Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The heart size is normal . Mediastinal and hilar contours are unremarkable . The pulmonary vasculature is normal . Apart from minimal atelectasis in the lung bases , the lungs are clear without focal consolidation . No pleural effusion or pneumothorax is identified . No acute osseous abnormalities detected .
    OUTPUT:
    
Mild bibasilar atelectasis in the setting of low lung volumes