Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size , mediastinal , and hilar contours are normal . The lungs are well expanded and clear without pleural effusion or pneumothorax . The right hemi-thorax does demonstrate a smaller volume , with a mildly elevated right hemidiaphragm , consistent with the history of right middle lobe lobectomy .
    OUTPUT:
    
No acute cardiopulmonary process or interval change .