Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size and cardiomediastinal contours are normal . Lung volumes are low . Small right lung base opacity is concerning for infection , less likely atelectasis . There is also vague opacity in the right middle lobe seen on the lateral view . There is small left lung base atelectasis . No pleural effusion or pneumothorax . Sternotomy wires and mediastinal clips are intact .
    OUTPUT:
    
Small right mid and lower lung opacity concerning for infection .