Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear , although hyperexpanded . A slight increase in the radiodensity of the right hilus as compared to the prior radiograph is perhaps not of clinical significance , but if there is clinical concern , a CT could be used to better evaluate the airways . Cardiomediastinal silhouette is unremarkable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
1 ) Emphysema 2 ) Slight increase in the radiodensity of the right hilus . Evaluation of airways with chest CT can be considered if the clinical scenario justifies this .