Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided Port - A - Cath tip terminates in the right atrium . Heart size is mildly enlarged but unchanged . The aorta remains mildly tortuous . Mediastinal hilar contours are similar . The pulmonary vasculature is not engorged . Patchy ill - defined opacities are noted in both lung bases which may reflect atelectasis though infection or aspiration can not be excluded . There is no pleural effusion or pneumothorax . The biliary stent catheter is seen within the right upper quadrant of the abdomen .
    OUTPUT:
    
Bibasilar airspace opacities may reflect atelectasis , but infection or aspiration can not be excluded .