Neurological Sciences

, Volume 40, Issue 12, pp 2479–2489 | Cite as

The diagnostic value of SNpc using NM-MRI in Parkinson’s disease: meta-analysis

  • Xiangming Wang
  • Yuehui Zhang
  • Chen Zhu
  • Guangzong Li
  • Jie Kang
  • Fang Chen
  • Ling YangEmail author
Review Article


The main purpose of this study was to systematically evaluate the accuracy of neuromelanin-sensitive magnetic resonance imaging (NM-MRI) in Parkinson’s disease (PD) diagnosis using a meta-analysis method. In PubMed, Web of Science, Embase, and Google Scholar, the literatures were searched for the diagnostic value of neuromelanin-sensitive magnetic resonance imaging in PD. The literatures were screened in the light of Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA). Data analysis was processed by Stata 12.0 software to obtain meta-analysis, heterogeneity analysis, and publication bias. Meta-analysis results showed by using NM-MRI observed substantia nigra pars compacta (SNpc) on PD, the pooled diagnostic sensitivity and specificity were 0.82 (95% CI, 0.74–0.87) and 0.82 (95% CI, 0.73–0.89), respectively. And the pooled positive likelihood ratio (PLR) and negative likelihood ratio (NLR) were 4.58 (95% CI, 3.08–6.82) and 0.22 (95% CI, 0.16–0.31), respectively. Moreover, subgroup analysis according to the measurement criteria of SNpc showed the SNpc volume should be used as good a marker for diagnosing PD. Finally, Fagan test demonstrated that when PLR was equal to 5, the posterior probability is significantly enhanced to 53%, compared with prior probability (20%). As for NLR (0.22), the prior probability is 20%, while the posterior probability remarkably dropped to 5%. In conclusion, SNpc signal detected by NM-MRI exhibited high sensitivity and specificity for diagnosis of PD, which was a high-performance imaging diagnostic method for PD. We recommend NM-MRI imaging technology to be widely used in Parkinson’s diagnosis.


Parkinson’s disease Neuromelanin-sensitive magnetic resonance imaging (NM-MRI) Meta-analysis Diagnostic method 


Compliance with ethical standards

The study was based on Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. The searched documents are gradually screened from the title, abstract, and full text according to the pre-set inclusion exclusion criteria. The two researchers conducted the same discussion at the same time. When there is controversy, it should be judged by the third researcher.

Conflict of interests

The authors declare they have no conflict of interests.


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Copyright information

© Fondazione Società Italiana di Neurologia 2019
corrected publication 2019

Authors and Affiliations

  1. 1.Department of NeurologyPanzhihua Central HospitalPanzhihua CityPeople’s Republic of China

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