This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Radiology Q Bank, Subject name: Radiology
A 40 year old man came to ER with loss of consciousness. Patient's relative gave a history of A. Patient is a known alcoholic and hypeensive. NCCT head was normal. GCS is 8. Urgent MRI is performed . Diagnosis is? 
Select and explain. 
A. Cerebral amyloid angiopathy, B. SAH, C. Diffuse axonal injury, D. SDH
C: Diffuse axonal injury
Answer: C: Diffuse axonal injury 
Explanation: MRI image shows multiple blooming foci noted diffusely involving the bilateral cerebral hemisphere predominantly at gray-white matter junction. Given the clinical history, most probable diagnosis DAI. Blooming aifact is a susceptibility aefact encountered on some MRI sequences in the presence parmagnetic substances that affect the local magnetic milieux. Although it is an aifact, it may be deliberately exploited to improve detection of ceain small lesions Cerebral amyloid angiopathy is seen old age .