Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-erect chest film ___ at 04 : 19 is submitted .
    OUTPUT:
    
Tracheostomy tube remains in satisfactory position . Given differences in technique , there is a in diffuse bilateral airspace opacities which may represent edema , layering effusions with compressive atelectasis , or ARDS . Clinical correlation is advised . Overall cardiac and mediastinal contours appear stably enlarged . No obvious pneumothorax .