Coarse-Grained Spatiotemporal Acquisition Design for Diffusion MRI

Acquisition protocols that allow to capture time-dependent changes in diffusion signal require long imaging time. We address this issue through an optimized subsampling scheme that maximizes accuracy of the spatiotemporal diffusion signal representation, qτ-dMRI, for given time constraints. Our proposed coarse-grained variant of the problem reduces the space of feasible acquisition parameters compared to the finegrained approach causing no significant deterioration of a reconstruction accuracy in most of the studied cases.