Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated . There is diffuse interstitial thickening involving the bases bilaterally as well as the right upper and middle lobes , which has progressed significantly in comparison to the prior radiograph , and likely represents a multifocal pneumonia . Heart size is stable . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Diffuse interstitial thickening bilaterally , worse on the right , which has progressed compared to ___ , likely representing multifocal pneumonia .