Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is normal . Mediastinal and hilar contours are normal . Pulmonary vasculature is normal . Apart from mild atelectasis at the lung bases , the lungs are clear without focal consolidation . No pleural effusion or pneumothorax is present . No acute osseous abnormalities detected .
    OUTPUT:
    
Low lung volumes with mild bibasilar atelectasis .