Evaluation of the effectiveness of defense measures during radiological risk assessment in gynecological brachytherapy

C. C. Dominguez; A. Torres; R. Alfonso

doi:10.15392/2319-0612.2024.2347

Authors

C. C. Dominguez Department of Medical Physics, Nuclear Safety Directorate https://orcid.org/0000-0002-4658-975X
A. Torres High Institute of Applied Technologies and Sciences, University of Havana
R. Alfonso High Institute of Applied Technologies and Sciences, University of Havana

DOI:

https://doi.org/10.15392/2319-0612.2024.2347

Keywords:

risk, gynecologic brachytherapy, FMEA, defenses, Effectiveness

Abstract

The implementation of risk analysis to all those practices that work with ionizing radiation is of paramount importance. Thanks to the studies published on risk assessment in radiation medicine, a culture on this subject is being created, which has led to the systematization of different methods created for this purpose. Such is the case of the Failure Mode and Effects Analysis (FMEA), the basis on which this research has been developed. The American Association of Physicist in Medicine (AAMP) TG-100 report, which provides all the details on the use of this technique, is used as main reference. On the other hand, the recommendations recently published by AAMP TG-275 report are also used, applying the FMEA methodology to the high dose rate gynecological brachytherapy (B-HDR-GYN), among other practices. The novelty of this research is the implementation of an operational algorithm that improves the analytical capacity of the traditional FMEA approach by allowing the measurement of the effectiveness of defense measures within it. In this study, when the defense measures interact in the FMEA, a decrease of four RPN values of the failure modes (FM) occurs; compared to reference values. This algorithm is based on a synergy of the risk matrix (RM) approach and the information on FMEA available in the TG-100 and TG-275.

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