Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph from ___ , diffuse interstitial lung disease with associated low lung volumes appear similar and essentially unchanged . Tracheostomy tube is in unchanged position . A left PICC line terminates in the upper - to - mid SVC , unchanged in position . There is no superimposed acute process .
    OUTPUT:
    
Unchanged diffuse interstitial lung disease with no evidence of a superimposed acute process .