Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are within normal limits . The trachea is central . The cardiomediastinal contour is normal . The heart is not enlarged . The patient has known calcified pleural plaques are not well visualized on today 's study . No focal consolidation , pneumothorax or pleural effusion seen . Mild degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary process seen . Calcified pleural plaques consistent with prior asbestos exposure .