Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild hyperexpansion , similar to the prior study suggesting COPD . There is no focal consolidation , pleural effusion , pulmonary edema , or pneumothorax . The cardiomediastinal silhouette is stable with mild cardiomegaly and tortuous aorta .
    OUTPUT:
    
Mild hyperexpansion suggesting COPD . Otherwise no evidence of acute cardiopulmonary process .