New large left frontoparietal parenchymal haemorrhage (54 x 34 x 55 mm results in midline shift to the right of 6 mm (previously there was no midline shift). This appears separate to the previous left frontal haemorrhage. There is also further subarachnoid haemorrhage at the vertex. No CTA spot sign.
Normal aortic arch anatomy. Common carotid and internal carotid arteries are patent with no dissection. Vertebral arteries are patent with no dissection. Normal circle of Willis anatomy. No aneurysms, filling defects or vascular malformations are identified.
ETT positioned appropriately. Apical subpleural blebs. Nasogastric tube is noted.
Conclusion: Large left frontoparietal parenchymal haemorrhage with subarachnoid extension has developed since the CT at 09:56 this morning with new midline shift to the right. No basilar artery thrombus.