Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph ___ at 18 : 57 is submitted .
    OUTPUT:
    
Interval decrease in size of layering left effusion status post thoracentesis with no evidence of pneumothorax . Right Port - A - Cath unchanged in position . Overall cardiac and mediastinal contours are stable . Persistent faint bibasilar opacities likely reflect patchy atelectasis in the setting of small effusions . Left upper lobe opacity is unchanged and consistent with radiation change when correlated with recent chest CT and the patient 's clinical history . No pulmonary edema .