Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Hilar congestion is noted with mild interstitial pulmonary edema . Bibasilar opacities may represent atelectasis versus pneumonia . Small pleural effusions are also noted . Heart size can not be assessed . Mediastinal contour is stable . Bony structures appear intact .
    OUTPUT:
    
Mild pulmonary edema , small pleural effusions . Lower lobe opacities possibly representing atelectasis though difficult to exclude pneumonia .