Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta remains tortuous . The mediastinal and hilar contours are otherwise within normal limits . Pulmonary vasculature is normal . Lungs are clear . No focal consolidation , pleural effusion or pneumothorax is present . Mild degenerative changes are seen in the thoracic spine . A fiducial marker again projects over the midline T7 - T8 intervertebral disc space .
    OUTPUT:
    
No acute cardiopulmonary abnormality .