Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Opacity in the right lower lobe and possibly right middle lobe with silhouetting of the right hemidiaphragm consistent with pneumonia . Opacity in the left lower lobe is also consistent with pneumonia . There is mild atelectasis bilaterally . No effusion or pneumothorax . No edema . Heart size is normal .
    OUTPUT:
    
Bilateral pneumonia involving the right lower and middle lobes as well as left lower lobe .