Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph ___ at at 18 : 13 is submitted .
    OUTPUT:
    
Right basilar pleural catheter remains in place . Patchy opacities at both bases likely reflect atelectasis , although pneumonia can not be entirely excluded . No pneumothorax is seen . A linear opacity at the right apex is felt to be related to something external to the patient as it crosses outside of the hemithorax . Overall cardiac and mediastinal contours are stable . No pulmonary edema . Crowding of the vasculature in the setting of low lung volumes .