Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is mildly enlarged but unchanged . The aorta is tortuous and diffusely calcified . Mediastinal and hilar contours are within normal limits otherwise . Pulmonary vascularity is not engorged . Left basilar linear and streaky opacity likely reflects atelectasis . No focal consolidation , pleural effusion or pneumothorax is present . No acute osseous abnormalities are seen . There is diffuse demineralization of the osseous structures with multilevel degenerative changes in the thoracic spine .
    OUTPUT:
    
Mild left basilar atelectasis . Otherwise no acute cardiopulmonary abnormality .