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 . There is no pleural effusion or pneumothorax . The lungs appear clear . Mild right lateral pleural thickening is probably post-traumatic noting poorly characterized old overlying rib fractures .
    OUTPUT:
    
No evidence of acute disease .