title: [Research on the impact of metal implants with different materials on radiation dose distribution].
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 intramedullary 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 intramedullary 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.
authors.affiliation: Medical Equipment Dept, 6th People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai 200233. jiang-ruiyao@126.com
authors.forename: Ruiyao
authors.initials: R
authors.lastname: Jiang
authors.forename: Fei
authors.initials: F
authors.lastname: Xiong
authors.forename: Guofeng
authors.initials: G
authors.lastname: Huang
mesh_terms: D008670:Metals; D019736:Prostheses and Implants; D011879:Radiotherapy Dosage
chemical_list: D008670:Metals