Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . Post-operative changes of right - sided pneumonectomy are again seen with complete opacification of the right hemithorax with associated volume loss and surgical clips and changes to the bones . The left lung is clear . No acute osseous abnormality is identified .
    OUTPUT:
    
Prior right pneumonectomy . No acute cardiopulmonary process .