Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is of focal opacity at the right lung base concerning for pneumonia . Diffuse severe background interstitial lung disease is overall unchanged . The cardiac silhouette is normal . There is no pleural effusion or pneumothorax . Tracheostomy tube terminates at the thoracic inlet , unchanged . No acute osseous abnormality is identified .
    OUTPUT:
    
Focal opacity at the right lung base concerning for pneumonia . Diffuse background interstitial lung disease , potentially caused by chronic underlying infection .