Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been an interval decrease of the left - sided pleural effusion without evidence of pneumothorax . There is associated atelectasis . A small amount of pleural effusion still remains . There is continued opacification of the right hemithorax as described before .
    OUTPUT:
    
Interval decrease in left pleural effusion with associated atelectasis and no pneumothorax .