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Innumerable punctate foci of susceptibility artifact are present throughout the cerebellar hemispheres, pons and midbrain, corpus callosum (particularly within the splenium), periventricular and subcortical white matter and the posterior frontal and parietal cortex, best seen on the susceptibility-weighted sequence. Numerous foci of diffusion restriction are present within the same regions, notably the left cerebellar hemisphere, bilateral periventricular white matter and frontal and parietal cortices. No filling defects, beading or aneurysm identified within the circle of Willis. No hydrocephalus or extra-axial fluid collection identified. The visualised orbits and paranasal sinuses are unremarkable.