Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A tracheostomy appears unchanged . The cardiac , mediastinal and hilar contours are stable . There is no pleural effusion or pneumothorax . A large consolidation involves posterior portions of the right lower lobe , most suggestive of lobar pneumonia . Bony structures are unremarkable .
    OUTPUT:
    
Extensive right lower lobe opacity suggesting lobar pneumonia . However , follow - up radiographs are recommended within eight weeks in order to ensure resolution .