 Brain MRI:When comparing supratentorial brain to infratentorial posterior fossa structures, there is a diffuse and global low level of diffusion restriction more prominently involving cortices. Previously identified subdural hemorrhages along the convexities bilaterally as well as adjacent to the falx and tentorium are again noted, better demonstrated on prior CT. The FLAIR technique best demonstrates that there is scattered subarachnoid hemorrhage throughout the supratentorial compartment. There are no masses, mass effect, or midline shift. Prominence of the CSF spaces around the cerebellum are noted, of uncertain significance. The ventricles are normal in size and shape without evidence of hydrocephalus. The cerebellar tonsils are in appropriate position. Fluid is noted within the mastoid air cells and middle ear cavities. Susceptibility at the right paramedian vertex is suggestive of a monitoring device.Brain MRA: There is antegrade flow within the distal bilateral vertebral arteries, within the basilar artery, distal bilateral internal carotid arteries and carotid siphons and bilateral anterior, middle and posterior cerebral arteries. No arterial stenoses, occlusions or aneurysms are identified. Neck MRA: The study is limited by motion degradation. Given this caveat:There are is antegrade flow within the bilateral carotid and vertebral artery systems. There are no stenoses of the bilateral common, internal or external carotid arteries or of the bilateral carotid bifurcations. There are no MRI findings of dissection.
1.The constellation of MRI features is most consistent with anoxic injury with a low level of global supratentorial restricted diffusion, primarily involving cortices.2.Subdural hemorrhages along the convexities bilaterally as well as adjacent to the falx and tentorium are again noted.3.There is scattered subarachnoid hemorrhage throughout the supratentorial compartment.4.Negative MRA of the brain.5.Negative MRA of the neck.