title: Utility of susceptibility-weighted imaging in Parkinson's disease and atypical Parkinsonian disorders.
abstract: In the clinic, the diagnosis of Parkinson's disease (PD) largely depends on clinicians' experience. When the diagnosis is made, approximately 80% of dopaminergic cells in the substantia nigra (SN) have been lost. Additionally, it is rather challenging to differentiate PD from atypical parkinsonian disorders (APD). Clinially-available 3T conventional MRI contributes little to solve these problems. The pathologic alterations of parkinsonism show abnormal brain iron deposition, and therefore susceptibility-weighted imaging (SWI), which is sensitive to iron concentration, has been applied to find iron-related lesions for the diagnosis and differentiation of PD in recent decades. Until now, the majority of research has revealed that in SWI the signal intensity changes in deep brain nuclei, such as the SN, the putamen (PUT), the globus pallidus (GP), the thalamus (TH), the red nucleus (RN) and the caudate nucleus (CN), thereby raising the possibility of early diagnosis and differentiation. Furthermore, the signal changes in SN, PUT and TH sub-regions may settle the issues with higher accuracy. In this article, we review the brain iron deposition of PD, MSA-P and PSP in SWI in the hope of exhibiting a profile of SWI features in PD, MSA and PSP and its clinical values.
authors.affiliation: Neurology Department, The First Affiliated Hospital of China Medical University, 155# Nanjing Bei Street Heping District, Shenyang, 110001 People's Republic of China.
authors.forename: Zhibin
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Neurology Department, The First Affiliated Hospital of China Medical University, 155# Nanjing Bei Street Heping District, Shenyang, 110001 People's Republic of China.
authors.forename: Xiao-Guang
authors.initials: XG
authors.lastname: Luo
authors.affiliation: Neurology Department, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Ruijin 2nd Road 197, Shanghai, 200025 People's Republic of China.
authors.forename: Chao
authors.initials: C
authors.lastname: Gao
keywords: Biomarker; Iron deposition; Multiple system atrophy Parkinsonian predominant type; Parkinson’s disease; Progressive supranuclear palsy; Susceptibility-weighted imaging