Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . There is mild bibasilar atelectasis but no focal opacity to suggest pneumonia . Cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Mild bibasilar atelectasis . No evidence of acute cardiopulmonary process .