Hello.Thanks for the question.1Frontal lobe
hypodensities are commonly due to chronic ischemia
of white matter
.In layman's term this is suggestive of reduced blood supply to brain and micro-strokes in this region.2. Calcification is normal with aging.This doesn't cause any symptoms or need any treatment.3 Dilatation of sulci and ventricles means atrophy
of brain that is reduction in volume of brain.It's feature of ageing.There is no major risk involved with this feature.You can discuss with your doctor and undertake lifestyle changes to prevent further changes.Sometimes doctor might put you on few prophylactic medications.If there are other health issues like hypertension
or increased lipids, then they should be effectively treated. Hope this answers your question.Thank you.