Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . The cardiac , mediastinal and hilar contours appear stable . Nipple shadows are visible bilaterally . Opacity projecting over posterior lower lungs on the lateral view is probably due to stable atelectasis in the medial right lower lobe , as seen previously . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of acute disease .