Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were reviewed and compared to the prior study . The right - sided line has been removed . The distribution of a small right pleural effusion has changed ; however , the amount of pleural fluid is relatively similar . There has been a slight interval increase in the small left pleural effusion and an increase in moderate bibasilar atelectasis . There is vascular prominence and vascular venous engorgement . Normal cardiomediastinal contours .
    OUTPUT:
    
1 . Increased moderate bibasilar atelectasis is most likely due to atelecasis but underlying pneumonia is possible . 2 . Slight increase in small left pleural effusion . Unchanged small right pleural effusion . 3 . Increased vascular prominence and venous engorgement indicate increased circulating blood volume .