ABSTRACT Aim: The gold standard in the treatment of brain tumors is radiotherapy and chemotherapy after surgery. Radiotherapy with high-energy ionizing radiation after surgery has an important place in the treatment of brain tumors. Implants with a high atomic number exhibit strong radiation attenuation and scattering properties that could potentially compromise the delivery of radiation therapy by distorting the dose distribution in and around the implant volume, complicating treatment planning in radiotherapy.