Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is near complete opacification of the left hemi thorax with mediastinal shift to the left and left effusion that is layering posteriorly . This combination of findings is compatible with severe volume loss in association with effusion on the left . There patchy areas of atelectasis on the right
    OUTPUT:
    
Marked worsening of the left lung . Aeration due to a combination of volume loss and effusion