Autocorrection of 3D MR images for motion artifacts
AssigneeMayo Foundation for Medical Education and Research
InventorsJoel P. Felmlee, Kiaran P. McGee, Richard L. Ehman, Armando Manduca
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Abstract
A three-dimensional image data set is acquired with an MRI system and autocorrected to reduce artifacts caused by subject motion during image acquisition. Correction for motion along one or two axes is performed by selecting a 2D slice of data and autocorrecting it to produce phase corrections that are then made to the entire 3D image data set. This may be repeated by autocorrecting an additional 2D slice perpendicular to the first 2D slice to produce phase corrections for the 3D image data set for motion along the third axis.
Claims9
A method for autocorrecting a three-dimensional magnetic resonance data set for motion that occurs during its acquisition, the steps comprising:
- Fourier transforming the three-dimensional magnetic resonance data set along a first axis to produce a first hybrid 3D data set;
- extracting a two-dimensional array of data from the first hybrid 3D data set which lies in a plane perpendicular to the first axis;
- producing phase corrections by performing an autocorrection process on the extracted two-dimensional array of data;
- phase correcting the three-dimensional magnetic resonance data set by correcting the phase of samples in each 2D plane therein which is perpendicular to the first axis with the corresponding phase corrections;
- and
- reconstructing an image by performing a Fourier transformation on the corrected three-dimensional magnetic resonance data set.
Dependencies are inferred from the claim text.