Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the most recent chest radiograph , there has been removal of the right - sided central venous catheter , and lung volumes are reduced . Mild bibasilar atelectasis versus aspiration in the left infrahilar region . Cardiomediastinal contours are normal . No pleural effusion or pneumothorax .
    OUTPUT:
    
Mild bibasilar atelectasis . Left infrahilar opacity may also represent aspiration .