Specifically, these methods reassess shielding calculations in X-ray areas with respect to the methodology of the calculation of the barrier thickness and the number of sources consider in the area. Thus, they generate an overall solution for the cases met at the medical radiation structural design. This report provides an extension of an existing method for the calculation of the barrier thickness required to reduce the three types of radiation exposure emitted from the source, the primary, secondary and leakage radiation, to a specified weekly design limit (MPD). Because each of these three types of radiation are of different beam quality, having different shielding requirements, NCRP 49 has provided means to calculate the necessary protective barrier thickness for each type of radiation individually. However, this report (NCRP 49) provides little guidance for the contribution of each of the three types of radiation to the barrier thickness requirement. The medical physicist have to estimate which components of the field are most important to be shielded and how they are to combine, if more than one component is significant to generate a single shielding requirement. In questionable situations, multiple half-value layers (HVLs) of material recommended to be added; by the general "add one half value layer (HVL)" approximation of NCRP 49.