Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior radiograph , lung volumes are slightly lower . The right IJ central line has been removed . The right lung is clear . No pneumothorax . Bilateral small pleural effusions are unchanged . Intact median sternotomy wires .
    OUTPUT:
    
1 . Median sternotomy wires are intact . 2 . Small bilateral pleural effusions are unchanged .