Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes remain low with bibasilar linear atelectasis . There is no pneumothorax or large pleural effusion . The heart is not enlarged . The mediastinal and hilar contours are stable in appearance .
    OUTPUT:
    
No significant change since the study of ___ with persistent low lung volumes and bibasilar atelectasis .