Research on the Impact of Metal Implants with Different Materials on Radiation Dose Distribution
10.3969/j.issn.1671-7104.2013.04.019
- VernacularTitle:不同材质金属植入物对放疗剂量分布影响的研究
- Author:
Ruiyao JIANG
1
;
Fei XIONG
;
Guofeng HUANG
Author Information
1. 上海交通大学附属第六人民医院医学装备处
- Keywords:
metal implants;
dose distribution
- From:
Chinese Journal of Medical Instrumentation
2013;(4):301-303
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the impact of metal implants with different materials on radiation dose distribution based on film measurement method. Methods Titanium plate, titanium intramedul ary pin and stainless steel plate were set into phantom and irradiated separately by 6 MV and 15 MV X ray from linear accelerator. Dose distributions derived from different materials metal implants were measured and analyzed by film dosimeter. Results For 6 MV X ray, the maximum interface dose increments of titanium plate, titanium intramedul ary pin and stainless steel plate were 12.3%, 15.4%and 20.3%. As the radiation energy was increased from 6 MV to 15MV, the maximum interface dose increment of the titanium plate rose from 12.3% to 15.1%, the maximum interface dose increment of the steel plate rose from 20.3% to 30.8%. Conclusions Metal implants with different materials have obvious impact on radiation dose distribution. With the increase of the metal atomic number and energy of radiation, the degree of elevated dose also increases. These results suggest that correction of dose distribution is required for radiotherapy of patients with metal implants.
