Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are diffuse lower lobe , peripherally predominant , ground - glass opacities which are not seen as well as on CT from prior day . There are no definitive focal areas of consolidation . No pneumothorax . The cardiomediastinal and hilar contours are within normal limits . The pleural surfaces are within normal limits . The osseous structures are intact .
    OUTPUT:
    
Diffuse ground - glass opacities consistent with patient 's history of GPA .