Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . The right lung is unremarkable . The left lung demonstrates a peripheral opacity in the mid lung field which is improved compared with prior exam . Two chest tubes are noted in unchanged position ending in expected position in the opacified area as demonstrated in the lateral radiograph . No new air - fluid level denoting reaccumulation is present . Again noted is a small left - sided pleural effusion with concurrent atelectasis . The cardiomediastinal and hilar contours are unremarkable . A PICC line ends in the lower SVC , unchanged from prior .
    OUTPUT:
    
Interval improvement of left lung opacity consistent with known empyema . No evidence of fluid reaccumulation . Supporting devices are in expected position .