Perfusion fraction tensor imaging of the kidney

The commonly used model of Intravoxel incoherent motion (IVIM) implies an isotropic perfusion fraction f. Diffusion tensor imaging (DTI) describes anisotropy in the diffusion. A simple combination of IVIM and DTI still cannot distinguish isotropic from anisotropic perfusion fraction. We propose a perfusion fraction tensor model in combination with IVIM-DTI. The presented model is compared to an isotropic perfusion model in the kidney using Akaikes information criterion. Six healthy volunteers have been examined. In large part cortex and medulla are described equally or better by the perfusion fraction tensor model than by the isotropic perfusion fraction model.

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