Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are normal . There are low lung volumes which causes crowding of the bronchovascular structures . No pulmonary edema is seen . There are minimal patchy opacities in the lung bases . This likely reflects atelectasis . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes with probable bibasilar atelectasis . No pulmonary edema or pleural effusion .