Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left lung base pigtail is unchanged . There is no evidence of pneumothorax . Lung volume is still low for bibasilar atelectasis , larger to the left . Heart size is unchanged and still moderately enlarged . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
Reduced lung volumes for bibasilar atelectasis , larger to the left base . No pneumothorax or pleural effusion .