Before revision: Lincolnshire and Spier ’ s bolus, which is loosely packed in polythene bags, is suitable as the bolus bags take the shape of the skin surface these bags are easily smoothed to achieve a flat surface.
After revision: Lincolnshire and Spier ' s bolus, which is loosely packed in polyethylene bags, is suitable as the bolus bags take the shape of the skin surface these bags are easily smoothed to achieve a flat surface.