Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low , which results in crowding of the bronchovascular structures . There is no pleural effusion or pneumothorax . There is prominence of the central vasculature without evidence for overt pulmonary edema . The mediastinal and hilar contours are unchanged , with a tortuous thoracic aorta . The heart size is mildly enlarged .
    OUTPUT:
    
No acute cardiopulmonary process .