Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided demonstrate midline sternotomy wires and mediastinal clips . The heart is top normal in size . Lungs are clear . No signs of pneumonia or CHF . No pleural effusion or pneumothorax . The bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
No acute intrathoracic process .