Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Tracheostomy tube in situ with the tip 5 .0 cm proximal to the carina . Right - sided PICC line in situ with the tip at the cavoatrial junction . Diffuse airspace opacification again noted appearing slightly more radiodense , but this may be secondary to the lower lung volumes . No pneumothorax .
    OUTPUT:
    
Diffuse airspace opacification appears essentially similar to radiograph done yesterday and may represent a combination of pneumonia and edema . .