Stanford, CA, United States

Imaging near metal is challenging due to severe metal-induced field inhomogeneities. Multispectral imaging sequences employ view-angle tilting (VAT) to correct in-plane distortions due to nearby metal at the expense of blurring the entire image. We exploit the additional phase-encoding dimension acquired in multispectral imaging in order to reduce the VAT-induced blur. The method primarily consists of regridding k-space measurements to avoid the VAT-induced shear. Results on a grid phantom demonstrate the ability of this method to reduce readout blur. This work highlights an important limitation of VAT and demonstrates strategies for mitigating this effect.

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