Imaging of substantia nigra in parkinson’s disease: A narrative review

Massimo Midiri, Maurizio Marrale, Eleonora Bruno, Giuseppe La Tona, Cesare Gagliardo, Roberto Monastero, Paola Feraco, Benedetto Petralia, Anna Del Poggio, Roberta Baschi, Maria Chiara Malaguti, Laura Geraci, Costanza D’Angelo, Eleonora Bruno, Cesare Gagliardo, Roberto Monastero, Giuseppe La Tona, Massimo Midiri, Bernardo Petralia, Costanza D'AngeloRoberta Baschi

Risultato della ricerca: Articlepeer review

Abstract

Parkinson’s disease (PD) is a progressive neurodegenerative disorder, characterized by motor and non-motor symptoms due to the degeneration of the pars compacta of the substantia nigra (SNc) with dopaminergic denervation of the striatum. Although the diagnosis of PD is principally based on a clinical assessment, great efforts have been expended over the past two decades to evaluate reliable biomarkers for PD. Among these biomarkers, magnetic resonance imaging (MRI)-based biomarkers may play a key role. Conventional MRI sequences are considered by many in the field to have low sensitivity, while advanced pulse sequences and ultra-high-field MRI techniques have brought many advantages, particularly regarding the study of brainstem and subcortical structures. Nowadays, nigrosome imaging, neuromelanine-sensitive sequences, iron-sensitive sequences, and advanced diffusion weighted imaging techniques afford new insights to the non-invasive study of the SNc. The use of these imaging methods, alone or in combination, may also help to discriminate PD patients from control patients, in addition to discriminating atypical parkinsonian syndromes (PS). A total of 92 articles were identified from an extensive review of the literature on PubMed in order to ascertain the-state-of-the-art of MRI techniques, as applied to the study of SNc in PD patients, as well as their potential future applications as imaging biomarkers of disease. Whilst none of these MRI-imaging biomarkers could be successfully validated for routine clinical practice, in achieving high levels of accuracy and reproducibility in the diagnosis of PD, a multimodal MRI-PD protocol may assist neuroradiologists and clinicians in the early and differential diagnosis of a wide spectrum of neurodegenerative disorders.
Lingua originaleEnglish
pagine (da-a)769-
Numero di pagine14
RivistaBrain Sciences
Volume11
Stato di pubblicazionePublished - 2021

All Science Journal Classification (ASJC) codes

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