non-contrast brain ct Indication: G20 parkinson s disease, sp dos Findings: Postoperative changes status post bilateral deep basal ganglia stimulator lead placement with tips in the cerebral peduncles. Extra-axial fluid collection, nondependent pneumocephalus; No hemorrhage, extra-axial fluld collection, cerebral edema, acute cortical infarction, mass, mass effect, midline shift - what does this mean?