Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The chest is well expanded and clear . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is unremarkable . Sternotomy wires are noted . The most superior sternotomy wire appears to be small in size which may reflect remote sternotomy , correlate with clinical history . Ascending aorta appears either tortuous or dilated .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . Ascending aorta mildly dilated or tortuous .