title: [A new algorithm for affine motion compensation in PROPELLER MRI based on image domain].
abstract: Affine motion is common during PROPELLER magnetic resonance imaging (MRI) in abdomen or other soft tissues. The current algorithm, up till now, for affine motion compensation is based on frequency domain, which compensates the motion in k space and then reconstruct the final image based on gridding method. But aliasing and some tiny artifacts may exist. This paper proposed a new algorithm for affine motion compensation based on image domain. Firstly, exact affine motion information was obtained through the image registration, secondly k space coordinate was corrected for compensating the k space strips sampling density, then the images obtained from inverse FFT was compensated using motion information, finally the final results were composited after rotation. The experimental results showed that the proposed method could more effectively suppress the motion artifacts compared to the current algorithm.
authors.affiliation: Institute for Medical Information & Technology, School of Biomedical Engineering, Southern Medical University, Guangzhou 510515, China.
authors.forename: Yanli
authors.initials: Y
authors.lastname: Song
authors.forename: Yanqiu
authors.initials: Y
authors.lastname: Feng
authors.forename: Xiaowu
authors.initials: X
authors.lastname: Liu
authors.forename: Aizhen
authors.initials: A
authors.lastname: Zhou
authors.forename: Cong
authors.initials: C
authors.lastname: Wang
authors.forename: Wufan
authors.initials: W
authors.lastname: Chen
mesh_terms: D000005:Abdomen / Q000473:pathology; D000465:Algorithms; D016477:Artifacts; D005583:Fourier Analysis; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D009068:Movement