Fig. 6.1
Hyperintense lacunar infarct in the left lateral sulcus on diffusion-weighted images (a hollow arrow). It is associated with multiple lacunar infarct sequelae as “holes” in the brain parenchyma, hypointense on FLAIR imaging with a more or less intense hyperintense corona (b and c arrows) and hypodense on CT (d arrow)
Diffuse periventricular hypodensities when associated with leukoaraiosis.
MRI
Variable signal depending on the age of the lesion; gradual progression towards a “hole” in the brain parenchyma:
acute lesion: focal hyperintensity on FLAIR and T2 images and normal or decreased ADC. Perfusion-weighted imaging often shows minor and very focal changes with increased MTT and decreased CBV; no penumbra.Related posts:
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