Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The intra-aortic balloon pump is approximately 4 .8 cm from the aortic apex . Low lung volumes . Lungs are clear . The cardiac silhouette is not enlarged . On folding of the descending thoracic aorta . No pneumothorax . Likely trace left effusion .
    OUTPUT:
    
IABP approximately 4 .8 cm aortic apex .