Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The intra-aortic balloon pump tip is less than 1 cm from the apex of the aortic knob . The right ___ catheter projects over the descending right pulmonary artery and should not be advanced further . Mild cardiomegaly is stable , with improvement in the right lower lobe edema . No new focal consolidation concerning for pneumonia or pneumothorax . Intact median sternotomy wires and mediastinal clips are unchanged . Left pacemaker continuous leads terminate in the right ventricle and right atrium , unchanged .
    OUTPUT:
    
1 . The intra-aortic balloon pump tip terminates less than 1 cm from the aortic knob apex . No pneumothorax . 2 . Interval improvement in the degree of right lower lobe pulmonary edema .