Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . A dual lumen right - sided central venous catheter is seen terminating in the right atrium . Since the prior study , there has been interval development of a small - to - moderate right pleural effusion with overlying atelectasis . The left lung is clear . No pneumothorax is seen . Cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Interval development of small - to - moderate right pleural effusion with overlying atelectasis .