Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate postsurgical changes in the right lower lobe with opacification at the right base proven to represent effusion in the resection cavity on the CT with elevation of the right hemidiaphragm . The left lung is clear . No left pleural effusion . No pneumothorax . Normal heart size . Stable mediastinal and hilar contours . The overall appearance of the chest is not significantly changed from ___ .
    OUTPUT:
    
Stable postoperative appearance of right lower lobectomy . No significant change from prior .