Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart appears mildly enlarged . Aortic calcification is moderately extensive . The cardiac , mediastinal and hilar contours are probably unchanged , allowing for differences in technique . The lungs appear clear . There are no pleural effusions or pneumothorax . Mild rightward convex curvature is again centered along the mid thoracic spine . There is also incompletely characterized cervical fusion .
    OUTPUT:
    
Mild cardiomegaly . No evidence of acute cardiopulmonary disease .