“In the field of radiation therapy, new progress has been made in the research of radiation source terms and shielding protection for high-energy medical linear accelerators. Experts used MCNP software to simulate the 15 MV X-ray beam generated by the Clinac 23EX accelerator, established a fine model, and calculated the percentage depth dose and profile relative dose curves under different irradiation fields. The simulation results are basically consistent with the measured data, providing reference for subsequent research and optimization of shielding design.”