Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , which results in bronchovascular crowding . An area of increased density at the left base likely represents a sclerotic focus in left ninth rib . The heart is not enlarged . The aorta is tortuous . No pneumothorax or pleural effusion .
    OUTPUT:
    
No acute cardiopulmonary process .