FIG. 6.

Angular deviations of the major eigenvectors between reconstructed images and the reference image. If there was no simulated motion all methods performed similar (first and fourth rows). In the case of simulated motion direct reconstruction with no motion correction led to significant deviation (e,f,i,j,q,r,u,v). After the application of motion correction and reconstruction with CG-SENSE (method C) the orientation error decreased; however, some residual error remained because the change in diffusion-encoding direction was not taken into account (g,k,s,w). Motion and diffusion-encoding direction correction using NLCG significantly reduced orientation errors to ≈0.3° for all level of motion severity (fourth column).