Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left subclavian PICC line is present , tip over distal SVC , similar to the prior film . No pneumothorax is detected . The cardiomediastinal silhouette is not significantly changed . Patchy opacity at the right base is considerably improved compared with the prior film , though slight residual opacity is present . Minimal hazy opacity at the left base is similar to the prior film . This could reflect mild atelectasis , scarring , or possibly a site of prior aspiration . No new focal infiltrate is identified to suggest a new site of pneumonia or pneumonitis . No CHF and no gross effusion identified .
    OUTPUT:
    
Bibasilar opacities , considerably improved on the right and probably unchanged on the left . No new focal opacity identified .