An improved algorithm for 2-D translational motion artifact correction

Author

Medley, Michael ; Yan, Hong ; Rosenfeld, Dov

Author_Institution

Sch. of Electr. Eng., Sydney Univ., NSW, Australia

Volume

10

Issue

4

fYear

1991

fDate

12/1/1991 12:00:00 AM

Firstpage

548

Lastpage

553

Abstract

The quality of magnetic resonance imaging systems has improved to the point that motion is a major limitation in many examinations. Translational motion in the imaging plane causes the phase of the data to be corrupted. An algorithm using computer post-processing is proposed to correct the phase of the data, and hence remove the artifact. This algorithm has superior convergence properties to an earlier algorithm, which is achieved by incorporating additional prior information specific to the situation. The algorithm is verified using a Shepp and Logan phantom with simulated motion in the imaging plane. It is shown that the algorithm can correct both periodic and random motion, and that the algorithm is not significantly degraded when noise is present

Keywords

biomedical NMR; computerised picture processing; medical diagnostic computing; 2D translational motion artifact correction; Shepp-Logan phantom; algorithm; computer post-processing; convergence properties; data phase corruption; magnetic resonance imaging systems; periodic motion; random motion; Australia; Convergence; Degradation; Fourier transforms; Frequency; Helium; Imaging phantoms; Magnetic noise; Magnetic resonance imaging; Navigation;

fLanguage

English

Journal_Title

Medical Imaging, IEEE Transactions on

Publisher

ieee

ISSN

0278-0062

Type

jour

DOI

10.1109/42.108589

Filename

108589