Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Extremely low lung volumes without definite consolidation . Heart size is likely normal , allowing for low lung volumes . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities . There are multilevel degenerative changes of the visualized thoracolumbar spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .