Correction of periodic motion artifacts along the slice selection axis in MRI

Author

Mitsa, T. ; Parker, K.J. ; Smith, W.E. ; Tekalp, A.M. ; Szumowski, J.

Author_Institution

Rochester Univ., NY, USA

Volume

9

Issue

3

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

310

Lastpage

317

Abstract

The effect of periodic motion of a single magnetic resonance imaging (MRI) slice in the direction of the slice selection axis is modeled as amplitude modulation of the raw data with a motion kernel along the phase encoding direction in the Fourier domain. It is shown that this motion can be detected in 1-D projections of the raw data along the frequency encoding direction which in combination with appropriate filtering leads to the recovery of the motion kernel. It is demonstrated by means of simulation examples that significant reduction in the amplitude of ghost artifacts is obtained when the image is filtered by the inverse of the motion kernel. Some issues to be investigated before the technique can be used in a clinical environment are mentioned

Keywords

biomedical NMR; patient diagnosis; Fourier domain; NMR imaging; artifact correction; clinical environment; ghost artifacts; image filtering; magnetic resonance imaging; medical diagnostic imaging; motion kernel; periodic motion artifacts; phase encoding direction; raw data amplitude modulation; slice selection axis; Amplitude modulation; Data acquisition; Encoding; Filtering; Frequency; Kernel; Magnetic resonance imaging; Motion detection; Optical filters; Optical imaging; Optical sensors; Radiology;

fLanguage

English

Journal_Title

Medical Imaging, IEEE Transactions on

Publisher

ieee

ISSN

0278-0062

Type

jour

DOI

10.1109/42.57769

Filename

57769