Fig. 4. 29-year-old female patient with diffuse axonal injury lesion.

Patient was involved in motor vehicle accident 9 days ago.

A, B. Axial FLAIR (A) and DWI (B) images show hyperintense lesion in splenial portion of corpus callosum (arrows). Lesion is more conspicuously demonstrated on DWI than on FLAIR image. C. ADC map image reveals restricted water diffusion of lesion (arrow). D. On follow-up FLAIR image obtained 17 months later, splenial lesion has disappeared. ADC = apparent diffusion coeffcient, DWI = diffusion-weighted image, FLAIR = fluid-attenuated inversion recovery