Abstract
Neuromelanin, a black pigment present in dopaminergic and noradrenergic neurons in the substantia nigra pars compacta (SNc) and locus ceruleus (LC), has paramagnetic T1-shortening effects. Conventional magnetic resonance imaging (cMRI) techniques fail to depict the contrast generated by neuromelanin, but there are some neuromelanin-sensitive techniques that allow direct visualization of the SNc and LC as evident high-signal areas. In Parkinson disease, neuromelanin-related signals from the SNc and LC are attenuated suggesting neuronal loss in both these nuclei. In other neurodegenerative and psychiatric disorders, signal alterations of SNc and/or LC can also be shown. Neuromelanin-sensitive MRI is a promising technique to assess changes in these nuclei that occur in Parkinson disease and other related disorders.
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This work was partly supported by a grant-in-aid for Advanced Medical Science Research from the Ministry of Education, Culture, Sports, Science, and Technology of Japan.
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Sasaki, M., Yamashita, F., Kudo, K. (2013). Neuromelanin Imaging in Parkinson Disease. In: Nahab, F., Hattori, N. (eds) Neuroimaging of Movement Disorders. Current Clinical Neurology, vol 44. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-62703-471-5_10
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DOI: https://doi.org/10.1007/978-1-62703-471-5_10
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