Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Semi-upright portable radiograph of the chest demonstrates a left internal jugular central venous catheter , terminating in the upper SVC . A right dual - lumen hemodialysis catheter is unchanged , terminating at the cavoatrial junction . The lungs are well expanded and clear . There is no pleural effusion , pneumothorax or focal airspace opacity . The heart is mildly enlarged . Otherwise , the cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
Left internal jugular central venous line and right hemodialysis port in appropriate position , as described above . No evidence of complication . Mild cardiomegaly .