Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph obtained . There is interval development of mild interstitial edema . There is slight asymmetric increase in opacity in the right upper lobe , which could represent a superimposed consolidation / pneumonia . Mediastinal prominence could be due to portable AP technique . Bony structures are intact . Heart size appears grossly within normal limits . No large effusion is seen .
    OUTPUT:
    
Interstitial edema with possible superimposed pneumonia in the right upper lobe . Please note evaluation limited given portable AP technique .