Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is again mild moderate elevation of the right hemidiaphragm . The heart is normal in size . The aortic arch is calcified . The main pulmonary artery contour is mildly prominent , and mild right pulmonary artery enlargement is also suggested by the lateral view . Trace pleural effusions are suspected . There is no pneumothorax . The lungs appear clear .
    OUTPUT:
    
No evidence of pneumonia . Trace suspected pleural effusions . Prominent central pulmonary arteries .