Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . There is similar mild relative elevation of the right hemidiaphragm . There is no pleural effusion or pneumothorax . Streaky opacity in the left lower lung is most consistent with minor atelectasis . Otherwise the lungs appear clear .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .