Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild to moderate enlargement of the cardiac silhouette is unchanged . The mediastinal and hilar contours are similar . No pulmonary vascular congestion is visualized . Subtle increased interstitial opacities are demonstrated diffusely within the lungs , likely reflective of known chronic interstitial lung disease and chronic airways disease , better assessed on the previous chest CT . Atelectasis is also noted in both lung bases . No focal consolidation , pleural effusion or pneumothorax is present . No acute osseous abnormality is visualized .
    OUTPUT:
    
Mild chronic interstitial abnormality better assessed on the previous chest CT from ___ . No focal consolidation to suggest pneumonia . Bibasilar atelectasis .