What is the stage of DAI injury?

What is the stage of DAI injury?

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It is stage 3 diffuse axonal injury (DAI) .Sagittal T1-weighted magnetic resonance (A) demonstrates hemorrhagic contusions along the vertex. Axial T2-weighted, fast spin echo (B–D) images and fluid-attenuated inversion recovery (FLAIR) (E–G) images demonstrate focal lesions in the right lateral aspect of the brainstem and splenium of the corpus callosum and a hemorrhagic lesion in the body of the corpus callosum from severe DAI. Smaller DAI lesions are present in the supratentorial white matter as well.  FLAIR shows these lesions with apparently greater conspicuity. Primary brainstem DAI is invariably accompanied by similar lesions in the corpus callosum and deep lobar white matter (stage 3 DAI).

In patients with mild head trauma, DAI lesions may be confined to the white matter of the frontal and temporal lobes (stage 1) . Patients with more-severe rotational acceleration may develop lesions in the lobar white matter and the posterior half of the corpus callosum (stage 2).If the trauma is of even greater severity, DAI lesions is also  found in the dorsolateral aspect of the midbrain and upper pons (stage 3).