Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest show a right subclavian central venous catheter with the tip terminating in the high right atrium . This is unchanged since ___ . Otherwise , the lung volumes have improved since the prior study and the lungs are clear . The cardiac and mediastinal contours are normal . No pleural abnormality is detected .
    OUTPUT:
    
Tip of the Hickman catheter is in the high right atrium , 2 .5 cm below the cavoatrial junction . If the patient continues to be symptomatic , and the catheter can be pulled back , it should be pulled back by 2 .5 cm for placement in the low SVC . These findings were relayed to Dr . ___ , by Dr . ___ , as requested .