Fig. 5. Nigrosome imaging in iRBD.
A. Nigrosome 1 hyperintensity (arrows) is preserved in a 74-year-old female patient diagnosed with iRBD.
B. On the other hand, nigrosome 1 hyperintensity is lost bilaterally in another 82-year-old male patient with iRBD.
iRBD = isolated rapid eye movement sleep behavior disorder