Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright chest radiograph ___ at 04 :51 is submitted .
    OUTPUT:
    
The pericardial drain and left pleural pigtail basilar catheter are unchanged in position . There continues to be improving aeration in the left mid and lower lung as well as at the right base suggestive of resolving atelectasis . No pneumothorax is appreciated . Cardiac and mediastinal contours are likely within normal limits given portable technique . No pulmonary edema .