Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Midline sternotomy wires and a prosthetic cardiac valve are again seen . Cardiomediastinal silhouette is stable . Lungs are clear bilaterally . There is no focal consolidation , effusion , or pneumothorax . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
No acute intrathoracic process .