Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are slightly hyperexpanded and the hemidiaphragms are flattened . Heart size is decreased since the prior study , now normal . The vasculature is also less engorged . The mediastinal and hilar contours are normal . There is no pleural effusion or pneumothorax . There is no pulmonary edema .
    OUTPUT:
    
Heart size is smaller , now normal . There is evidence of COPD .