Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to the prior examination , there has been no relevant interval change . There is persistent hypoventilation and redistribution of the pulmonary vasculature , consistent with known severe emphysematous changes . There is no focal consolidation , pleural effusion , pneumothorax , or overt pulmonary identified . Mild to moderate cardiomegaly is stable .
    OUTPUT:
    
Severe emphysema and cardiomegaly , unchanged . No evidence of acute cardiopulmonary process .