Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Catheter projects over the heart . Previously noted opacity in the right mid lung is decreased in conspicuity . Retrocardiac opacity may represent a left lower lobe pneumonia versus atelectasis . Small bilateral layering pleural effusions are noted . Cardiomediastinal silhouette is stable . Bony structures are intact .
    OUTPUT:
    
Small layering pleural effusions , retrocardiac opacity , question atelectasis versus pneumonia .