Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval removal of the left pigtail catheter and placement of two left - sided chest tubes . Overall , aeration of the left lung base appears slightly improved as compared to recent prior examination , though there is still persistent left basilar consolidation and effusion . No post-procedural pneumothorax is identified . Stable increased density of the right lung base is likely a combination of atelectasis and a small effusion . There is no new pulmonary edema . Visualized mediastinal and hilar contours are within normal limits . Evaluation of the cardiac silhouette is limited on this examination secondary to bibasilar opacities .
    OUTPUT:
    
1 . Interval placement of two new chest drains . No post-procedural pneumothorax . 2 . Slightly improved aeration of the left lung base , though bibasilar opacities persist .