tokens: Initial brain magnetic resonance imaging ( MRI ) were obtained after the hospitalization , including DWI ( 8 / 8 ), apparent diffusion coefficient ( ADC ) map ( 4 / 8 ), FLAIR ( 7 / 8 ), and T2 - weighted image ( 8 / 8 ). Follow - up MRIs were performed on 5 patients from third to 14th days after discontinuation of metronidazole administration .