Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A tracheostomy tube and right internal jugular central venous catheter are in unchanged position . Bibasilar atelectasis , slightly greater on the right than the left , is stable . There is no new opacity , pulmonary edema , pleural effusion or pneumothorax . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
No significant change in the bibasilar atelectasis .