Figure 1.

A flowchart illustrating the enrollment of participants, composed of 46 symptomatic post-COVID-19 patients (s) and 55 volunteers with either no history of COVID-19 infection or unawareness of such history. Based on the recommendation of an experienced radiologist after reviewing the MR data, two volunteers and five patients were excluded from the study. Based on COVID-19 antibody testing, volunteers were divided into two groups: asymptomatic patients (a) who had a history of infection without symptoms, and healthy controls (c) with no history of COVID-19 infection. In symptomatic patients, the experienced neurological symptoms are documented. COVID-19, coronavirus disease 2019; MR, magnetic resonance.