Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is normal . Mediastinal and hilar contours are unchanged and within normal limits . The pulmonary vasculature is normal . Minimal fluid is demonstrated within the minor fissure . There are minimal atelectatic changes in the lung bases . No pleural effusion or pneumothorax is demonstrated . There are no acute osseous abnormalities . Multilevel degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary process . Low lung volumes .