Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been prior median sternotomy and coronary artery bypass surgery . Stable appearance of the cardiomediastinal contours . Numerous calcified pleural plaques are present , in keeping with prior asbestos exposure . No focal areas of consolidation are evident within the lungs . There are no pleural effusions or pneumothoraces .
    OUTPUT:
    
Calcified pleural plaques , in keeping with prior asbestos exposure . No radiographic evidence of pneumonia .