Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Postoperative changes of right upper lobectomy are seen with volume loss in the right hemithorax . Hydropneumothorax is again seen with fluid level rising , an expected postoperative evolution . The left lung and remaining right lung are clear . The cardiomediastinal silhouette is stable . No acute osseous abnormalities identified .
    OUTPUT:
    
Expected evolution of postoperative changes of a right upper lobectomy without acute superimposed cardiopulmonary process .