Fig. 1.

Illustration of the stochastic MRI undersampling reconstruction model to calculate the epistemic uncertainty. Here, N instances of the model parameters θ are drawn from $\mathcal{N}\mathit{\left(}\mathit{\mu },\mathit{L}{\mathit{L}}^{\mathit{\top }}\mathit{\right)}$, which lead to N output images ${\mathit{X}}_{\mathit{S}}^{{\mathit{\theta }}_{\mathbf{1}}},\mathbf{\dots },{\mathit{X}}_{\mathit{S}}^{{\mathit{\theta }}_{\mathit{N}}}$. The associated pixelwise mean and standard deviation are depicted on the right.