X-ray
AP semi-erect radiograph.
There is bilateral and symmetric upper lobe air space opacification, and increased density behind the heart with some air bronchograms.
The appearances in the left lower zone are most likely due to aspiration, as could the bilateral upper zone changes. However, I note the patient has had a subarachnoid haemorrhage, and the bilateral upper lobe appearances could represent with non-cardiogenic pulmonary oedema. The final differential would be infection.