Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: All lines and tubes are unchanged compared to the prior examination . Bilateral diffuse patchy air space opacities are unchanged compared to the prior examination . Heart size is normal . The mediastinal and hilar contours are normal . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Essentially unchanged examination in comparison to the prior with appropriate positioning of all lines and tubes , and patchy diffuse airspace opacities bilaterally .