Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . There is a hazy opacity in the base of the right lung , raising concern for aspiration or infection vs atelectasis . Cardiomediastinal silhouette is unremarkable . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
Hazy opacity in the base of the right lung could be due to aspiration or infection .