Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained demonstrating midline sternotomy wires and mediastinal clips likely relating to prior CABG . The heart size appears within normal limits . Lungs appear essentially clear bilaterally without focal consolidation , effusion , or pneumothorax seen . Mediastinal contour is unremarkable . Bony structures appear intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
No acute intrathoracic process .