Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette is normal . The lungs are mildly hyperinflated . There is no pleural effusion or pneumothorax . There is a linear left basilar opacity , which has increased when compared to ___ .
    OUTPUT:
    
Increase left basilar opacity compared to ___ , findings consistent with atelectasis versus pneumonia .