Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior examination , there has been interval filling of the residual apical cavity with fluid and no evidence of residual pneumothorax . There are changes related to right upper lobectomy with volume loss and diaphragmatic elevation . The remainder of the right hemithorax is well aerated . The left hemithorax is well aerated . There are no focal opacities concerning for pneumonia . There are no pleural effusions or pneumothorax . The cardiomediastinal and hilar contours are normal . Pulmonary vascularity is normal .
    OUTPUT:
    
Expected changes status post right upper lobectomy with fluid demonstrated within the lobectomy site . No evidence of pneumothorax or acute cardiopulmonary process .