Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with chest radiograph on ___ , there continued low lung volumes , with bibasilar atelectasis , similar to prior . A small left apical pneumothorax is not significantly changed from prior . There is no new focal consolidation , pulmonary edema or pleural effusion . Bilateral pleural drains are present . Postoperative appearance of the cardiomediastinal silhouette is similar to prior . Median sternotomy wires are unchanged . A right IJ catheter terminates in the right atrium .
    OUTPUT:
    
1 . Small left apical pneumothorax is not significantly changed from prior . 2 . Bibasilar atelectasis . No pleural effusion .