Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Left - sided dual - chamber pacemaker device is noted with leads terminating in the right atrium and right ventricle . Heart size remains mildly enlarged . Aortic knob calcifications are again noted . The aorta is somewhat unfolded . Pulmonary vascularity is normal , and the hilar contours are unremarkable . Minimal patchy bibasilar atelectasis is noted . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes with minimal bibasilar atelectasis .