Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: 2 chest tubes are positioned on the left lung , one with tip ending superiorly and anteriorly to the apex , the second with tip ending posteriorly and inferiorly to the base of the left lung . There are no signs of pneumothorax . Left pigtail was removed . There pleural fluid on the left base is mildly improved , with evidence of improved lung ventilation . There is an increased opacity of the contralateral lung base that can be due to mild pleural effusion or dependant atelectasis .
    OUTPUT:
    
No sign of pneumothorax after positioning of 2 chest tubes on the left lung . the pleural fluid on the left base is mildly improved , new pleural opacity on the right lung base .