Radiation Medicine and Protection最新文献

{"title":"Evaluation of radiation shielding performance in thallium borotellurite glasses","authors":"M.R. Alipoor,&nbsp;M. Eshghi,&nbsp;R. Razavi","doi":"10.1016/j.radmp.2026.06.002","DOIUrl":"10.1016/j.radmp.2026.06.002","url":null,"abstract":"<div><h3>Objective</h3><div>To evaluate the impact of Neodymium(III) chloride (NdCl₃) doping on the gamma radiation shielding performance of borotellurite glasses with nominal compositions in the system 65B₂O₃–12.5Tl₂O–12.5TeO₂–(10−<em>x</em>)Na₂O–<em>x</em> NdCl₃ (where <em>x</em> = 0, 1, 2, 5, and 10 wt% of NdCl₃), introduced via NdCl₃ precursor.</div></div><div><h3>Methods</h3><div>Glass batches were calculated by replacing Na₂O wt% with NdCl₃ on an equimolar oxygen basis relative to NdCl₃. The BTTLNN series—namely BTTLNN0, BTTLNN1, BTTLNN2, BTTLNN5, and BTTLNN10—has nominal NdCl₃ equivalent concentrations of 0, 1, 2, 5, and 10 <em>wt</em>%, respectively. All compositions were simulated for gamma shielding properties. Their radiation attenuation parameters were computed using the Geant4 toolkit across a broad energy range (15 keV to 10 MeV), with results validated against Phy-X software. Key metrics analyzed included mass attenuation coefficient (MAC), half-value layer (HVL), tenth-value layer (TVL), radiation protection efficiency (RPE), and effective atomic number (<em>Z</em>_eff).</div></div><div><h3>Results</h3><div>The mass attenuation coefficient increased directly with NdCl₃ concentration, with a pronounced difference of 0.048,26 cm²/g at 0.15 MeV between the lowest and highest NdCl₃ contents. Increased density (3.84–4.02 g/cm³) and improved attenuation corresponded with decreasing HVL, TVL, and RPE. <em>Z</em>_eff peaked at specific energies (e.g., 85.53 keV) before declining at higher energies, consistent with MAC trends. In the BTTLNN series—namely BTTLNN0, BTTLNN1, BTTLNN2, BTTLNN5, and BTTLNN10—the shielding performance gradually increases with increasing NdCl₃ content. Comparative analysis confirmed the sample with 10 wt% NdCl₃ (BTTLNN10) exhibited the highest attenuation and lowest HVL among the series and outperformed several reference shielding materials.</div></div><div><h3>Conclusion</h3><div>Doping with NdCl₃ significantly enhances the gamma radiation shielding effectiveness of the base borotellurite glass. The findings demonstrate that NdCl₃ incorporation is a viable and novel strategy for engineering advanced heavy-metal oxide glasses with superior radiation shielding properties.</div></div>","PeriodicalId":34051,"journal":{"name":"Radiation Medicine and Protection","volume":"7 4","pages":"Pages 229-238"},"PeriodicalIF":0.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148694204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lunar surface radiation environment simulation and health risk assessment for Chinese astronauts during lunar surface activities","authors":"Desong Zhang,&nbsp;Jiawei Feng,&nbsp;Chenxu Wei,&nbsp;Kun Zhu,&nbsp;Zile Deng,&nbsp;Tong Zhang,&nbsp;Hua Li,&nbsp;Liye Liu,&nbsp;Congchong Yan","doi":"10.1016/j.radmp.2026.06.004","DOIUrl":"10.1016/j.radmp.2026.06.004","url":null,"abstract":"<div><h3>Objective</h3><div>To evaluate radiation exposure and lifetime cancer risk for Chinese astronauts during lunar surface activities, based on an integrated framework developed to combine lunar surface radiation transport, organ dosimetry, and population-specific health risk assessment.</div></div><div><h3>Methods</h3><div>A lunar surface radiation transport model was developed in Geant4 using the ICRP 145 adult male mesh-type reference computational phantom, shielded with 1 g/cm² aluminum and positioned on lunar soil based on the Chang'e−5 regolith composition. Under a Galactic Cosmic Ray (GCR) environment, organ absorbed dose, dose equivalent, and whole-body effective dose were calculated. For risk assessment, a population-adjusted cancer risk assessment framework was developed based on the NASA Space Cancer Risk model (NSCR-2012). By incorporating Chinese life-table data and background cancer incidence and mortality statistics, the model was used to estimate the Risk of Exposure-Induced Cancer (REIC) and the Risk of Exposure-Induced Death (REID) for a 30-d lunar surface mission.</div></div><div><h3>Results</h3><div>Under 1 g/cm² aluminum shielding, absorbed dose rates to major organs ranged from 0.174 to 0.196 mGy/d, organ dose equivalent rates ranged from 0.36 to 0.65 mSv/d, and the effective dose rate was 0.50 mSv/d, with protons contributing approximately 39%. Risk assessment based on Chinese population background data showed that both lifetime REIC and REID from a 30-day lunar surface mission decreased monotonically with increasing age at exposure. Specifically, REIC decreased from 0.1621% at 20 years to 0.0422% at 65 years, while REID decreased from 0.1060% to 0.0386%. In terms of site-specific risk composition, lung cancer was the leading contributor to mortality risk, whereas stomach, esophageal, and liver cancers, together with other cancers, also made substantial contributions to the total risk profile.</div></div><div><h3>Conclusion</h3><div>The integrated framework developed in this study provides a modeled, population-specific estimate of radiation-induced cancer risk for a Chinese adult male reference astronaut under a defined 30-d GCR-dominated lunar-surface scenario. These results may serve as a methodological reference for future comparative assessments of shielding, mission duration, and radiation-risk management.</div></div>","PeriodicalId":34051,"journal":{"name":"Radiation Medicine and Protection","volume":"7 4","pages":"Pages 219-228"},"PeriodicalIF":0.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148694203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Trends and distribution of occupational dose indicators in diagnostic radiology facilities, Greater Accra, Ghana (2021−2025)","authors":"Philip Owusu-Manteaw,&nbsp;Eric C.D.K Addison,&nbsp;Martin Owusu-Mensah,&nbsp;Joseph Adom,&nbsp;Philip Deatanyah,&nbsp;Benjamin Asamoah Boafo","doi":"10.1016/j.radmp.2026.06.003","DOIUrl":"10.1016/j.radmp.2026.06.003","url":null,"abstract":"<div><h3>Objective</h3><div>To quantify facility-level patterns and variability of deep personal dose equivalent <em>H</em>_p (10) and shallow <em>H</em>_p (0.07) in diagnostic radiology facilities in Greater Accra, Ghana, from 2021 to October 2025.</div></div><div><h3>Methods</h3><div>A retrospective analysis of 306 de-identified facility-year/partial-year dosimeter badge summaries from the Ghana Atomic Energy Commission (GAEC) Personal Dosimetry Service was performed. Records covered complete calendar years for 2021-2024 and available 2025 returns up to October 2025. Annual distributions were summarized using medians and quartiles; outliers were flagged as values above <em>Q</em>₃ + 1.5 × <em>IQR</em>. The 2023 records were reprocessed and retained after verification because the elevated values persisted after data checks. An exploratory trend assessment used the Mann-Kendall test and the Sen slope estimator.</div></div><div><h3>Results</h3><div>Outliers were most frequent in 2023 (12/64; 18.8%); five facility-level average <em>H</em>_p (10) values exceeded 5 mSv (maximum 14.06 mSv). Mean <em>H</em>_p (0.07) peaked in 2023 [(2.02 ± 3.37) mSv] and correlated strongly with <em>H</em>_p (10) (Spearman rho = 0.953, <em>P</em> &lt; 0.001). Exploratory trend testing did not detect a statistically significant monotonic trend (Mann-Kendall <em>Z</em> = −0.73, <em>P</em> = 0.462).</div></div><div><h3>Conclusions</h3><div>Facility-level dose indicators were generally low relative to international occupational limits, but the right-skewed distribution and pronounced 2023 outlier burden justify targeted facility investigations, faster dosimetry feedback, and strengthened optimization practices.</div></div>","PeriodicalId":34051,"journal":{"name":"Radiation Medicine and Protection","volume":"7 4","pages":"Pages 239-244"},"PeriodicalIF":0.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148694180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ginsenoside Rg1 protects against radiation-induced hippocampal injury via downregulation of lncRNA ENPP2-AS to alleviate oxidative stress and inflammation","authors":"Yiquan Ou,&nbsp;Yu Liu,&nbsp;Zehui Hu,&nbsp;Zhangzhan Li,&nbsp;Sihong Long,&nbsp;Yipeng Chen,&nbsp;Zhisheng Yao,&nbsp;Weichao Zhao,&nbsp;Dingxin Long","doi":"10.1016/j.radmp.2026.06.005","DOIUrl":"10.1016/j.radmp.2026.06.005","url":null,"abstract":"<div><h3>Objective</h3><div>To evaluate whether ginsenoside Rg1 protects against cranial irradiation-induced hippocampal injury and cognitive decline, and to explore the underlying lncRNA-mediated mechanisms via transcriptomic analysis.</div></div><div><h3>Methods</h3><div>Sixty-four male C57BL/6J mice were divided into four groups (Control, IR, IR + Rg1, and Rg1; <em>n</em> = 16). Mice in the IR + Rg1 and Rg1 groups received Rg1 (20 mg/kg, i.p.) for 30 d, then the IR and IR + Rg1 groups were exposed to 5 Gy whole-brain X-ray irradiation. Hippocampal tissues were collected at 30 and 90 d post-irradiation. Morris water maze was used to assess spatial learning and memory, immunofluorescence staining to evaluate hippocampal neurogenesis; and ELISA to measure inflammatory cytokines. <em>In vitro</em>, hippocampal neuronal cell line HT22 cells were divided into six groups (control, IR, IR + Rg1 at 20, 40, or 80 μg/mL, and IR + SB 216763). siRNA silencing was used to examine the function of candidate lncRNAs in HT22 cells.</div></div><div><h3>Results</h3><div>Rg1 improved spatial memory at 90 d, with reduced escape latency [IR: (11.44 ± 0.86) s <em>vs.</em> IR + Rg1: (6.49 ± 0.88) s, <em>t</em> = 4.40, <em>P</em> &lt; 0.05]. Rg1 enhanced neurogenesis (BrdU+/DCX + cells: IR: 8.00 ± 2.08 <em>vs.</em> IR + Rg1: 40.30 ± 4.81, <em>t</em> = 6.34, <em>P</em> &lt; 0.05), and reduced IL-1β (IR: 50.43 ± 1.19 <em>vs.</em> IR + Rg1: 33.35 ± 0.57, <em>t</em> = 13.70, <em>P</em> &lt; 0.05). Transcriptomic analysis identified ENPP2-AS as a novel radiation-responsive lncRNA downregulated by Rg1; its knockdown reduced downstream targets (Enpp2 and Ttr) and recapitulated the antioxidant and anti-inflammatory effects in HT22 cells.</div></div><div><h3>Conclusions</h3><div>Ginsenoside Rg1 alleviates radiation-induced hippocampal injury and cognitive impairment by downregulating ENPP2-AS to mitigate oxidative stress and inflammation.</div></div>","PeriodicalId":34051,"journal":{"name":"Radiation Medicine and Protection","volume":"7 4","pages":"Pages 187-201"},"PeriodicalIF":0.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148694200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comment on “Comparison of dose sparing between visual feedback guided- and active breathing coordinator-assisted deep inspiration breath hold for left whole breast radiotherapy”","authors":"Swarupanjali Padhi,&nbsp;Prashant Ramdas Kokiwar,&nbsp;Janvi Patel,&nbsp;Ankita Kalra","doi":"10.1016/j.radmp.2026.05.003","DOIUrl":"10.1016/j.radmp.2026.05.003","url":null,"abstract":"","PeriodicalId":34051,"journal":{"name":"Radiation Medicine and Protection","volume":"7 4","pages":"Pages 251-252"},"PeriodicalIF":0.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148694260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Measurement method studies on radon and radon-thoron progeny","authors":"Qiuju Guo,&nbsp;Lei Zhang","doi":"10.1016/j.radmp.2026.04.005","DOIUrl":"10.1016/j.radmp.2026.04.005","url":null,"abstract":"<div><div>Radon and thoron exposure represents the largest component of public radiation dose from natural sources. While radon and thoron gases themselves contribute to this exposure, their short-lived decay products account for the majority of the effective dose. Accurate dose assessment therefore relies on precise measurements of radon and thoron progeny, including their activity concentrations, unattached fractions, and aerosol size distributions. Additionally, due to their radioactive properties and suitable half-lives, radon and its decay products serve as valuable tracers in atmospheric and environmental research, especially in applications requiring long-term continuous monitoring. This paper reviews recent progress and achievements from the Environmental Radioactivity Laboratory of Peking University in the development of measurement methods for radon and radon-thoron progeny. It highlights innovative aspects, fundamental performance characteristics, and key technical specifications of the methods and instruments designed for various measurement purposes and employed in practical applications.</div></div>","PeriodicalId":34051,"journal":{"name":"Radiation Medicine and Protection","volume":"7 4","pages":"Pages 245-250"},"PeriodicalIF":0.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148694181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Radiation research at Hirosaki University after the Fukushima accident: Contributions to public health, education, and community resilience","authors":"Masahiro Hosoda ,&nbsp;Donovan Anderson ,&nbsp;Ryohei Yamada ,&nbsp;Yohei Fujishima ,&nbsp;Kazutaka Tanaka ,&nbsp;Hiromi Kudo ,&nbsp;Yasutaka Omori ,&nbsp;Chutima Kranrod ,&nbsp;Hirofumi Tazoe ,&nbsp;Naofumi Akata ,&nbsp;Chieko Itaki ,&nbsp;Tomisato Miura ,&nbsp;Ikuo Kashiwakura ,&nbsp;Shinji Tokonami","doi":"10.1016/j.radmp.2026.05.001","DOIUrl":"10.1016/j.radmp.2026.05.001","url":null,"abstract":"<div><div>Since the Fukushima Daiichi Nuclear Power Plant accident in 2011, Hirosaki University has conducted a comprehensive program of scientific investigation, radiation dose assessment, technological innovation, risk communication, and community support in collaboration with Namie Town and surrounding municipalities. This review summarizes the university's major contributions from 2011 to 2025, integrating findings across early-phase emergency response, reconstruction-phase environmental monitoring, analytical method development, and education and outreach activities. Rapid radiation surveys and thyroid dose assessments provided essential evidence for protective actions immediately after the accident, while long-term monitoring clarified spatial and temporal trends in external and internal exposure, quantified the effectiveness of decontamination, and distinguished natural from accident-derived radiation. Advances in radiation detection, such as portable continuous air monitors, optimized filters, and high-sensitivity analytical protocols (³H, ⁹⁰Sr, ¹³⁷Cs, and actinides), enhanced Japan's preparedness for future radiological emergencies. Studies of radionuclide behavior in terrestrial and aquatic environments, including riverine speciation, coastal dispersion, and plant uptake, improved understanding of long-term environmental transport. Parallel risk communication efforts, educational programs, and nature-based learning initiatives supported psychological recovery, strengthened radiation literacy, and contributed to community resilience. Collectively, these activities demonstrate how integrated scientific and community-engaged approaches in radiation medicine and environmental protection can advance the United Nations Sustainable Development Goals (SDGs), particularly SDG 3 (Good Health and Well-being), SDG 14 (Life Below Water), and SDG 15 (Life on Land). The Hirosaki University model provides a replicable framework for sustainable recovery following nuclear emergencies.</div></div>","PeriodicalId":34051,"journal":{"name":"Radiation Medicine and Protection","volume":"7 3","pages":"Pages 124-136"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148214695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Over-modulated plan undermines prognosis of small cell lung cancer patients treated under free-breathing: analysis based on a multicenter, open-label, phase 3 trial","authors":"Junqian Yang ,&nbsp;Jiayi Yu ,&nbsp;Ying Guan ,&nbsp;Zhengxian Li ,&nbsp;Jiazhou Wang ,&nbsp;Xinghong Yao ,&nbsp;Wei Zhang ,&nbsp;Jixiang Hou ,&nbsp;Zhenli Wang ,&nbsp;Qijian Lu ,&nbsp;Lekang Chen ,&nbsp;Shutong Yu ,&nbsp;Yin Jiang ,&nbsp;Anhui Shi ,&nbsp;Yibao Zhang","doi":"10.1016/j.radmp.2026.04.007","DOIUrl":"10.1016/j.radmp.2026.04.007","url":null,"abstract":"<div><h3>Objective</h3><div>To investigate the clinical impact of plan complexity on local progression-free survival (LPFS) and overall survival (OS) in limited-stage small cell lung cancer (LS-SCLC) patients treated with hyper-fractionated radiotherapy.</div></div><div><h3>Methods</h3><div>Partially based on a multicenter, open-label, phase 3 trial in China, this study included 209 treatment plans from 193 LS-SCLC patients of 7 institutions. Plan average beam area (PA), plan averaged beam modulation (PM) and monitor unit per Gy (MU/Gy) were calculated as indicators of plan complexity. Based on the statistical significance of these metrics and their correlation with survival time, cutoff values determined by the Youden's index were used to stratify patients into high complexity (HC) and low complexity (LC) groups. Kaplan-Meier analysis, Cox regression, and random survival forest (RSF) models were employed to analyze LPFS and OS. Propensity-score-matched pairs were generated to minimize bias in the baseline.</div></div><div><h3>Results</h3><div>The median follow-up time for the selected patients was 28.77 (interquartile range 22.43–51.90) months. Variable importance and minimal depth methods based on RSF revealed the significant prognostic capability of PM. The 1-, 2-, and 3-year LPFS rates and OS rates in the PM-defined HC group were significantly lower than those in the LC group (<em>P</em> &lt; 0.05). However, no significant difference was observed between the HC and LC groups using other definitions of plan complexity (all <em>P</em> &gt; 0.05).</div></div><div><h3>Conclusions</h3><div>Complex radiotherapy plan significantly reduced the LPFS and OS of limited-stage SCLC patients. PM should be optimized during the planning or evaluation to improve the clinical prognosis.</div></div>","PeriodicalId":34051,"journal":{"name":"Radiation Medicine and Protection","volume":"7 3","pages":"Pages 137-142"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148214720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrogel-based approaches for radiation protection in radiotherapy","authors":"Mingliang Zhu ,&nbsp;Wenyan Sun ,&nbsp;Ya Li ,&nbsp;Liangda Xing ,&nbsp;Yinnong Jia","doi":"10.1016/j.radmp.2026.04.004","DOIUrl":"10.1016/j.radmp.2026.04.004","url":null,"abstract":"<div><div>As one of the primary modalities for cancer treatment, radiotherapy (RT) utilizes high-energy radiation to eradicate cancer cells or inhibit tumor growth and is widely employed in clinical practice. However, while targeting malignant cells, radiation can also cause unintended damage to surrounding healthy tissues, leading to serious complications that adversely affect patient prognosis and quality of life. In recent years, hydrogels have emerged as promising adjuvant systems for RT due to their tunable physicochemical properties, excellent biocompatibility, and capacity for multifunctional integration. This review systematically summarizes recent advances in hydrogel-based platforms designed for radiation protection and therapy enhancement, focusing on how material composition and morphological design enable localized modulation of radiation dose, proactive prevention of side effects, and coordinated intervention in the tumor microenvironment. The review aims to provide a comprehensive resource for understanding the multifunctional roles of hydrogels in RT and to explore their potential pathways toward clinical translation, with the goal of advancing precise, low-toxicity, and personalized radiotherapy.</div></div>","PeriodicalId":34051,"journal":{"name":"Radiation Medicine and Protection","volume":"7 3","pages":"Pages 160-175"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148214723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of radiation protection status in diagnostic X-ray facilities at four different districts in Bangladesh","authors":"Elias Ahmed ,&nbsp;Md Towhid Hossain ,&nbsp;Rajan Chandra Karmkar ,&nbsp;Biraj Kumer Sarker ,&nbsp;Md Masudul Kabir ,&nbsp;Md Rafiqul Islam ,&nbsp;Md Akramuzzaman","doi":"10.1016/j.radmp.2026.04.006","DOIUrl":"10.1016/j.radmp.2026.04.006","url":null,"abstract":"<div><h3>Objective</h3><div>To evaluate the radiation protection status and regulatory compliance for radiological diagnostic facilities in Bangladesh.</div></div><div><h3>Methods</h3><div>A total of 153 diagnostic X-ray facilities were selected from four different districts (Chandpur, Dinajpur, Pirojpur, and Tangail) of Bangladesh, to assess the detailed radiation safety infrastructure and verify the regulatory compliance (BAER Act-2012, NSRC Rules-1997, and Regulatory Guides) using standard checklist and radiation measuring device.</div></div><div><h3>Results</h3><div>The results show that 71% facilities are licensed, 66% have certified radiation control officers (RCOs), 93% possesses personal protective equipment, 78% have appointed qualified radiation workers, 79% workers have personal dosimeters, and near 92% have the required wall thickness in the X-ray room. Proper shielding is observed at 73% entrance doors and in 76% control rooms. The shortcomings are found in the standard room size requirement (25%) and the presence of warning signs (29%). Radiation dose rates in the control room are within the permissible limit in most facilities (72%), but not satisfactory at the entrance door (22%). Chandpur district has a better radiation safety structure than the other three districts, where Pirojpur district stands in the bottom position. Facilities that have a CT scan with a conventional X-ray show better compliance compared to only conventional X-ray and dental X-ray facilities.</div></div><div><h3>Conclusions</h3><div>Comparative study with the regulatory survey, which was conducted in 2000, demonstrates significant improvements in radiation safety infrastructure in these districts. These findings represent significant progress and also highlight gaps in the radiation safety structure in rural areas of the country. The Regulatory Authority should focus on improvement in the areas lacking to ensure a proper radiation safety structure in Bangladesh.</div></div>","PeriodicalId":34051,"journal":{"name":"Radiation Medicine and Protection","volume":"7 3","pages":"Pages 151-159"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148214722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}