System and method for generating water-fat separated image
AssigneeGE Precision Healthcare LLC
InventorsXinzeng Wang, Kang Wang
Life of this patent
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Abstract
A method for generating an image of a subject with a magnetic resonance imaging (MRI) system includes receiving MR image data acquired with the MRI system, wherein the MR image data comprises first gradient echo data and second gradient echo data and determining a linear phase error estimate. The linear phase error estimate may be based on all of the MR image data or a subvolume thereof, and may include calculating a pixel phase error for each of a plurality of pixels within the MR image data and determining a mean of the pixel phase error. Corrected MR image data is generated based on the linear phase error estimate, and then a water image and/or a fat image based on the corrected MR image data.
Claims20
A method for generating an image of a subject with a magnetic resonance imaging (MRI) system, the method comprising:
- receiving MR image data acquired with the MRI system, wherein the MR image data comprises first gradient echo data and second gradient echo data;
- determining a linear phase error estimate, wherein determining the linear phase error estimate includes:
- calculating a pixel phase error for each of a plurality of pixels within the MR image data;
- determining a mean of the pixel phase error, wherein the linear phase error estimate is based on the mean of the pixel phase error;
- adjusting the second gradient echo data based on the linear phase error estimate to generate corrected MR image data;
- and
- generating a water image and/or a fat image based on the corrected MR image data.
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 gradient pulses to the polarizing magnetic field;
- a radio frequency (RF) system configured to apply an RF field to the subject and to acquire magnetic resonance (MR) image data therefrom;
- a processing device;
- and
- a memory storage device comprising instructions executable by the processing device to:
- control the MRI system to acquire MR image data from the subject using generated by the gradient pulses, wherein the MR image data comprises first gradient echo data and second gradient echo data;
- calculate a pixel phase error for each of a plurality of pixels within the MR image data;
- determine a linear phase error estimate based on the pixel phase errors for the plurality of pixels, wherein determining the linear phase error estimate includes determining a mean of the pixel phase error;
- adjust the second gradient echo data based on the linear phase error estimate to generate corrected MR image data;
- and
- generate a water image and/or a fat image based on the corrected MR image data.
Dependencies are inferred from the claim text.