Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right basilar pigtail catheter is new in the interval . Moderate size partially loculated right empyema appears decreased in size compared to the previous radiograph with increased air noted in the pleural space . There is minimally improved aeration in the right lung base compared to the previous radiograph with continued atelectasis noted . Rightward shift of mediastinal structures is re- demonstrated . Cardiac and mediastinal contours are otherwise unchanged with the heart size within normal limits . The left lung is grossly clear . No left - sided pneumothorax is identified .
    OUTPUT:
    
Interval placement of right basilar pigtail chest tube . Partially loculated moderate size right empyema appears slightly decreased in size compared to the previous radiograph with persistent right basilar patchy opacity likely reflective of atelectasis .