Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . Midline sternotomy wires , aortic valve replacement and upper to mid thoracic spinal hardware is again noted . The lungs are clear bilaterally without focal consolidation , effusion , or signs of CHF . Cardiomediastinal silhouette is stable . Bony structures appear intact .
    OUTPUT:
    
No acute intrathoracic process .