A comprehensive approach for correcting motion and distortion in diffusion weighted MRI
نویسندگان
چکیده
G. K. Rohde, A. S. Barnett, P. J. Basser, S. Marenco, C. Pierpaoli National Institutes of Health, Bethesda, Maryland, United States SYNOPSIS: We present a method for removing artifacts related to patient motion and eddy-current induced image distortions in DW-MRI. The images are corrected for motion and distortion simultaneously using a well-established registration technique. Subject motion is modeled using a 3D rigid body transformation while image distortion is modeled using a general solution for eddy-current induced fields inside the magnet. The DW-MRI dataset can at the same time be rigidly aligned to a standard template. Thus our robust postprocessing method can be used to simultaneously remove motion and distortion related artifacts as well as to position the dataset in a standardized orientation.
منابع مشابه
Comprehensive approach for correction of motion and distortion in diffusion-weighted MRI.
Patient motion and image distortion induced by eddy currents cause artifacts in maps of diffusion parameters computed from diffusion-weighted (DW) images. A novel and comprehensive approach to correct for spatial misalignment of DW imaging (DWI) volumes acquired with different strengths and orientations of the diffusion sensitizing gradients is presented. This approach uses a mutual information...
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