Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right PICC terminates at the cavoatrial junction , unchanged . The previously seen retrocardiac pneumonia appears improved , wall opacification of the right lung base is grossly unchanged , likely a combination of atelectasis due to low lung volumes and unchanged right basilar consolidation . The cardiomediastinal silhouette is stable .
    OUTPUT:
    
1 . Slight interval improvement in retrocardiac consolidation . 2 . Allowing for differences in lung volumes , unchanged right basilar opacification which may represent a combination of atelectasis and pneumonia .