This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Radiology
Diffusion-weighted imaging typically shows bright signal suggestive of diffusion restriction in all the following except 
Select and explain. 
A. CNS lymphoma, B. Alzheimer's disease, C. MCA territory infarct, D. Brain abscess
B: Alzheimer's disease
Answer: B: Alzheimer's disease 
Explanation: .