Radio Frequency Identification Gate System to Identify Misused Personal Dosimeters

The use of two personal dosimeters, one worn over and one worn under a protective apron, provides the best estimate of effective dose. However, inappropriate positioning of dosimeters is a common occurrence, resulting in abnormally high or low radiation exposure records. Although such incorrect posi...

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Bibliographic Details
Published in:Journal of medical systems 2023-10, Vol.47 (1), p.107-107, Article 107
Main Authors: Tamura, Megumi, Kawamoto, Takeshi, Ishifuro, Minoru, Tamura, Takayuki, Masumoto, Yoshifumi, Kenjo, Masahiro, Kiguchi, Masao, Awai, Kazuo, Nagata, Yasushi
Format: Article
Language:English
Subjects:
Dosimeters
Electric fields
Health Informatics
Health Sciences
Humans
Medicine
Medicine & Public Health
Original Paper
Performance evaluation
Radiation
Radiation Dosimeters
Radiation effects
Radio frequency identification
Radio Frequency Identification Device
Radio-tagging
Statistics for Life Sciences
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Summary:The use of two personal dosimeters, one worn over and one worn under a protective apron, provides the best estimate of effective dose. However, inappropriate positioning of dosimeters is a common occurrence, resulting in abnormally high or low radiation exposure records. Although such incorrect positioning can be identified by radiation exposure records, doing so is time-consuming and labor-intensive for administrators. Therefore, a system that can identify incorrect locations of dosimeters without burdening administrators must be developed. In this study, we developed a radio frequency identification (RFID) gate system that can differentiate between two RFID-tagged dosimeters placed over and under a metal apron and identify misused dosimeters. To simulate the position of the RFID-tagged dosimeters, we designed four dosimeter-wearing classes, including “proper use” and three types of “misuse” (i.e., “reversed,” “both under,” and “both over”). When the system predicts “misuse” based on the tag reading, the worker is alerted with lights and alarms. The system performance was evaluated using a confusion matrix, with an overall accuracy of 97.75%, demonstrating high classification performance. The safety of the system against life support devices was also investigated, demonstrating that they were not affected by the electric field at 0.3 m or more from the antenna of the system under any transmit powers tested. This RFID gate system is highly capable of identifying incorrectly positioned dosimeters, enabling real-time monitoring of dosimeters to manage their positioning.
ISSN:1573-689X
0148-5598
1573-689X
DOI:10.1007/s10916-023-02002-6