Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Small to moderate left pleural effusion persists and appears increased with overlying atelectasis . Trace right pleural effusion may also be present . There is moderate enlargement of the cardiac silhouette . Aortic knob is calcified . Minimal prominence of the interstitial markings may be due to minimal interstitial edema .
    OUTPUT:
    
Moderate left pleural effusion and likely trace right pleural effusion . Moderate enlargement of the cardiac silhouette and slight prominence of the interstitial markings may be due to mild interstitial edema .