Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . The aorta is tortuous . Hilar contours are normal , and the pulmonary vasculature is normal . Linear opacities within the lower lobes bilaterally likely reflect areas of subsegmental atelectasis . No focal consolidation , pleural effusion or pneumothorax is identified . There are multilevel moderate degenerative changes noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .