Afraid of dads CT Scan report. Grace me.

NCCT scan of Brain reveals : 1. Thin hypodense collection is noted in right parietal convexity of 7-8mm thickness -Sub-dural hygroma vs chronic SDH 2. Periventricular ischemic demyelination changes. 3. Age related cerebral parenchymal atrophy. 4. PNS reveals mild DNS to left side, with inflammatory mucosal thickening in B/L ethmoidal sinuses. My father, 66 years old, recently had a situation of dizziness and almost faint followed by vomiting half an hour later. Instantly he was feeling like indigestion, blood sugar was normal and BP 110/70 and he got stable in hours. He was suggested NC CT Scan of brain the findings of which are mentioned above. He is a patient of hypertension, diabetes, CKD. His CBC, Echo, ECG, Thyroid, USG are all normal. He has no physical or cognitional symptoms. I'm scared of his CT scan findings. Please guide and grace me.