Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy with intact median sternotomy wires and aortic valve replacement . Cardiac silhouette appears mildly enlarged but stable . Otherwise , the lungs are clear with no evidence of consolidation , effusion , or pneumothorax . Mild scarring is noted at the lung apices . Degenerative changes are visualized throughout the thoracolumbar spine .
    OUTPUT:
    
No acute cardiopulmonary process .