Pictures of the brain: what are they and what do they tell us?
CT, CTA, MRI, MRA, fMRI, PET are an alphabet soup of brain tests that might be used in evaluation of a person suspected of possibly having Alzheimer’s disease. I would like to define and describe each of these tests and then briefly explain how each one might be used.
CT stands for computerized tomography and it, as with the other acronyms, is usually followed by the word scan. This terminology represents the same thing...

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