Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are again noted . Bilateral parenchymal opacities are again seen although greater on the left than on the right , they have slightly progressed on the right when compared to prior . Despite low lung volumes , there is also apparent progression based on the lateral view . Cardiomediastinal silhouette is unchanged . Osseous structures demonstrate no acute abnormality , chronic appearing right lateral rib fractures .
    OUTPUT:
    
Diffuse bilateral parenchymal opacities which compared to prior may have progressed . While infection with multifocal or atypical pneumonia is possible , differential is broad and also includes edema or other interstitial process . If findings do not clear on followup after treatment , CT scan will be necessary to further assess .