Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is an unchanged left IJ HD catheter with tip in the lower SVC . Heart size is normal . The aorta is calcified , indicating atherosclerosis . The mediastinal and hilar contours are unchanged . The pulmonary vasculature is normal . Bibasilar , left greater than right , atelectasis . Lungs are otherwise clear . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities . There are degenerative changes of the visualized spine .
    OUTPUT:
    
Bibasilar , left greater than right , atelectasis .