Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . No focal consolidation , effusion , edema , or pneumothorax . The heart is top - normal in size . Mediastinum is not widened . The descending thoracic aorta is slightly tortuous , unchanged . These thoracic spine is mildly curved to the right . The lumbar spine is slightly curved to the left . Multilevel degenerative changes are identified within the thoracic spine including anterior osteophytes and loss of intervertebral disc height . Mild retrolisthesis of vertebral bodies in the lower thoracic and upper lumbar spine appear similar to the scout image on the chest CT from ___ .
    OUTPUT:
    
1 . No focal pneumonia . 2 . Top - normal heart size . 3 . Multilevel degenerative changes .