Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . Opacity along the left cardiac apex is consistent with waxing and waning minor atelectasis associated with a small epicardial fat pad . Otherwise , the lungs appear clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .