FIG 7. Schematic drawings of the multiplanar localization of the area of hyperintense gray matter on proton density-weighted and fast STIR images and of the hypointense area on the T2-weighted images (shaded area). The hypointense area on the T2-weighted image includes the crural fibers and only the anterosuperior potion of the SN. The dotted line indicates the presumable boundary between the SNr and the SNc.

A, Axial plane through the upper and lower midbrain.

B, Sagittal plane.

C, Coronal plane.

D, Oblique coronal plane.