Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . The heart is top normal in size and the aorta is unfolded . There is no focal consolidation , effusion , or pneumothorax . The hyperexpanded appearance of the lungs is compatible with underlying known emphysema . Bony structures are intact . Anterior spurring in the mid thoracic spine noted .
    OUTPUT:
    
Emphysema without superimposed pneumonia .