Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy . Median sternotomy wires are intact . The lungs are well expanded and clear . There are no focal air space opacity to suggest pneumonia . The heart is top normal . The mediastinal silhouette , hilar contours , and pleural surfaces are normal . There is no pleural effusion or pneumothorax present .
    OUTPUT:
    
No evidence of acute intrathoracic process , pneumonia or pneumothorax .