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Pittsburgh Compound B (a fluorescent dye ) positron emission tomography (PET) image of normal control, mild cognitive impairment (MCI) and Alzheimer's disease (AD) subjects showing a range of amyloid-B deposition (the main component of deposits found in the brains of patients with Alzheimer's disease).

Note: Images are shown for illustrative purposes. Do not attempt to draw conclusions or make diagnoses by comparing these images to other medical images, particularly your own. Only qualified physicians should interpret images; the radiologist is the physician expert trained in medical imaging.