With the advent of multi-shell acquisition, there is an increasing need for compact linear orthonormal representations of the DWI signal that extend over the radial as well as angular domain. In this work, we evaluate and compare 3 candidate basis function sets: spherical Bessel functions with and without reparametrization and the SHORE basis. Results show that the reparametrized Bessel functions and SHORE basis can faithfully represent the DWI signal with low numbers of parameters, and can be tuned to the properties of the signal independently of acquisition parameters.
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