Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear within normal limits . Blunting of the left costophrenic angle suggests the possibility of very small effusion . There is no pleural effusion on the right . The lungs appear clear . Several old right - sided rib fractures appear unchanged . Mild degenerative changes are similar along mid to lower thoracic levels . A lower thoracic interspace shows new moderate narrowing over the long interval suggesting degenerative change . The vertebral body heights appear preserved .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease . Moderate degenerative change along the lower thoracic spine .