Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mild to moderately enlarged . The cardiac , mediastinal and hilar contours appear unchanged allowing for differences in technique , noting that this is a lordotic perspective . The lungs appear clear . There is no pleural effusion or pneumothorax . Bony structures appear within normal limits .
    OUTPUT:
    
Similar cardiomegaly . No evidence of acute cardiopulmonary process .