Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright chest radiograph demonstrates a right central catheter , its tip which terminates at or just below the cavoatrial junction . Lungs are clear bilaterally . Cardiomediastinal and hilar contours are stable . There is no pneumothorax , pleural effusion , or evidence of pulmonary edema .
    OUTPUT:
    
Right central catheter its tip at or just below the superior cavoatrial junction .