Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A new left internal jugular central venous catheter terminates in the mid superior vena cava . The patient remains intubated with an orogastric tube that courses into the stomach . The patient is status post coronary bypass graft surgery . The cardiac , mediastinal and hilar contours appear unchanged . Since the prior study , opacification of the left lung base has increased but appears similar to slightly decreased at the right lung base . This appearance suggests atelectasis and possibly an increasing pleural effusion . There is no pneumothorax .
    OUTPUT:
    
New central line terminating in the superior vena cava ; no pneumothorax . Increased opacification of the left lung base .