Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The tip of the intra-aortic balloon pump is low lying and situated 5 .8 cm below the aortic knob . The ET tube remains in appropriate position with the tip terminating 4 .1 cm above the carina . Remaining lines and tubes are in unchanged positions . There is mild bilateral pulmonary vascular congestion . The cardiomediastinal silhouette is unchanged . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
1 . Low - lying intra aortic balloon pump with tip situated 5 .8 cm below the aortic knob . 2 . Mild central vascular congestion .