Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are slightly hyperinflated . The lungs and pleural spaces are essentially clear without evidence of pneumothorax or pleural effusions . Biapical scarring is present and better characterized on the prior CT exam . The previously identified lung nodules are better characterized on the prior CT . Heart size is normal . Osseous structures are grossly intact .
    OUTPUT:
    
No acute intrathoracic process .