Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Since a prior exam , patient has been extubated and there has been removal of the nasogastric tube . The right subclavian central venous catheter is seen with its tip in the mid SVC region . The lungs are clear though volumes are low . The heart is top - normal in size . The mediastinal contour is normal . No pneumothorax or effusion .
    OUTPUT:
    
Interval extubation and removal of NG tube . Right subclavian central venous catheter in unchanged and appropriate position . Mild cardiomegaly . No signs of pneumonia .