Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright chest film ___ at 07 :34 is submitted .
    OUTPUT:
    
The intra-aortic balloon pump remains in place with its tip 4 cm below the top of the aortic knob . Overall cardiac and mediastinal contours are unchanged . Lungs appear well inflated without evidence of focal airspace consolidation , pulmonary edema , pleural effusions or pneumothorax .