Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated with flattening of the diaphragm . The cardiomediastinal silhouette , hilar contours , and pleural surfaces are normal . No pneumonia , pleural effusion , pulmonary edema , or pneumothorax . Note is again made of a chronically tortuous or dilated aorta .
    OUTPUT:
    
1 . Hyperinflated lungs with flattening of the diaphragm may be due to emphysema or small airways obstruction . 2 . Chronically tortuous or dilated aorta .