Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post partial right pneumonectomy and radiation therapy . A pigtail catheter within the right costophrenic angle is unchanged in position . A moderate right effusion with presumed underlying atelectasis is unchanged in severity . The left lung remains clear . There is no pneumothorax . Cardiomediastinal and hilar contours are within normal limits .
    OUTPUT:
    
No change in severity of moderate right effusion and probable atelectasis . No change from most recent prior .