Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chest PA and lateral radiograph demonstrates a slightly prominent main pulmonary contour . Hilar and cardiac contours are unremarkable . Lungs are clear . No pleural effusion or pneumothorax . No osseous abnormality is identified .
    OUTPUT:
    
Prominent main pulmonary artery may be a normal finding , though in clinical setting of heart murmur , could be associated with pulmonary stenosis . No evidence of tuberculosis .