Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is at the upper limits of normal . The mediastinal contours demonstrate a mildly tortuous aorta but no evidence of aneurysmal dilatation . The lungs are clear without evidence of lobar consolidation or appreciable pulmonary edema . There is no pleural effusion or pneumothorax . Expected degenerative changes are seen throughout the thoracolumbar spine .
    OUTPUT:
    
No acute cardiopulmonary process .