In both subjects, the ventral hypointense layers visible in the T2*WI images extended anteriorly to the crus cerebri (Fig. 1). This signal hypointensity was more prominent in the medial aspect. The boundaries between the SNr and the SNc were difficult to draw regardless of the imaging sequence. We could not find a signal-intensity difference leading to a delineation of these areas. The lateral SN showed hyperintensity relative to the medial areas in the T2*WI sequence.