Impact of Metal Implants with Two Different Materials on Radiation Dose Distribution
HE Xueping1, NI Xinye2
1. Department of Radiotherapy, Zhangjiagang First People’s Hospital, Suzhou Jiangsu 215600, China;
2. Department of Radiotherapy, Changzhou No.2 People’s Hospital, Nanjing Medical University, Changzhou Jiangsu 213003, China
Abstract：Objective To analyze the effects of metal implants with two different materials (stainless steel and titanium alloy)
on radiation dose distribution. Methods Firstly, Monte Carlo method was used to model the accelerator heads. The depth dose
distribution of stainless steel and titanium alloy implants (thickness 0.4, 1, 2, 4 cm, respectively) in water was simulatively calculated
with 6 MV X ray. The difference in dose distribution caused by different materials was analyzed, and the dose changes of the rays on
the incident and exit surfaces of the implants were compared emphatically. Results In water, the doses on the incidence surfaces of
stainless steel and titanium alloy implants were about 24% and 20% higher than those of water, respectively. The doses on the exit
surfaces were reduced by about 16.2%-55.1% and 11.5%-35.0%. Conclusion The effect of stainless steel implants on radiation dose
is greater than that of titanium alloy implants. For patients with metal implants, it is advisable to choose titanium alloy implants in
radiation therapy.
何雪平1，倪昕晔2. 两种材质的金属植入物对放疗剂量分布影响的研究[J]. 中国医疗设备, 2018, 33(12): 54-56.
HE Xueping1, NI Xinye2. Impact of Metal Implants with Two Different Materials on Radiation Dose Distribution. China Medical Devices, 2018, 33(12): 54-56.
