Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable semi upright view of the chest . Low lung volumes as well as poor patient positioning limits assessment . Coarsened interstitial lung markings reflect known interstitial lung disease . A superimposed edema is difficult to exclude . However , there is increased focal opacity in the right upper lobe which is concerning for a superimposed pneumonia . Overall cardiomediastinal silhouette appears grossly unchanged with the heart size is difficult to reliably assessed . Gas-filled bowel loops are seen below the right and left hemidiaphragm . Bony structures appear grossly intact .
    OUTPUT:
    
Diffuse interstitial opacity likely reflects known interstitial lung disease , difficult to exclude a superimposed edema . Focal right upper lobe opacities concerning for pneumonia .