Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is increased opacity at the right lung base progressed since previous exams . There is also progression of volume loss in the right hemi thorax with right lateral deviation of the trachea . Left lung remains grossly clear . Prior left lateral rib fractures there noted .
    OUTPUT:
    
Progression of right basilar opacity with associated volume loss . This is likely due to underlying known effusion and component of atelectasis especially in setting of volume loss . Superimposed infection would also be possible . No other change .