Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2018 Impact factor 0.961

Nuclear Science and Techniques ›› 2014, Vol. 25 ›› Issue (6): 060501 doi: 10.13538/j.1001-8042/nst.25.060501 arXiv: Supported by National Natural Science Foundation of China (No. 81101132) and Natural Science Foundation of Anhui Province (No. 11040606Q55)

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Radiotherapy reliability analysis based on PSA method

LI Wen-Yi1,2,3,CAO Rui-Fen1,2,3,PEI Xi1,2,3,HU Li-Qin1,2,3   

  1. 1Key Laboratory of Neutronics and Radiation Safety, Institute of Nuclear
    Energy Safety Technology, Chinese Academy of Sciences, Hefei 230031, China
    2Engineering Technology Research Center of Accurate Radiotherapy of Anhui Province, Hefei 230031, China
    3Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, SuZhou 215006, China
  • Contact: HU Li-Qin E-mail:liqin.hu@fds.org.cn
  • Supported by:

    Supported by National Natural Science Foundation of China (No.
    81101132) and Natural Science Foundation of Anhui Province (No.
    11040606Q55)

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LI Wen-Yi, CAO Rui-Fen, PEI Xi, HU Li-Qin. Radiotherapy reliability analysis based on PSA method.Nuclear Science and Techniques, 2014, 25(6): 060501     doi: 10.13538/j.1001-8042/nst.25.060501

Abstract:

The reliability of radiotherapy was evaluated and effective approaches were obtained in order to improve
radiotherapy quality by using the Probabilistic Safety Assessment (PSA) method. This study investigated the
feasibility of the PSA method being applied to radiotherapy through Image-guided Radiotherapy (IGRT) and
chest tumor irradiation. A fault tree has been constructed after analyzing causal relationship of the events.
After calculating RiskA, a total inaccuracy radiotherapy probability and the importance of all base events were
obtained. The probability of inaccurate radiotherapy was 2.87%. Under the condition that the target delineation
was perfectly right, the accuracy of radiotherapy significantly improved. With the calculation without Conebeam
Computed Tomography (CBCT) being corrected before irradiation, the accuracy significantly decreased.
The most important events were connected with the human factor. Improving human technical level could
enhance radiotherapy quality control efficiently.

Key words: Probability safety analysis, Accurate radiotherapy, Reliability, Quality control, RiskA