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Development and performance evaluation of portable thyroid monitor for in vivo monitoring of 131I. 便携式甲状腺131I体内监测监测仪的研制及性能评价。
IF 0.7 4区 环境科学与生态学
Radiation protection dosimetry Pub Date : 2025-07-30 DOI: 10.1093/rpd/ncaf084
Rajesh Sankhla, P Prathibha, Pramilla D Sawant, M S Kulkarni, Probal Chaudhury
{"title":"Development and performance evaluation of portable thyroid monitor for in vivo monitoring of 131I.","authors":"Rajesh Sankhla, P Prathibha, Pramilla D Sawant, M S Kulkarni, Probal Chaudhury","doi":"10.1093/rpd/ncaf084","DOIUrl":"10.1093/rpd/ncaf084","url":null,"abstract":"<p><p>A compact, portable, and tabletop thyroid monitor has been developed for in vivo measurement of 131I activity in the thyroid. This system is designed for use in laboratory settings for monitoring of occupational workers and is also suitable for onsite deployment by radiological emergency response teams during radiation emergency situations for thyroidal measurement of the general public. The monitor incorporates a 51 mm diameter × 51 mm-thick NaI(Tl) scintillation detector coupled with a standalone 1 K multi-channel analyzer, housed within a shielded collimator. The system allows for variable counting geometries, accommodating diverse measurement requirements. Key design elements include a vertical movement system, a chin rest, a calibrated neck-to-collimator distance scale, and an Light Emitting Diode-based alignment indicator to ensure precise positioning of the thyroid relative to the detector. A specialized software has been developed for the quantification of thyroidal 131I activity, intake estimation, and committed effective dose calculation. Under normal radiation background conditions (~70 nSv/h), the system achieves a minimum detectable activity of 60 Bq with a 5-min counting time. The monitor is capable of accurately assessing thyroid equivalent doses below 50 mSv, even under conditions of elevated environmental radiation following radiation emergency situations. This system enhances rapid and in situ thyroidal 131I monitoring, supporting radiation protection efforts in both routine monitoring and emergency response scenarios.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"762-774"},"PeriodicalIF":0.7,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144643257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparison of knowledge and concerns about radiation between the general population and radiological technologists using a fact-finding survey. 使用事实调查比较普通人群和放射技术人员对辐射的知识和关注。
IF 0.7 4区 环境科学与生态学
Radiation protection dosimetry Pub Date : 2025-07-30 DOI: 10.1093/rpd/ncaf082
Kako Ohshima, Kaita Nakao, Rika Morooka, Satoshi Takeda, Yoshiya Fukamizu, Nanako Ueshima, Syo Murata, Junichi Kaneko, Tomohiro Arai
{"title":"Comparison of knowledge and concerns about radiation between the general population and radiological technologists using a fact-finding survey.","authors":"Kako Ohshima, Kaita Nakao, Rika Morooka, Satoshi Takeda, Yoshiya Fukamizu, Nanako Ueshima, Syo Murata, Junichi Kaneko, Tomohiro Arai","doi":"10.1093/rpd/ncaf082","DOIUrl":"10.1093/rpd/ncaf082","url":null,"abstract":"<p><p>We conducted an online survey of 1953 members of the general population (valid response rate: 65.1%) and 384 radiological technologists (valid response rate: 100%) to examine the relationship between radiation knowledge and concerns. The mean knowledge score (maximum: 50) was 28.7 in the general population and 40.2 among radiological technologists. The mean concern scores (maximum: 50) were 25.0 and 17.1, respectively. Both scores differed significantly between the groups (Mann-Whitney U test, P < .01). In the general population, the relationship between knowledge and concern scores varied according to age. In those aged < 30 years, the correlation was weak (R, -0.411 to -0.412), whereas in those aged ≥ 30 years, it was stronger (R, -0.541 to -0.546), suggesting that knowledge reduces concerns. No significant age-based differences were observed among the technologists. These findings suggest that increasing knowledge about radiation may help alleviate concerns.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"753-761"},"PeriodicalIF":0.7,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144643256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Faecal excretion of thorium by NORM workers. NORM工人粪便中钍的排泄。
IF 0.7 4区 环境科学与生态学
Radiation protection dosimetry Pub Date : 2025-07-30 DOI: 10.1093/rpd/ncaf081
Gregory S Hewson, Martin Ralph, Marcus Cattani
{"title":"Faecal excretion of thorium by NORM workers.","authors":"Gregory S Hewson, Martin Ralph, Marcus Cattani","doi":"10.1093/rpd/ncaf081","DOIUrl":"10.1093/rpd/ncaf081","url":null,"abstract":"<p><p>Exposure to thorium-bearing dust in industries handling and processing monazite and other minerals can pose radiological risks to workers. This study aimed to reassess historical faecal bioassay data collected over 10 d from two monazite plant workers using updated biokinetic and dosimetric models. Another objective was to evaluate the feasibility of faecal thorium bioassay for contemporary operations involving naturally occurring radioactive materials (NORM). The retrospective analysis found that the bioassay-derived thorium intakes were significantly higher than those estimated via personal air sampling. The effective dose estimates for the two workers were similar and ranged from 0.95 to 2.40 mSv over the 5-d exposure period, depending on the worker's assumed mode of breathing. The study confirmed that faecal thorium bioassay remains a viable tool for monitoring workers exposed to insoluble thorium dust, but the timing of sample collection, individual physiology, and background dietary intake of NORM must be considered.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"786-794"},"PeriodicalIF":0.7,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12311421/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144643258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Machine learning-based estimation of occupational radiation dose in interventional cardiology. 基于机器学习的介入心脏病学职业辐射剂量估计。
IF 0.8 4区 环境科学与生态学
Radiation protection dosimetry Pub Date : 2025-07-24 DOI: 10.1093/rpd/ncaf064
Kevser A Hışıroğlu, Ozan Toker, Melis T Özşahin, Orhan İçelli
{"title":"Machine learning-based estimation of occupational radiation dose in interventional cardiology.","authors":"Kevser A Hışıroğlu, Ozan Toker, Melis T Özşahin, Orhan İçelli","doi":"10.1093/rpd/ncaf064","DOIUrl":"10.1093/rpd/ncaf064","url":null,"abstract":"<p><p>In interventional cardiology, occupational radiation exposure for medical personnel can reach high levels, underscoring the critical need for effective radiation protection and monitoring methods. This study employs machine learning algorithms to estimate radiation doses received by personnel within a virtual 3D angiography room designed to reflect realistic clinical settings. Monte Carlo simulations generated radiation data across various scenarios, accounting for personnel positions, radiation source distance, and exposure angles typical in angiography. The simulation data were used to train five machine-learning algorithms (Gradient Boosting, K-nearest neighbors, Random Forest, Linear Regression, and Decision Tree). Key findings showed that machine learning models, particularly Gradient Boosting, could effectively predict dose levels by utilizing spatial and operational parameters without requiring physical dosemeter. This study provides a framework that could streamline radiation monitoring practices, making dose assessments more accessible and efficient for routine use in clinical environments.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"690-700"},"PeriodicalIF":0.8,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144512420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimizing patient and staff radiation exposure in interventional cardiology: how to achieve it. 介入心脏病学中优化患者和工作人员的辐射暴露：如何实现。
IF 0.8 4区 环境科学与生态学
Radiation protection dosimetry Pub Date : 2025-07-24 DOI: 10.1093/rpd/ncaf069
Federica Zanca, Celine Collard, Michel Henry, Emmanuel Rombaut, Sonia Sghaier, Justine Massart, Pierre-Emmanuel Massart
{"title":"Optimizing patient and staff radiation exposure in interventional cardiology: how to achieve it.","authors":"Federica Zanca, Celine Collard, Michel Henry, Emmanuel Rombaut, Sonia Sghaier, Justine Massart, Pierre-Emmanuel Massart","doi":"10.1093/rpd/ncaf069","DOIUrl":"10.1093/rpd/ncaf069","url":null,"abstract":"<p><p>Radiation exposure is a primary concern during interventional cardiology procedures. This study evaluates the impact on patient and operator radiation exposure of implementing modern shielding, innovative imaging technologies and optimized protocols, combined with staff education. Radiation exposure data during coronary angiography (CA) and percutaneous coronary intervention (PCI) procedures were analyzed in three cohorts: use of historical imaging protocols and conventional operator shielding (P0); introduction of a suspended operator radiation protection system (P1); implementation of innovative imaging chain and optimized protocols (P2). Patient radiation levels between P0 and P2 were significantly reduced by up to 44% for CA procedures and up to 74% for PCI procedures. Operator doses showed a reduction of 86% and 93% for CA and PCI, respectively. Compared to literature, our patient dose levels were among the lowest, with values well below current European dose reference levels.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"709-719"},"PeriodicalIF":0.8,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144592050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Small-field measurements in 3D polymer gel dosimetry using optical computed tomography. 光学计算机断层扫描在三维聚合物凝胶剂量测定中的小场测量。
IF 0.7 4区 环境科学与生态学
Radiation protection dosimetry Pub Date : 2025-07-24 DOI: 10.1093/rpd/ncaf066
Hiraku Kawamura, Yoshitomo Araki, Yuichi Sato, Masumi Uehara
{"title":"Small-field measurements in 3D polymer gel dosimetry using optical computed tomography.","authors":"Hiraku Kawamura, Yoshitomo Araki, Yuichi Sato, Masumi Uehara","doi":"10.1093/rpd/ncaf066","DOIUrl":"10.1093/rpd/ncaf066","url":null,"abstract":"<p><p>Polymer gel dosimetry enables three-dimensional measurements. We measured the dose-response characteristics using an optical computed tomography (CT) system and evaluated the scatter correction for polymer gel-optical CT to calculate accurate field output factors. The dose-response can be expressed using an appropriate fitting model in the range of 0-10 Gy. The irradiated four-finger gel phantom with four collimators of different diameters was scanned using optical CT. The corrected optical CT image showed an improved low-intensity signal near the edge closer to the film, resulting in the profile. The field output factors in the 5 mm diameter small irradiation field were calculated using a gel dosemeter-optical CT system and compared with those from several ionization chambers. The polymer gel-optical CT system is suitable for calculating field output factors in small-field measurements.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"742-751"},"PeriodicalIF":0.7,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144529414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Performance of personal dosimetry systems in India: insights from EURADOS interlaboratory comparison exercises IC2022ph and IC2022n. 印度个人剂量测定系统的性能：来自EURADOS实验室间比较练习IC2022ph和IC2022n的见解
IF 0.8 4区 环境科学与生态学
Radiation protection dosimetry Pub Date : 2025-07-24 DOI: 10.1093/rpd/ncaf074
Suresh M Pradhan, Madhumita Bhattacharya, Munir S Pathan, Rupali Pal, Sandipan Dawn, Kshama Srivastava, Ashok K Bakshi, T Palani Selvam, Balvinder K Sapra
{"title":"Performance of personal dosimetry systems in India: insights from EURADOS interlaboratory comparison exercises IC2022ph and IC2022n.","authors":"Suresh M Pradhan, Madhumita Bhattacharya, Munir S Pathan, Rupali Pal, Sandipan Dawn, Kshama Srivastava, Ashok K Bakshi, T Palani Selvam, Balvinder K Sapra","doi":"10.1093/rpd/ncaf074","DOIUrl":"10.1093/rpd/ncaf074","url":null,"abstract":"<p><p>Bhabha Atomic Research Centre participated in the EURADOS Inter-comparison Exercises IC2022ph [Hp(10) and Hp(0.07)] and IC2022n [Hp(10] for assessment of external exposures, using the CaSO4:Dy-based thermoluminescent dosemeter (TLD) (indigenously developed) for photon and beta radiations and etched track neutron dosemeter, respectively. The performance of TLD personnel dosimetry system, assessed in accordance with ISO 14146:2018 and ANSI N13-11.2009 standards, is satisfactory. The results of the IC2022ph have enhanced confidence in the accuracy and reliability of the Hp(10) and Hp(0.07) algorithms used for TLD badge. Dose evaluation for the neutron dosimetry system was based on in-house developed imaging system. The performance of neutron dosemeter system, as assessed in this interlaboratory comparison, indicates a need to improve the quality of the detector material. Participation in the inter-comparison exercises underscores the reliability of dosimetry systems and highlights their effectiveness in accurately assessing external radiation exposures in India's personnel monitoring programs.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"720-731"},"PeriodicalIF":0.8,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144592051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Correction to: Assessment of radioactivity in soil samples from Wolaita Sodo town, Ethiopia: implications for environmental and public health. 更正：对埃塞俄比亚Wolaita Sodo镇土壤样品放射性的评估：对环境和公众健康的影响。
IF 0.7 4区 环境科学与生态学
Radiation protection dosimetry Pub Date : 2025-07-24 DOI: 10.1093/rpd/ncaf087
{"title":"Correction to: Assessment of radioactivity in soil samples from Wolaita Sodo town, Ethiopia: implications for environmental and public health.","authors":"","doi":"10.1093/rpd/ncaf087","DOIUrl":"10.1093/rpd/ncaf087","url":null,"abstract":"","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"752"},"PeriodicalIF":0.7,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12289409/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144609220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Monitoring and analysis of the internal exposure of 131I-treatment workers in Nuclear-Medicine Departments in Jiangsu Province from 2021 to 2023. 2021 - 2023年江苏省核医学部门131i治疗人员内照射监测分析
IF 0.8 4区 环境科学与生态学
Radiation protection dosimetry Pub Date : 2025-07-24 DOI: 10.1093/rpd/ncaf065
Zihao Zhang, Jiayi Ma, Xiaoyong Yang, Xiaodong Shi, Jin Wang
{"title":"Monitoring and analysis of the internal exposure of 131I-treatment workers in Nuclear-Medicine Departments in Jiangsu Province from 2021 to 2023.","authors":"Zihao Zhang, Jiayi Ma, Xiaoyong Yang, Xiaodong Shi, Jin Wang","doi":"10.1093/rpd/ncaf065","DOIUrl":"10.1093/rpd/ncaf065","url":null,"abstract":"<p><p>Herein, we analyze the dose distribution and factors influencing the occupational internal irradiation exposure to iodine-131 (131I) for nuclear-medicine staff in Jiangsu Province. A total of 472 individuals in 56 hospitals were monitored during the three-year monitoring period, and 131I was detected in 170 of them. The highest thyroid activity level detected across all cases was 24.83 kBq, with the average thyroid activity being 130.3 Bq. The average annual dose of irradiated staff members was 0.339 mSv. The primary factors related to the detection rate of 131I in the irradiated staff members were their work position, their location, the operation of an automatic dispenser, and their weekly working hours. Internal exposure thus requires due attention, and further effective monitoring of internal exposure should be conducted for all such staff members.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"683-689"},"PeriodicalIF":0.8,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144302725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of elevation on cumulative radiofrequency exposure from multiple communication towers. 海拔高度对来自多个通信塔的累积射频暴露的影响。
IF 0.8 4区 环境科学与生态学
Radiation protection dosimetry Pub Date : 2025-07-24 DOI: 10.1093/rpd/ncaf068
Samuel Osei, Emmanuel Quarshie, Collins Kafui Azah, Abdul-Razak Fuseini, Richard Dogbey, Philip Deatanyah, Godfred Bright Hagan, Joanna Aba Modupeh Hodasi, Frederick Sam, Joseph Kwabena Amoako
{"title":"Effect of elevation on cumulative radiofrequency exposure from multiple communication towers.","authors":"Samuel Osei, Emmanuel Quarshie, Collins Kafui Azah, Abdul-Razak Fuseini, Richard Dogbey, Philip Deatanyah, Godfred Bright Hagan, Joanna Aba Modupeh Hodasi, Frederick Sam, Joseph Kwabena Amoako","doi":"10.1093/rpd/ncaf068","DOIUrl":"10.1093/rpd/ncaf068","url":null,"abstract":"<p><p>A densely populated place like a public university needs good internet and communication connectivity for effective academic work. As such, University campuses in Ghana are inundated with communication antennas. This study investigated how radiofrequency (RF) power density levels are affected by the elevations of different floors of high-rise buildings of a public university. A spectrum analyser coupled to a log-periodic antenna was used. The RF power density decreased from the ground floor to the third floor and only increased to maximum levels on the fourth floor. The variation across different floors indicates the influence of elevation on the measured EMF levels. The 900 MHz band produced the highest power density of 1.16E-03 W/m2 on the last (fourth) floor, suggesting that communication applications in the 900 MHz band are the most used by the university community.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"701-708"},"PeriodicalIF":0.8,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144529413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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