Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear with no evidence of consolidation , effusion , or pneumothorax . Prominence of the aortopulmonary window is again noted and likely representative of enlargement of the main pulmonary artery . The cardiomediastinal silhouette is stable with lead AICD in place . Degenerative changes are again visualized involving the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary process .