Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: 2 views of the chest demonstrate clear lungs with no increase in interstitial markings . There is no pleural effusion or pneumothorax . The heart size is top normal , stable , and the hilar and mediastinal contours are stable with a tortuous thoracic aorta again noted .
    OUTPUT:
    
No acute cardiopulmonary abnormality .