Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Moderate enlargement of the cardiac silhouette is again demonstrated . Mediastinal and hilar contours are unchanged . Crowding of the bronchovascular structures is present with mild pulmonary vascular engorgement , but this is improved compared to the previous exam . Increased interstitial opacities are most pronounced at the lung bases , likely reflective of chronic interstitial abnormality with associated atelectasis . Small bilateral pleural effusions may be present . No pneumothorax is identified . Multiple bilateral rib fractures are again noted .
    OUTPUT:
    
Increased interstitial opacities at the lung bases may reflect chronic interstitial abnormality with atelectasis . Mild pulmonary vascular congestion , slightly improved from the previous study , with probable trace bilateral pleural effusions .