Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette is similar to prior , possibly minimally larger . . Presumed aortic balloon pump . This probably lies slightly higher than on the prior study , nowat the level of the inferior aortic knob lumen . Again seen is upper zone redistribution and diffuse vascular blurring , compatible with CHF , slightly more pronounced , with atelectasis in the right cardiophrenic and retrocardiac regions . Findings in the right cardiophrenic region are more pronounced . No gross effusion . No pneumothorax detected .
    OUTPUT:
    
Cardiac silhouette is similar , possibly slightly larger . CHF findings are slightly worse . Aortic balloon pump lies at level of the lower aortic knob lumen . Clinical correlation regarding retraction by approximately 1 cm is requested . Bibasilar atelectasis , slightly worse in the right cardiophrenic region compared with 1 day earlier . In the appropriate clinical setting , a pneumonic infiltrate would be difficult to exclude .