Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded and clear . There is mild cardiomegaly . The hilar contours and pleural surfaces are normal . Elevation of the left hemidiaphragm is unchanged . There is no pleural effusion or pneumothorax . The aortic arch is calcified .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Mild cardiomegaly is unchanged .