Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left subclavian dialysis catheter remains in place , with tip terminating within the lower right atrium . A vascular stent also remains in place in the left brachiocephalic vein and proximal superior vena cava . Heart size is normal . Widening of azygos contour is unchanged since prior chest radiograph . Lungs and pleural surfaces are clear . Lung volumes are relatively low .
    OUTPUT:
    
No acute cardiopulmonary radiographic abnormality .