Have some mild cognitive impairment trying to remember dementia patterns on imaging? Is looking at dementia PET scans one of your PET peeves? Have short-term memory loss when you read about dementia imaging? Here's a way to remember dementia patterns so you will never forget! Major dementia imaging patterns:... Alzheimer's disease (AD) · AD has a Nike swoosh pattern-with decreased metabolism in parietal & temporal regions · Remember when you see the Nike swoosh patter, just call it! Dementia w/Lewy Bodies (DLB) · Temporoparietal hypometabolism like AD but also involves occipital cortex, specific for DLB. · DLB also extends farther to the ant. temporal cortex. · Remember, regions of hypometabolism look more like an L. And Lewy starts w/an L Frontotemporal Dementia (FTD) · Frontal & temporal hypometabolism as expected, but extends along the anterior cingulate gyrus · Anterior cingulate involvement makes the hypometabolism looks like a lowercase letter f-and frontotemporal starts with f Posterior cortical atrophy · Can be from AD or DLB & has hypometabolism in the occipital & post. temporal lobe, sparing the anterior temporal lobe · Sparing the anterior temporal lobe makes the involvement look like a C instead of an L like DLB. · So remember pCa Vascular dementia · Vascular dementia has a variable distribution, depending on the regions infarcted (V is both for Vascular & Variable) · Wedged shaped regions of hypometabolism corresponding to cortical infarcts-looks like an inverted V This list isn't all inclusive & there can be variations or even mixed dementias But hopefully this gives you a starting point you won't soon forget!show more

Lea Alhilali, MD

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