Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been no appreciable change in a known mild right pleural effusion after thoracentesis . No large post - procedural pneumothorax is evident . A tiny bit of air is likely within the pleural space due to recent instrumentation and fluid - level seen on the lateral view . Atelectasis overlying a chronically elevated right hemidiaphragm is unchanged . The right upper lung and left lung remain clear . Upper mediastinal contours are within normal limits . The heart size is unchanged and is within normal limits .
    OUTPUT:
    
Interval thoracentesis on the right without significant change in moderate right pleural effusion . No large post - procedural pneumothorax .