Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a normal cardiomediastinal silhouette and well - aerated lungs which are clear . There is no pleural effusion or pneumothorax . Multilevel degenerative disease of the thoracic spine is noted .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Multilevel degenerative changes of the thoracic spine .