Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . There is no pleural effusion or pneumothorax . The lungs appear clear . Nipple shadows are again visible bilaterally . Incidental note is made of an azygos fissure , which is a common normal variant .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .