Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are unremarkable . Heart size is normal . Pulmonary vasculature is normal . Lungs are clear without focal consolidation . No pleural effusion or pneumothorax is present . Multilevel degenerative changes are noted in the thoracic spine . There is diffuse demineralization of the osseous structures . No acute osseous abnormality is clearly noted .
    OUTPUT:
    
No acute cardiopulmonary abnormality .