Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a persistent linear opacity at the right lung base which is most suggestive of atelectasis . There is also atelectasis at the left lung base . Lung volumes are decreased . The lungs are clear of confluent consolidation or pulmonary vascular congestion . There no pneumothorax or pleural effusion . The cardiomediastinal silhouette is within normal limits . Stents are identified in the upper abdomen as on prior exam .
    OUTPUT:
    
Bibasilar atelectasis with decreased lung volumes . No focal consolidation or pulmonary vascular congestion .