Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to ___ chest radiograph , overall appearance of the chest is unchanged , with no findings to account for the history of chest pain . Vascular stent remains in place in the superior vena cava as well as a right sided vascular catheter with tip in the proximal right atrium . Lungs and pleural surfaces are clear .
    OUTPUT:
    
No pulmonary edema or acute pneumonia .