Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , with left lower lobe atelectasis . Superimposed infection can not be excluded however appearances are similar when compared to the prior studies . No other areas concerning for consolidation are identified . No pneumothorax seen . The cardiomediastinal contour is unchanged . No frank pulmonary edema .
    OUTPUT:
    
Low lung volumes with left lower lobe atelectasis , superimposed infection can not be excluded however appearances are unchanged when compared to the prior study .