Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a normal cardiac silhouette size . Thoracic aorta is diffusely calcified and mildly tortuous . Mediastinal and hilar contours are unchanged . Lungs are clear without focal consolidation , pleural effusion , or pneumothorax . There are multilevel degenerative changes of the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary process .