Imaging | Patterns |
---|---|
Wernicke's encephalopathy | |
CT | Hypodense paraventricular thalamic regions with or without contrast enhancement and, less frequent, hypodense periaqueductal regions, tectum of the midbrain and tegmentum of the pons |
MRI |
|
SPECT | Hypoperfusion frontoparietal and in the right basal ganglia |
Posterior reversible encephalopathy | |
CT | Hypodensities in the parieto-occipital subcortical white matter and cerebellum with increased cerebral blood volume, blood flow, and reduced time to peak mainly in the posterior vascular distribution |
MRI |
|
ADC, apparent diffusion coefficient; DWI, diffusion-weighted imaging; FLAIR, fluid-attenuated inversion recovery; MRS, MR spectroscopy; SPECT, single-photon emission CT.