In Vivo 7T MRI of the Non-Human Primate Brainstem
Fig 5
Comparisons of SWI normalized pixel intensity across brainstem regions and rhesus macaques.
(A) Analysis of three paired brainstem nuclei and adjacent fiber tracts, each corresponding to an investigational target for DBS therapy. Pixel intensity values were calculated by averaging pixel intensities for each region (0 = black, 255 = white) from the raw SWI scans and dividing by the average pixel intensity values of the anterior commissure about the midline. Columnar intensity values are plotted in age order with white being the youngest and black being the oldest subject. (B) Example of age-dependent SWI pixel intensity across basal ganglia, thalamus, and brainstem structures.