Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The moderate - sized pneumothorax present on the prior chest x-ray has resolved and the left lung appears expanded . Some residual atelectasis is still present . The right lung appears clear and no evidence of pneumonia or failure is seen . The position of the various support lines and tubes is unchanged .
    OUTPUT:
    
Reexpansion of left lung .