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 are unchanged . The lungs are clear bilaterally . No effusion or pneumothorax is seen . The cardiomediastinal silhouette appears stable with atherosclerotic calcifications along the thoracic aorta . The bony structures appear intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
No acute intrathoracic process .