Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A dialysis catheter terminates in the right atrium . There is a vascular stent projecting over the left chest apex which probably corresponds to a left subclavian venous stent . The heart is again moderately enlarged . The lung volumes are low . There is no pleural effusion or pneumothorax . The lungs appear clear .
    OUTPUT:
    
No evidence of acute disease .