Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy . The cardiomediastinal and hilar contours are within normal limits . Of note , a linear opacity adjacent to the left heart border likely represents a focus of scarring . Lungs are mildly hyperinflated . No consolidation , effusion or pneumothorax .
    OUTPUT:
    
No acute intrathoracic process .