Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated . A linear opacity with some associated volume loss in the right upper lobe is unchanged from the prior radiograph . This likely scarring . No new opacity is identified to suggest pneumonia . There is no pulmonary edema , pleural effusion , or pneumothorax . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
Hyperexpanded lungs . No evidence of pneumonia . A linear opacity in the right upper lobe is likely scarring , though could be further assessed with a CT if clinically indicated .