K-space and image space combination for motion artifact correction in multicoil multishot diffusion weighted imaging.
Motion during diffusion encodings leads to phase errors in different shots of a multishot acquisition. Phase differences in k-space data among shots result in phase cancellation artifacts in the reconstructed image. Due to aliasing of the phase from under-sampled regions of the shot, correction of the phase error using direct low-resolution phase subtraction is incomplete. We introduce a new k-space and image-space combination (KICT) method for motion artifacts cancellation that avoids incomplete phase error correction. Further, the method preserves the phase of the object, which is important for parallel imaging applications.
Van
Anh T
AT
Electrical and Computer Engineering Department, University of Illinois at Urbana-Champaign, USA. tvan2@uiuc.edu
Karampinos
Dimitrios C
DC
Georgiadis
John G
JG
Sutton
Bradley P
BP
D001698:Biomedical Engineering; D001921:Brain / Q000033:anatomy & histology; D038524:Diffusion Magnetic Resonance Imaging / Q000706:statistics & numerical data*; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000706:statistics & numerical data*; D015233:Models, Statistical; D009038:Motion; D012680:Sensitivity and Specificity