Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the chest radiograph obtained 13 days prior , overall greatly improved . Lung volumes remain low with some mild bibasilar and mid right lung atelectasis . No focal consolidations or pleural effusions . No pneumothorax . A right - sided port terminates at the expected location of the superior cavoatrial junction . Mild cardiomegaly and cardiomediastinal silhouette are unchanged .
    OUTPUT:
    
Mild atelectasis , but no radiographic evidence of pneumonia .