Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Post pneumonectomy appearance of the right hemi thorax is stable compared to the prior radiograph . Left lung remains hyperexpanded but grossly clear , and there is no evidence of left pleural effusion . Cardiomediastinal contours remain shifted to the right and are unchanged in appearance . .
    OUTPUT:
    
No acute cardiopulmonary abnormality .