Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate clear lungs with no focal consolidation . There is no pleural effusion . Heart size is top - normal . The descending aorta is mildly tortuous unchanged in appearance . Mediastinal and hilar contours are unremarkable . Moderate degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .