Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-erect chest radiograph ___ at 04 :59 is submitted .
    OUTPUT:
    
Tracheostomy tube continues to have its tip 1 .2 cm above the carina . A right internal jugular central line has its tip in the distal SVC . The heart remains stably enlarged . There is a layering left effusion with retrocardiac consolidation suggestive of compressive lower lobe atelectasis , although pneumonia should also be considered . There has been interval appearance of mild perihilar edema . No obvious pneumothorax .