RADIATION PROTECTION BULLETIN

CONTENTS

RADIATION PROTECTION BULLETIN. 2024, 44(4): 0-0.

Abstract ( 26 )

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Effect of software-based scatter correction on radiation dose in mammography

CHEN Lu, GAO Zhizhen

RADIATION PROTECTION BULLETIN. 2024, 44(4): 1-6.

Abstract ( 31 )

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Purpose: This study investigated the relationship between average glandular dose and compressed thickness and gland type in the software-based Progressive Reconstruction Intelligently Minimizing Exposure (PRIME) model. The extent of average glandular dose reduction(AGD) in PRIME mode is compared to full field digital mammography (FFDM) and influencing factors. Materials and Methods: 515 female patients who underwent PRIME mode and FFDM on the left and right breast under the same compressed thickness were collected respectively. A total of 1 030 breast craniocaudal view images and 1 030 breast mediolateral oblique view images were analyzed. Results: Breast compressed thickness was positively and strongly correlated with AGD_PRIME (r=0.698, P<0.001), gland type and compressed force were positively and weakly correlated with AGD_PRIME (r=0.227,r=0.228,P<0.001), and age was negatively correlated with AGD_PRIME (r=-0.327,P<0.001 0 .Breast compressed thickness, gland type, compressed force and age were independent factors for AGD_PRIME (B_{compressed thickness}=0.025, B_{gland type}=0.238, B_{compressed force}=0.001, B_age=-0.007, P<0.001). The standardized coefficients of compressed thickness, gland type, compressed force and age were 0.735, 0.229, 0.106 and -0.244, respectively. The effect of compressed thickness on AGD_PRIME was greater than that of gland type. Breast compressed thickness and age were negatively correlated with △AGD (AGD_FFDM minus AGD_PRIME) (r=-0.565,r=-0.127,P＜0.001), while gland type was positively correlated with △AGD (r=0.159,P＜0.001). Breast compressed thickness and age were independent factors of △AGD (B_{compressed thickness}=-0.011,B_age=-0.002,the standardization coefficients were -0.558 and -0.104, respectively). Breast compressed thickness was negatively correlated with the rate of dose-reduction in PRIME mode, and linear fitting showed a higher dose reduction in thinner breasts. Conclusions: AGD_PRIME is positively correlated with breast compressed thickness, gland type and compressed force, and compressed thickness has a greater effect on AGD_PRIME. △AGD is negatively correlated with compressed thickness and age, and the effect of PRIME acquisition mode on reducing glandular dose in young patients with small breast compressed thickness is more obvious.

Risk assessment of radiation accidents in industrial radiographic inspection based on risk matrix method

WU Zhao, WU Chengyong, XUE Xiangming, ZHAN Jingming, YANG Ruinian

RADIATION PROTECTION BULLETIN. 2024, 44(4): 7-11.

Abstract ( 15 )

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In this paper, the risk factors were systematically analyzed using the risk matrix method by collecting previous cases of radiation accidents in industrial radiographic inspection in China. The study shows that among the 17 risk factors leading to radiation accidents in industrial radiographic inspection, 6 are general risk factors, 10 are medium risk factors, and 1 is a major risk factor. Tailored protective measures and strategies were proposed based on the risk analysis results.

Current situation investigation and influencing factor analysis on knowledge, attitude and practice of radiation protection among some medical staff in Changsha City

YANG Xuejiao, LIU Gaoming, XIANG Guliang, NI Qianxi

RADIATION PROTECTION BULLETIN. 2024, 44(4): 12-20.

Abstract ( 16 )

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Objective To investigate the status of knowledge, attitude and practice of radiation protection among medical staff, analyze the influencing factors, provide a basis for developing intervention measures to improve radiation protection capability of medical staff. Methods Using the method of cluster sampling, two Category Ⅲ Grade A comprehensive hospitals and two oncology specialized hospitals in Changsha were selected. A self-designed score scale for radiation protection knowledge, attitude and practice was used to investigate the medical staff of medical radiation related departments such as nuclear medicine, radiology imaging, and radiotherapy. The current situation and influencing factors of radiation protection knowledge, attitude and practice among medical staff were analyzed. Results The scores of radiation protection knowledge, attitude and practice of 395 medical staff were (35.02±8.86), (33.50±4.06), (23.66±6.05), and (92.19±15.62), respectively. The knowledge dimension has the lowest score rate at 43.66%, while the attitude dimension has the highest score rate at 96.94%, and the score rate of practice dimension is 85.97%. Analysis shows that different occupational categories, willingness to participate in training, grouping of training frequency, whether personal dose files are established, whether workplace protection meets regulations, professional titles, whether radiation damage has been witnessed, and whether the department regularly checks equipment performance are the main influencing factors on the level of radiation protection knowledge and practice among medical staff (P<0.05). Conclusion Medical staff have a positive attitude towards radiation protection, but their knowledge level is relatively low and their practice needs to be improved. Therefore, a training system should be improved to improve their knowledge, attitude and practice level in radiation protection.

Research trends of radiation sensitive gene detection used in biodosimetry

CHEN Yuting, YANG Xueqin, WANG Gefei

RADIATION PROTECTION BULLETIN. 2024, 44(4): 21-31.

Abstract ( 15 )

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Using visual bibliometric analysis software CiteSpace (6.2.R4) and VOSviewer (version 1.6.19), the application and development of radiation sensitive gene detection in biodosimetry are summarized. Articles and reviews related to this field published between 2000 and 2023 were selected from Web of Science Core Collection and CNKI to analyze authors, institutions, journals, references and keywords in this field. The results of WOS database showed that from 2000 to 2023, the total of papers on radiation sensitive gene detection as a biodosimetry increased from 3 to 297. The United States topped the list in this field and China ranked the seventh. Radiation Research, International Journal of Radiation Biology, Scientific Reports, Health Physics were the most important journals in this field also had high co-citation frequency. Keyword cluster analysis showed that research focused on the damage-repair of DNA, apoptosis, p53 signaling pathway, in vivo-in vitro tests, and biodosimetry model systems. The co-cited references analysis showed that the application of FDXR gene detection as a biodosimetry have become the hotspot of this field. The CNKI database analysis showed that the dose-response relationship of genes (MDM2, GADD45, XPC, FDXR, HPRT) were main direction of studying in this field in China. At the same time, it is suggested that gene cluster examination is the future research direction of gene detection as biodosimetry.

Some thoughts on neutron dose monitoring practice at Taishan Nuclear Power Plant

REN Xueming, MA Boyang, HE Weihua, ZHOU Jiequan, ZHU Shuiping

RADIATION PROTECTION BULLETIN. 2024, 44(4): 32-37.

Abstract ( 34 )

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This article introduces the practices of neutron radiation monitoring and neutron dose monitoring carried out by Taishan Nuclear Power Plant in recent years, and conducts compliance analysis of neutron dose monitoring based on the practical situation. This article also discusses the requirements of domestic and foreign regulations and standards for neutron dose monitoring in nuclear power plants. Analysis suggests that the dose monitoring practices carried out by Taishan Nuclear Power Plant for neutron radiation in recent years comply with relevant domestic regulations and standards. However, it is found that the current regulations and standards for neutron radiation monitoring in nuclear power plants in China are not yet complete. The IAEA general safety guidance and some foreign countries have relative cleare regulations on neutron dose monitoring in nuclear power plants. This article suggests that relevant organizations in China should consider developing relevant guidance standards for neutron dose monitoring in nuclear power plants, and each nuclear power plant should conduct neutron dose monitoring and evaluation based on its own situation.

Feasibility study on the decentralization of approval authority and management of category Ⅱ radiation-emitting devices: Taking Guangxi as an example

LI Lihong, LIU Jingxi, WU Yichao, YI Yao, XU Pin, SHI Weili

RADIATION PROTECTION BULLETIN. 2024, 44(4): 38-43.

Abstract ( 25 )

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The 18th National Congress of the Communist Party of China clearly stated that: "We should deepen the reform of the system concerning matters subject to government examination and approval, continue to streamline administration and delegate more power to lower government levels, and make the government better perform its functions of creating a favorable environment for development, providing high quality public services, and maintaining social fairness and justice." In order to further deepen the reforms to streamline administration and delegate power in the field of ecological environment, promote the reform of "decentralization, management, and service" in the field of radiation environment, and serve the high-quality development of of Guangxi′s social economy. Guangxi intends to decentralize the approval authority of nuclear technology utilization project using category Ⅱ radiation-emitting devices to cities with established districts. Through the investigation and analysis of the approval and supervision capacity of various cities in Guangxi, in order to determine the feasibility of delegating the approval authority of category Ⅱ radiation-emitting devices to cities with established districts.

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