Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top normal . The aorta is tortuous and aortic knob calcifications are demonstrated . Assessment of the mediastinal contour is somewhat limited due to the presence of bilateral ___ rods extending from the cervical spine to the lumbar spine . There is no pulmonary vascular congestion . Apart from minimal atelectasis at the lung bases , the lungs are clear . No large pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary abnormality .