Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is mildly enlarged but unchanged . Mediastinal and hilar contours are stable with atherosclerotic calcifications noted within the aortic arch . Pulmonary vasculature is not engorged . Lungs remain hyperinflated . There are continued bilateral increased interstitial opacities predominately along the periphery , likely reflective of chronic changes , without focal consolidation . No pleural effusion or pneumothorax is present . Mild degenerative changes are noted throughout the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Mild chronic interstitial abnormality .