Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright chest radiograph ___ at 15 :49 is submitted .
    OUTPUT:
    
Right subclavian PICC line unchanged in position . Overall cardiac and mediastinal contours are stably enlarged given differences in patient positioning . Minimal patchy opacities at both lung bases likely reflect patchy atelectasis . No pulmonary edema . No pneumothorax . If parenchymal lung disease remains of clinical concern , further imaging with CT could be performed .