Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Compared to prior study from 5 days ago , there is significant decrease in the left pleural effusion . There is a small right pleural effusion . There is no pulmonary edema . Heart is mildly enlarged . Left - sided chest tube is in unchanged position .
    OUTPUT:
    
Significant improvement in left pleural effusion .