Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Central venous catheters have been removed . The heart is normal in size . The aortic arch is partly calcified . The mediastinal and hilar contours appear unchanged . The lungs appear clear . There are no definite pleural effusions or pneumothorax . The bones are probably demineralized to some degree . Slight degenerative changes appear similar along the thoracic spine .
    OUTPUT:
    
No evidence of acute disease .