Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours stable , with mild cardiomegaly . Evidence of prior sternotomy is noted . Moderate aortic calcification is present . No pulmonary edema , pleural effusion or pneumothorax is seen . Subtle opacity overlying the right lung base seen in the frontal view without a corresponding abnormality in the lateral view , likely represents the nipple shadow .
    OUTPUT:
    
Mild stable cardiomegaly , no acute cardiopulmonary pathology .