Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . There is prominence of the main pulmonary artery . The pulmonary vasculature is normal . Lungs are clear . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
1 . No evidence of current or past TB . 2 . Prominence of the main pulmonary artery , which could be normal . However , may suggest pulmonic stenosis in the appropriate clinical setting .