Effect of Different Diffusion Maps on RegistrationResults

In this paper, we compare registration results obtainedusing different diffusion maps extracted from diffusion tensorimaging (DTI). Fractional Anisotropy (FA) and Ellipsoidal AreaRatio (EAR) are two diffusion maps (indices) that may be usedfor image registration. First, we use FA maps to find deformationmatrix and register diffusion weighted images. Then, we use EARmaps and finally we use both of FA and EAR maps to registerdiffusion weighted images. The difference between FA valuesbefore deformation and after registration using the FA alone orEAR alone has a median of 0.57 and using both of them has amedian of 0.29. Therefore, the results of registration using bothof the FA and EAR indices are superior to those obtained usingonly one of them alone.

Keywords:

Tensor Imaging (DTI) , Registration , Fractional Anisotropy (FA) , Mean Diffusivity (MD) , EllipsoidalArea Ratio (EAR)