Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Double AP upright chest radiograph ___ at 12 :04 is submitted .
    OUTPUT:
    
Interval decrease in size of right pleural effusion status post thoracentesis . No pneumothorax is seen . There is a persistent small left pleural effusion with adjacent opacity suggestive of atelectasis , although pneumonia can not be entirely excluded . No pulmonary edema . Stable cardiac and mediastinal contours .