Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . Lungs appear clear bilaterally without focal consolidation , effusion , or pneumothorax . There is upper lobe lucency and suggestion of underlying emphysema which was previously detected on CT chest from ___ . Cardiomediastinal silhouette is stable . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Emphysema without superimposed pneumonia or pneumothorax .