Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single supine view of the chest . Lower lung volumes seen on the current exam . The lungs are grossly clear . The cardiomediastinal silhouette is stable . Tortuous descending thoracic aorta is again seen . Median sternotomy wires and mediastinal clips are again noted .
    OUTPUT:
    
No definite acute cardiopulmonary process .