Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable semi-upright view of the chest . Right central venous line ends at the superior cavoatrial junction . The heart size is mildly enlarged . There are aortic knob calcifications . There is no focal consolidation concerning for pneumonia . No pleural effusion or pneumothorax . Tortuous aorta .
    OUTPUT:
    
Right central venous line ends at or just below the superior cavoatrial junction .