Considerations for MR-linac bunker shielding design.

To show the considerations followed for MR-linac in shielding design for the first MR-linac in Mexico following the national clinical necessities.The National Council on Radiation Protection and Measurements (NCRP) 151 recommendations were followed for the shielding design for primary and secondary barriers and the door design. The calculations were made considering the clinical demands in the country, that is, intensity modulated (IMRT) and 3D conformal radiotherapy (3DC-RT) in 80%-20% proportion.