Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right IJ central venous catheter terminates in the low SVC . A nasogastric tube enters the stomach , tip not visualized . Multifocal airspace opacities , particularly in the perihilar locations and left lower lobe are most likely due to pulmonary edema . The opacity at the left lung base may be due to atelectasis , aspiration or pneumonia . There is no pneumothorax .
    OUTPUT:
    
No appreciable change in pulmonary edema or infection . Persistent left lower lobe retrocardiac opacification may due to atelectasis , aspiration or pneumonia .