Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Prominent bilateral interstitial markings most notably at the lung bases are unchanged since the study of 2 days ago , and are likely due to emphysema which was partially imaged on the recent cervical spine CT . There is no new consolidation , pleural effusion or pneumothorax . The heart and mediastinum are within normal limits . Regional bones and soft tissues are unremarkable .
    OUTPUT:
    
Emphysema with no acute process .