Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The intra-aortic balloon pump appears unchanged in position with the tip approximately at the level of the aortic arch . Lung volumes are unchanged . No liver consolidation or pneumothorax seen . No definite pleural effusion seen . Pulmonary vascular congestion is seen is a mildly improved compared to the prior study .
    OUTPUT:
    
Essentially unchanged appearances when compared to the prior study , the IABP terminates at approximately the level of the aortic arch .