Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes remain persistently low postoperatively with associated prominent bibasilar atelectasis . The patient is status post CABG with median sternotomy wires in place and mediastinum does not appear widened . Cardiac silhouette is difficult to evaluate due to obfuscation by low lung volumes and atelectasis . There has been interval removal of a left - sided chest tube without evidence of pneumothorax . There is no large pleural effusion . A right internal jugular central venous catheter remains at the level of the upper - to - mid SVC .
    OUTPUT:
    
1 . Removal of left - sided chest tube without pneumothorax . 2 . Persistent low lung volumes with associated significant bibasilar atelectasis .