Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The frontal chest radiograph again demonstrates a normal cardiomediastinal silhouette . There is mild bibasilar atelectasis . No focal consolidation , pleural effusion , or pneumothorax is seen . Linear markings seen previously are no longer visualized , and likely represented overlying hair or fabric rather than pneumomediastinum . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
Mild bibasilar atelectasis . Otherwise normal chest radiograph , without evidence of pneumomediastinum .