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FIG 1. Images acquired on hospital day 5 during the early stage of left orbitofrontal cerebritis.
A, FLAIR image (8000/105 [TR/TE]; TI, 2500) shows hyperintense subcortical white matter of left frontal lobe (arrow).
B, Postcontrast T1-weighted image (650/17) shows no contrast enhancement around an ill-defined hypointense area (arrow). Note mucosal enhancement in left frontal sinus (white arrow).
C, DW image (b = 1000 s/mm2) shows hyperintense signal (arrow) in frontal cerebritis.
D, ADC map shows hypointense signal intensity (arrow) indicating restricted water diffusion. Mean ADC is 0.41 ± 0.04 (10-3mm2/s).
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