Conversation: The conversation between human and AI assistant.
[|Human|] What does the following MRI of the brain report mean? There is a small chronic lacunar infarct versus a dilated perivascular space in the posterior left centrum semiolale. A small chronic lacunar infarct in the left thalamus is observed. There is no evidence of restricted diffusion to suggest acute infarction in the brain parenchyma. There is a mildly prominent CSF overlying the cerebral hemispheres secondary to moderate generalized cerebral and cerebellar volume loss rathat than subdural hygromas. The ventricles and basilar cisterns are normal in size.
[|AI|]  Lacuna infarction are ischemic brain lesions less than 1 cm in diameter. The first one described is not sure to be an infarction as it can also be a dilated perivascular space, witch can be a variation of normal anatomy or changes through a persons' life. I don't understand well the sentence before the last, but I suppose it's a brain atrophy caused by an old subdural hemorrhage. You should see a neurologist to value the risk factors for cerebral vascular disease and to treat the patient properly.