Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperexpanded . Linear opacities over the right middle lobe most likely represent atelectasis , present on prior studies . No pleural effusion or pneumothorax is identified . The cardiac contours are normal . Hilar lobulations due to hilar adenopathy , unchanged over multiple prior studies .
    OUTPUT:
    
Hyperexpanded lungs consistent with an acute asthma exacerbation .