Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . Streaky opacities within the lung bases are compatible with atelectatic changes . The heart size is normal . The mediastinal and hilar contours are unremarkable . The pulmonary vascularity is not engorged . No pleural effusion or pneumothorax is detected . There are no acute osseous abnormalities .
    OUTPUT:
    
Mild bibasilar atelectasis .