Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP semi erect view of the chest provided . Airspace opacity in the right lower lung is concerning for pneumonia . Subtle opacity also seen at the left lung base , concerning for atelectasis versus pneumonia . Hilar congestion is noted . Difficult to exclude a component of pulmonary edema . Small right pleural effusion is present . No large pneumothorax . Mediastinal contours are stable . Bony structures are intact .
    OUTPUT:
    
Lower lung opacities concerning for pneumonia with small right pleural effusion . Hilar congestion with possible mild pulmonary edema .