Abstract
Objectives
The purpose of this study was to assess the reproducibility of substantia nigra pars compacta (SNpc) and locus coeruleus (LC) delineation and measurement with neuromelanin-sensitive MRI.
Materials and methods
Eleven subjects underwent two neuromelanin-sensitive MRI scans. SNpc and LC volumes were extracted for each scan. Reproducibility of volume and magnetization transfer contrast measurements in SNpc and LC was assessed using intraclass correlation coefficients (ICC) and dice similarity coefficients (DSC).
Results
SNpc and LC volume measurements showed excellent reproducibility (SNpc-ICC: 0.94, p < 0.001; LC-ICC: 0.96, p < 0.001). SNpc and LC were accurately delineated between scans (SNpc-DSC: 0.80 ± 0.03; LC-DSC: 0.63 ± 0.07).
Conclusion
Neuromelanin-sensitive MRI can consistently delineate SNpc and LC.
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Acknowledgments
This work was partially supported by the Michael J. Fox Foundation (MJF 10854) and by Siemens Healthcare.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Informed consent was obtained from all individual participants included in the study.
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Langley, J., Huddleston, D.E., Liu, C.J. et al. Reproducibility of locus coeruleus and substantia nigra imaging with neuromelanin sensitive MRI. Magn Reson Mater Phy 30, 121–125 (2017). https://doi.org/10.1007/s10334-016-0590-z
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DOI: https://doi.org/10.1007/s10334-016-0590-z