Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable supine chest radiograph was obtained . The lungs are somewhat low in volume with unchanged retrocardiac atelectasis . Right internal jugular central venous catheter terminates at the level of the superior cavoatrial junction . There is no pleural effusion . Assessment for pneumothorax limited on the supine view without evidence of large pneumothorax . The cardiac size and cardiomediastinal contours are unremarkable .
    OUTPUT:
    
Satisfactory position of right internal jugular catheter .