Title :
Motion artifact correction in MRI using generalized projections
Author :
Hedley, Mark ; Yan, Hong ; Rosenfeld, Dov
Author_Institution :
Sch. of Electr. Eng., Sydney Univ., NSW, Australia
fDate :
3/1/1991 12:00:00 AM
Abstract :
An algorithm that suppresses translational motion artifacts in magnetic resonance imaging (MRI) by using post processing on a standard spin-warp image is presented. It is shown that translational motion causes an additional phase factor in the detected signal and that this phase error can be removed using an iterative algorithm of generalized projections. The method has been tested using computer simulations and it successfully removed most of the artifact. The algorithm converges even in the presence of severe noise
Keywords :
biomedical NMR; patient diagnosis; algorithm; artifact correction; computer simulations; generalized projections; iterative algorithm; magnetic resonance imaging; phase factor; post processing; standard spin-warp image; translational motion artifacts; Biomedical monitoring; Computer errors; Data acquisition; Iterative algorithms; Magnetic resonance imaging; Motion detection; Phase detection; Radio frequency; Signal detection; Testing;
Journal_Title :
Medical Imaging, IEEE Transactions on
