Many times a bolus is desired to bring dose to the patient surface. And many times a patients irregular anatomy makes it hard to eliminate air gaps using conventional bolus materials. Daily reproduce-ability can be difficult and time consuming. Tissue expanders, surgical defects, noses, and scalps are a few examples. .decimal boluses are precision milled from a tissue equivalent wax. The milling coordinates are derived from the external contour of the patient as provided by the treatment planning system. We are able to mill the device to the patient’s contour thus providing a snug fitting bolus that will be the same on the first day of treatment as the last, making daily reproduce-ability quick and accurate.