Fig. 1

Nuclear magnetic resonance imaging of the head and brain. a Gadolinium-enhanced T1-weighted imaging (Gd T1WI) at the time of admission showed right subdural empyema (white arrowhead, 106 × 33 × 53 mm) with mixed low intensity. b Gd T1WI after 3 weeks of treatment. The size of the abscess was not reduced (white arrowhead, 109 × 35 × 60 mm). c Gadolinium-enhanced T1-weighted imaging 2 weeks after the second drainage and antimicrobial drug change to meropenem. The abscess was decreased in size. d T1-weighted imaging without contrast, 1 year after the treatment. There was no recurrence of the abscess