Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were acquired . Lung volumes are low , causing exaggeration of the heart size and accentuation of the pulmonary vasculature . The lungs are clear . The heart size is within normal limits . The mediastinal contours are normal . There are no pleural effusions . No pneumothorax is seen . Multilevel degenerative changes of the thoracolumbar spine are noted . Spinal fusion hardware is seen within the lumbar spine .
    OUTPUT:
    
No acute cardiac or pulmonary process . The colon is interposed between the dome of the liver and a chronically elevated right hemidiaphragm ; there is no free subdiaphragmatic gas .