Corrections for nonuniform sampling distortions in magnetic resonance imagery.
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.
Trussell
H J
HJ
Dept. of Electr. and Comput. Eng., North Carolina State Univ., Raleigh, NC.
Arnder
L L
LL
Moran
P R
PR
Williams
R C
RC