Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are normal and unchanged . Lungs are clear and the pulmonary vasculature normal . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities . Mild degenerative changes are again noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary process .