Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild enlargement of the cardiac silhouette persists . The mediastinal and hilar contours are unchanged , with atherosclerotic calcifications noted in the aortic knob . The pulmonary vasculature is not engorged . A small left pleural effusion was present on the previous chest CT , but new from the prior chest radiograph . There is associated left lower lobe compressive atelectasis . Remainder of the lungs are hyperinflated without focal consolidation . No pneumothorax is present . A 1 .7 cm linear radiopaque density projects over the left lateral chest wall unchanged from ___ , likely a foreign body .
    OUTPUT:
    
Small left pleural effusion with compressive left lower lobe atelectasis .