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 within normal limits . Pulmonary vasculature is not engorged . Small bilateral pleural effusions are not substantially changed in the interval . There is minimal associated atelectasis in the lung bases without focal consolidation . No pleural effusion or pneumothorax is demonstrated . No acute osseous abnormalities seen .
    OUTPUT:
    
Mild bilateral pleural effusion , unchanged .