Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright chest radiograph ___ at 23 : 19 is submitted .
    OUTPUT:
    
Lung volumes remain low with persistent bibasilar opacities favoring atelectasis . Probable layering right effusion . Increasing prominence of the interstitium likely reflects a component of superimposed interstitial edema . Clinical correlation is recommended . Overall cardiac and mediastinal contours are stable . No pneumothorax .