Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . The cardiac , mediastinal and hilar contours appear within normal limits . There is no pleural effusion or pneumothorax . Aside from minimal posterior opacification suggesting minor atelectasis , the lungs appear clear . Mild degenerative changes are noted along the lower thoracic spine . Prominent facet hypertrophy is noted along the right side at the C4 - C5 interspace of the cervical spine .
    OUTPUT:
    
No evidence of acute disease .