The IABP can be visualized in this radiograph below.
Look for the gas density (= black) in the CXR in the form of a balloon (aligned vertically ) in the descending Ao.
In a CXR, patent alveoli = black ; atelectasis = white.
Other gas filled structures will also appear black :
> stomach, esophagus, ETT cuff.
> IABP (during inflation >> with Helium).
pictured above, radio-opaque marker at the tip of the IAB.
Ideal position : 2cm below the top of the Aortic arch.