Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are obtained . The previously demonstrated bilateral bullae and changes consistent with severe emphysema are redemonstrated . There is no focal consolidation , pneumothorax or pleural effusion . There are increased interstitial markings , which could be a component of volume overload . The cardiomediastinal silhouette is unchanged since the prior study .
    OUTPUT:
    
No evidence of focal pneumonia . Prominent interstitial markings could represent a component of volume overload in the setting of preexisting emphysema .