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

Volume

7

Issue

1

fYear

1988

fDate

3/1/1988 12:00:00 AM

Firstpage

32

Lastpage

44

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;

fLanguage

English

Journal_Title

Medical Imaging, IEEE Transactions on

Publisher

ieee

ISSN

0278-0062

Type

jour

DOI

10.1109/42.3927

Filename

3927