Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest provided . Patient is status post multilevel posterior fusion . Lung volumes are low . The lungs are clear . No pleural effusion or pneumothorax . Hilar contours are normal . Mild widening of the mediastinum is likely lipomatosis .
    OUTPUT:
    
1 . No radiographic evidence for pneumonia . 2 . Patient is status post multilevel posterior fusion without evidence of complication .