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http://dx.doi.org/10.7742/jksr.2019.13.1.39

The Study on Applicability of Semi-conductive Compound for Radioactive Source Tracing Dosimeter in NDT Field  

Shin, Yohan (Department of Radiation Oncology, Collage of Medicine, Inje University)
Han, Moojae (Department of Radiation Oncology, Collage of Medicine, Inje University)
Jung, Jaehoon (Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital)
Kim, Kyotae (Korea Institute of Radiological and Medical Sciences)
Heo, Yeji (Department of Medical Imaging Research Institute, Inje-university)
Lee, Deukhee (Department of Radiation Oncology, Busan Paik Hospital, Inje University)
Cho, Heunglae (Department of Radiation Oncology, Busan Paik Hospital, Inje University)
Park, Sungkwang (Department of Radiation Oncology, Busan Paik Hospital, Inje University)
Publication Information
Journal of the Korean Society of Radiology / v.13, no.1, 2019 , pp. 39-44 More about this Journal
Abstract
Radiation safety management is being considered very important since radioactive isotopes such as Co-60 and Ir-192 are widely used in fields such as non-destructive test(NDT). In this study, the applicability of Mercury(II) Iodide($HgI_2$) source for tracing system was evaluated. To make sure the unit cell sensor's reliability, we evaluated the electrical properties of the sensor made with $HgI_2$, and then position dependence of the sensor was analyzed and compared with the dose distribution from the planning system. As a result of the evaluation, high reliability of the sensor was shown through the linearity of R-sq > 0.990 and reproducibility of CV < 0.015. In the position dependence evaluation, the maximum value was measured at the isocenter of the sensor and gradually decreased according to the distance. However, the dose distribution data from the planning system was turned out that has difference with that of the sensor up to 30%. This seems to come from the difference between single-point measuring based planning system and area measuring based sensor.
Keywords
NDT; Radiation safety management; Semi-conductive compound; Mercury Iodide; Radioactive source tracing;
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