Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The exam has been compared to ___ because of similar technique . There is no surgical change in this patient with prior right lower lobe and left upper lobe lobectomy . The right hilum density with prior CyberKnife treatment is unchanged . The left lung is unremarkable . Mediastinal and cardiac contour is unchanged .
    OUTPUT:
    
There is no significant change since ___ .