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NM‐MRI of the substantia nigra. (a) An individual example of the three NM‐MRI sequences. (b) Manual segmentation of subsantia nigra (SN) and crus cerebri (CC) mask on a standardized image in MNI space. The mask of the SN is shown in red and the mask of the CC in blue. GRE: gradient recalled echo; MT: magnetization transfer pulse; TSE: turbo spin echo.
