Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The mediastinal and hilar contours are unremarkable . Right lower lobe opacification is new compared to the prior exam and is concerning for pneumonia . Left lung is clear . No pleural effusion or pneumothorax is identified . There are multilevel degenerative changes in the thoracic spine .
    OUTPUT:
    
Right lower lobe pneumonia . Follow up radiographs after treatment are recommended to ensure resolution of this finding .