Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes . The heart size is normal . The mediastinal and hilar contours are unremarkable , without evidence of mediastinal widening . Mild atelectasis is demonstrated within the lung bases . No focal consolidation , pleural effusion or pneumothorax is otherwise identified . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes with mild bibasilar atelectasis .