Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiograph demonstrates unremarkable cardiomediastinal and hilar contours . On a background of interstitial edema , there are dense opacifications noted in the left lower lobe as well as within the lingula . No opacification is noted in the right lung . No pleural effusion or pneumothorax present .
    OUTPUT:
    
Left lower lobe and lingular pneumonia with background interstitial edema .