Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate hyperexpansion of the lungs and relative flattening of the hemidiaphragms , consistent with emphysema . There is persistent eventration of the right hemidiaphram or diaphragmatic hernia , unchanged since the prior study . There is no evidence of pleural effusion , pulmonary edema or focal opacity . The cardiomediastinal silhouette is stable in appearance .
    OUTPUT:
    
No acute cardiopulmonary process .