Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild emphysema involving the biapical lung is unchanged . Linear bibasilar atelectasis is present . The cardiomediastinal and hilar silhouette is normal . No evidence of pneumothorax , pleural effusion , or focal consolidation .
    OUTPUT:
    
1 . No focal consolidation , pneumothorax , or pleural effusion . 2 . Bibasilar atelectasis .