Conventional magnetic resonance imaging cannot reliably differentiate Parkinson’s disease (PD) from essential tremors (ET). Magnetic resonance fingerprinting (MRF) can simultaneously acquire T1 and T2 relaxometry. This study utilized MRF to obtain T1 and T2 values in substantia nigra (SN) of patients with tremor-dominant PD and ET. The T1 values of SN were significantly higher in patients with tremor-dominant PD than those with ET, whereas the T2 values showed no significant differences between groups. The findings suggest that MRF T1 mapping of the SN can potentially differentiate tremor-dominant PD from ET
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