Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been slight interval improvement of a right - sided small pleural effusion with slight interval improved aeration of the right lung , although adjacent atelectasis persists . The left lung is overall clear without evidence of a pleural effusion . The cardiomediastinal contours are stable . A right - sided chest tube appears to terminate in the right lung base . No evidence of pneumothorax . The visualized osseous structures are unremarkable .
    OUTPUT:
    
Interval improvement of a small right - sided pleural effusion with improved aeration , and persistent adjacent atelectasis .