FIG 4. 76-year-old woman with AD.

A, Gradient-echo M_o image (390/12/2), acquired without a radio frequency saturation pulse, shows moderate atrophy of the medial temporal lobe, graded as 3 using the visual rating scale.

B, M_s image, acquired with a radio frequency saturation pulse, shows slightly high signal intensity in areas of hippocampal formation (arrowheads).

C, Calculated MT ratio image shows slightly low signal intensity in areas of the hippocampus (arrowheads) (MT ratio = 34.2%).