Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest were provided . Midline sternotomy wires and mediastinal clips are again noted . The lungs are clear . Heart size is top normal . Mediastinal contour is unremarkable . No pleural effusion or pneumothorax is seen . Imaged osseous structures are intact . DISH - related changes of the lower T spine noted .
    OUTPUT:
    
No acute intrathoracic process .