Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low but slightly better than the previous exam . Pleural effusion is minimal if any . The mediastinal and cardiac contours are normal . Right - sided Port - A - Cath ends in cavoatrial junction . There is no pneumothorax .
    OUTPUT:
    
Except for slightly improved bibasilar atelectasis the rest of the exam is unchanged .