Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since earlier same - day chest radiograph , mild right perihilar opacity is new , possibly from aspiration . Mild bibasilar and retrocardiac atelectasis is slightly improved . The heart size is unchanged . The tip of a right internal jugular venous central line is in the low SVC . No pneumothorax .
    OUTPUT:
    
1 . Mild right perihilar opacity is new since earlier same - day chest radiograph , possibly aspiration .