Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . Patchy calcifications are noted along the aorta . The lungs appear clear . There are no pleural effusions or pneumothorax . The bones are probably demineralized . Slight degenerative changes are similar along the thoracic spine .
    OUTPUT:
    
No evidence of acute disease .