Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Intra-aortic balloon pump projects 2 .2 cm below top of aortic arch . Pulmonary edema has decreased . Mildly prominent heart size , pulmonary vascularity , stable . More prominent retrocardiac opacity left base , likely atelectasis . Minimal right basilar atelectasis is seen .
    OUTPUT:
    
Improved pulmonary edema . More prominent retrocardiac opacity , likely atelectasis