Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Stable post sternotomy changes . The mediastinal contour appears similar compared to the previous radiograph . Linear atelectatic changes with volume loss involving the left lower lobe unchanged . Mild elevation of the left hemidiaphragm . Increase in the AP diameter of the chest suggest pulmonary overinflation . Spondylotic changes of the thoracic spine . No pneumothorax .
    OUTPUT:
    
No significant interval change or complication .