Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is unchanged , likely top normal . The mediastinal and hilar contours are stable . Moderate - sized left pleural effusion appears unchanged . There is associated left basilar opacity likely reflecting compressive atelectasis . A trace right pleural effusion appears resolved . The right lung is clear . No pulmonary vascular engorgement or pneumothorax is identified . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
No change in left moderate - sized pleural effusion and left basilar compressive atelectasis .