Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph from ___ , there has been interval increase of the extent and severity of right lower lobe heterogeneous opacities now occupying the right upper lobe . This could be representative of unilateral edema or worsening pneumonia . Left lung is unchanged . Cardiac and mediastinal contours are unchanged .
    OUTPUT:
    
Interval increase of extent and severity of right - sided opacities , which could represent either unilateral edema or worsening pneumonia .