ALZHEIMER DISEASE, MRI. ALZHEIMER DISEASE, MRI Department of morphological and functional imaging, led by Professor Fredy, at the Pitié Salpêtrière Hospital in Paris, France. At left, MRI-T1. Axial cut-away at the level of cerebral peduncles passing through the two temporal lobes. Temporal cerebellar tonsil apparently normal. At right, diffusion tensor MRI, which assesses the activity of the fibers connecting the basal ganglia, reveals the cerebellar tonsils´ loss of function. Diagnosis of pr