Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . Bilateral upper lobe scarring is seen with superior retraction of the hila . The lung volumes are relatively low . There is no evidence of superimposed acute process . Cardiomediastinal silhouette is stable . Surgical clips in the upper abdomen again noted . Osseous structures are essentially unremarkable noting probable right glenoid orthopedic hardware .
    OUTPUT:
    
Bilateral upper lobe scarring unchanged without evidence of superimposed acute process .