Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left pectoral pacemaker with leads that are intact and appropriately positioned . Sternotomy wires are also intact and appropriately positioned . Linear opacities within the left lower lung likely reflect atelectasis or scarring . No additional focal consolidations . No pulmonary edema . Stable enlargement of the cardiomediastinal silhouette with calcifications of the aortic knob . Stable enlargement of the right hilum . Small left pleural effusion . No pneumothorax .
    OUTPUT:
    
Small left pleural effusion . No evidence of pneumonia .