Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are normal . Lungs are clear . Pulmonary vasculature is normal . No pleural effusion or pneumothorax is seen . Bilateral posterior fixation rods with multiple pedicle screws and interlaminar hooks are seen spanning the thoracolumbar spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .