Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The mediastinal and hilar contours are normal . The previously seen right basilar ring shadow is not identified on today 's study . A small left effusion and left retrocardiac atelectasis have worsened . Bilateral lower lobe parenchymal opacities , slightly worse on the left , are concerning for pneumonia . There is no pneumothorax . The nasogastric tube is unchanged .
    OUTPUT:
    
Bilateral lower lobe consolidation consistent with pneumonia . The previously described right basilar ring shadow is not identified on today 's radiographs .