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 left hemidiaphragm . Streaky left basilar opacities suggest unchanged minor atelectasis or scarring . The lungs appear otherwise clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .