Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right - sided Port - A - Cath is seen and terminates in the distal SVC as before . Lung volumes are somewhat low . The heart is normal in size . There it is some bronchovascular crowding , likely related to low lung volumes . There are likely trace bilateral pleural effusions . Note is made of a retrocardiac opacity , new from the prior exam . No large free air is seen on this semi-erect view . A biliary stent projects in the upper abdomen . There is sclerosis involving a right sided rib and multiple thoracic vertebral bodies .
    OUTPUT:
    
No large free air seen on this semi-erect view . If there is high clinical suspicion for pneumoperitoneum , CT scan should be considered . Trace bilateral pleural effusions . Retrocardiac opacity could represent atelectasis or infection . A lateral view may be helpful with full inspiration .