Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Cardiomediastinal silhouette and hilar contours are unremarkable . Lung volumes are low , accentuating the pulmonary vasculature . Generalized interstitial abnormality is mild . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Mild generalized interstitial abnormality is likely a chronic finding and should be assessed by non-urgent CT .