Nuclear Techniques ›› 2017, Vol. 40 ›› Issue (7): 70501-070501.doi: 10.11889/j.0253-3219.2017.hjs.40.070501


Determination of dosimetric characteristics for the model number 6711 125I seed source with the point-kernel method

MENG Beidi1,2, CAO Zhen3,4, SHI Cuiyan2, CUI Haiping1,2   

  1. 1. China Institute of Atomic Energy, Beijing 102413, China;
    2. Beijing Atom High Tech Co., Ltd., Beijing 102413, China;
    3. Nuctech Company Limited, Beijing 100084, China;
    4. Department of Engineering Physics, Tsinghua University, Beijing 100084, China
  • Received:2017-02-20 Revised:2017-03-28 Online:2017-07-10 Published:2017-07-10
  • About author:10.11889/j.0253-3219.2017.hjs.40.070501

Abstract: Background: The 125I brachytherapy source has become a popular treatment option in the treatment various tumors, in order to reduce the risk of surrounding normal tissue, it is important to know the dosimetric characteristics of seed source. Purpose: The aim is to develop a reliable and saving time method for calculating the dosimetric parameters of seed source. Methods: Dosimetric parameters (dose rate constant, radial dose function and anisotropy function) of the model number 6711 125I seed source are calculated with point-kernel method following American association of physicists in medicine (AAPM) TG-43U1 recommendations. Results: The result was compared with the relative data recommended by AAPM TG-43U1 and Monte-Carlo (M-C) method. Dose rate constant with AAPM was in agreement with 6.76%, and that with M-C is 6.19%; radial dose function (except 0.1 cm, 0.15 cm and 0.25 cm) with AAPM is within 0.02%-2.27%, and that with M-C is within 0.06%-6.65%. Conclusion: The point-kernel method can be applicable to calculate the dosimetric characteristics of seed sources.

Key words: Point-kernel integration method, Dosimetric parameters, 125I seed source

CLC Number: 

  • TL929