System and method for controlling concomitant gradient phase errors in chemical-shift encoded imaging
AssigneeWisconsin Alumni Research Foundation
InventorNathan Tibbitts Roberts
Life of this patent
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Abstract
A system and method are provided for magnetic resonance imaging (MRI) and/or image reconstruction that includes acquiring multi-pass, chemical shift-encoded (CSE)-MRI imaging data of a subject. The method further includes performing a complex, joint estimation of phase terms in the imaging data for each pass of the multi-pass, CSE-MRI imaging data to account for concomitant gradient (CG)-induced phase errors of different passes. The method also includes generating at least one of a proton density fat fraction (PDFF) estimate or an R2* estimate that is unbiased by CG-induced phase errors using the phase terms and communicating a report that includes at least one of the PDFF estimate or the R2* estimate.
Claims16
A magnetic resonance imaging (MRI) system comprising:
- a magnet system configured to generate a polarizing magnetic field about at least a portion of a subject arranged in the MRI system;
- a plurality of gradient coils configured to apply magnetic gradients to the polarizing magnetic field;
- a radio frequency (RF) system configured to apply an excitation field to the subject and acquire MR image data from the subject;
- a computer system programmed to:
- control the plurality of gradient coils and the RF system to perform a multi-pass, chemical shift-encoded (CSE)-MRI acquisition of imaging data from the subject;
- perform a complex, joint estimation of phase terms in the imaging data for each pass of the multi-pass, CSE-MRI acquisition to account for concomitant gradient (CG)-induced phase errors of different passes;
- generate at least one of a proton density fat fraction (PDFF) estimate or an R2* estimate that is unbiased by CG-induced phase errors using the phase terms;
- and
- communicate a report that includes at least one of the PDFF estimate or the R2* estimate.
A method comprising:
- acquiring multi-pass, chemical shift-encoded (CSE)-MRI imaging data of a subject;
- performing a complex, joint estimation of phase terms in the imaging data for each pass of the multi-pass, CSE-MRI imaging data to account for concomitant gradient (CG)-induced phase errors of different passes;
- generating at least one of a proton density fat fraction (PDFF) estimate or an R2* estimate that is unbiased by CG-induced phase errors using the phase terms;
- and
- communicating a report that includes at least one of the PDFF estimate or the R2* estimate.
Dependencies are inferred from the claim text.