Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Streaky density bilaterally most consistent with fibrotic change is again demonstrated . Prominence of the interstitium has improved since the more recent examination . The lungs are otherwise clear . Hilar fullness and prominence of the paratracheal soft tissues persists . The aorta is tortuous and calcified . The heart is normal in size . There are degenerative changes in the spine .
    OUTPUT:
    
Persistent hilar is fullness and prominence of the paratracheal soft tissues . Increased interstitial markings have improved .