Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated but clear . The previously seen right upper lung opacity is less prominent on this exam . There is no pneumothorax or pleural effusion . Biapical pleural scarring is unchanged , right greater than left . The heart and mediastinum are within normal limits .
    OUTPUT:
    
Hyperinflated but clear lungs . However , if clinical suspicion for infection remains high , a dedicated chest CT may be performed for further evaluation .