Title :
Corrections for nonuniform sampling distortions in magnetic resonance imagery
Author :
Trussell, H.J. ; Arnder, L.L. ; Moran, P.R. ; Williams, R.C.
Author_Institution :
Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA
fDate :
3/1/1988 12:00:00 AM
Abstract :
A technique for estimating and correcting nonuniform sampling distortions in magnetic resonance imagery is presented. The technique consists of first estimating the sampling grid distortion using a parametric model, and then estimating the uniformly sampled data by interpolation on the nonuniform grid. Parameterized models for two particular sampling grid distortion are presented. Maximum likelihood and maximum a posteriori estimators are developed for these distortions. Using computer simulated data, these estimators are shown to perform well
Keywords :
biomedical NMR; patient diagnosis; computer simulated data; magnetic resonance imagery; maximum a posteriori estimators; maximum likelihood estimators; nonuniform grid interpolation; nonuniform sampling distortions corrections; parameterised models; Biological system modeling; Computational modeling; Fourier transforms; Image sampling; Interpolation; Magnetic resonance; Magnetic resonance imaging; Nonlinear distortion; Nonuniform sampling; Parametric statistics;
Journal_Title :
Medical Imaging, IEEE Transactions on
