Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest were provided . The heart is mildly enlarged , unchanged with an LV configuration . The lungs are clear . No pneumothorax or effusion . Linear density in the right mid lung is stable and likely representing scarring . The bony structures are intact .
    OUTPUT:
    
No acute intrathoracic injury .