Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: ET tube , left subclavian central line and NG tube remain in unchanged satisfactory position . Compared with most recent prior radiograph , there are lower lung volumes and as a consequence , a general increase in lung density . In addition , a new consolidation seen in the left lung base is likely atelectasis . Heart size is unchanged . The mediastinal contours are stable . Small bilateral pleural effusions are unchanged . No pneumothorax .
    OUTPUT:
    
New consolidation at the left base , likely atelectasis ; otherwise , no significant change from ___ .