Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are very low . The cardiac , mediastinal and hilar contours appear unchanged . The lungs remain clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of acute disease . If better evaluation of the lung bases is needed clinically , then repeat views with better inspiratory volume could be considered if needed .