Radiation protection dosimetry最新文献_第4页

The reformulated unified interaction model: simulations of linear/supralinear dose reponse in LiF:Mg,Ti, dose threshold for appearance of supralinearity and deviations from linearity in the dose range 0.1-10 Gy. 重新制定的统一相互作用模型：模拟LiF:Mg，Ti的线性/超线性剂量反应，0.1-10 Gy剂量范围内出现超线性和偏离线性的剂量阈值。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-06-05 DOI: 10.1093/rpd/ncaf058

Dmitry Nemirovsky, Leonid Oster, Yigal S Horowitz, Galina Reshes, Shlomo Biderman, Ilan Eliyahu, Hezy Einav, Beny Herman, Alex Shapiro

引用次数: 0

Numerical simulation study of power-frequency exposure to driving windings of electromagnetic suspension high-speed maglev trains. 电磁悬浮高速磁悬浮列车驱动绕组工频暴露数值模拟研究。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-06-05 DOI: 10.1093/rpd/ncaf017

Qiangqiang Pan, Mai Lu

{"title":"Numerical simulation study of power-frequency exposure to driving windings of electromagnetic suspension high-speed maglev trains.","authors":"Qiangqiang Pan, Mai Lu","doi":"10.1093/rpd/ncaf017","DOIUrl":"10.1093/rpd/ncaf017","url":null,"abstract":"As a potential mode of future passenger transport, the electromagnetic environment inside maglev trains is directly related to the safety and health of passengers. To study the electromagnetic exposure risk within the maglev train compartment, numerical models were established in this paper for the maglev track's long stator three-phase drive windings (serving as radiation sources), as well as for the train body and simplistic human body models representing passengers. The exposure levels of 50 Hz three-phase symmetrical current electromagnetic fields (EMFs) were numerically calculated for passengers positioned within the carriage. The numerical simulations focused on passengers' electromagnetic exposure resulting from the leakage of 50 Hz EMFs within the carriage and compared the results with established electromagnetic exposure limit guidelines. The findings indicated that the long stator three-phase drive windings generate electromagnetic leakage within the carriage, especially near the windows. Electromagnetic exposure levels vary, with passengers close to the windows experiencing more pronounced effects. Within the carriage, the maximum values of magnetic flux density (|B|) and induced electric field strength (|E|) for passengers' heads are ⁓0.59 μT and 337 μV/m, respectively. For passengers' torsos, the maximum values are ⁓1.53 μT for |B| and 57.8 μV/m for |E|. Passengers seated near the window exhibit higher values of |E| for their heads and higher values of |B| for their torsos. However, all of these values are well below the electromagnetic exposure limits (50 Hz) set by the International Commission on Non-Ionizing Radiation Protection. These findings provide valuable reference data for studying extremely low-frequency EMF exposure dosimetry in electromagnetic suspension high-speed maglev train systems.","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"552-567"},"PeriodicalIF":0.8,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144094568","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

An approach for annual analysis of EMF exposure in highly sensitive areas of kindergartens and schools. 幼稚园及学校高敏感地区电磁场暴露的年度分析方法。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-06-05 DOI: 10.1093/rpd/ncaf047

Dragan Kljajic, Nikola Djuric, Nicola Pasquino, Nunzia Solmonte, Snezana Djuric

{"title":"An approach for annual analysis of EMF exposure in highly sensitive areas of kindergartens and schools.","authors":"Dragan Kljajic, Nikola Djuric, Nicola Pasquino, Nunzia Solmonte, Snezana Djuric","doi":"10.1093/rpd/ncaf047","DOIUrl":"10.1093/rpd/ncaf047","url":null,"abstract":"Continuous increase of electromagnetic field (EMF) emission in the environment causes worldwide research on various short- and long-term EMF measurements and exposure assessments. Measurements are usually performed in sensitive areas, with conventional measuring approaches and worst-case exposure assessments, which are unable to provide any deeper EMF behavior analyses. Therefore, this paper brings an innovative EMF exposure analysis approach, based on time-averaging of time series data, disclosing some concealed information on long-term exposure. The averaging was done on the set of EMF time series acquired by three sensors in the EMF Regulatory Agency for Electronic Communications and Postal Services (RATEL) monitoring network. Sensors are installed at extremely sensitive locations-on buildings of two kindergartens and an elementary school. Analyses revealed patterns of daily/weekly exposure changes and their differences between working days and weekends, as well as annual decrease/increase, at each location. Comparative analysis among locations showed differences in exposure behavior regarding its peaks, slopes of the decrease/increase, and time intervals of the day with higher exposure.","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"577-588"},"PeriodicalIF":0.8,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144094266","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

Dose coefficients of ICRP adult reference voxel phantom for internal dosimetry of selected radiopharmaceuticals using Geant4/GATE simulation. 使用Geant4/GATE模拟选定放射性药物内剂量测定的ICRP成人参考体素幻影剂量系数。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-05-27 DOI: 10.1093/rpd/ncaf048

S Kaddouch, N El Khayati

引用次数: 0

Recalculation of scatter fractions for homogeneous and heterogeneous geometries using Geant4 Monte Carlo simulations. 使用Geant4蒙特卡罗模拟重新计算均匀和非均匀几何的散射分数。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-05-27 DOI: 10.1093/rpd/ncaf050

Syed Abdul Haseeb Ahmad, Syed Bilal Ahmad, Zain Ul Abidin, Nosheen Faiz, Iftikhar Ahmad

引用次数: 0

Optimization study on neutron/γ radiation-protective clothing materials with computational human phantoms. 具有计算人体模型的中子/γ辐射防护服材料优化研究。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-05-27 DOI: 10.1093/rpd/ncaf010

Shuiyin Qu, Rui Qiu, Shuchang Yan, Jian Huang, Yuqing Niu, Junli Li

{"title":"Optimization study on neutron/γ radiation-protective clothing materials with computational human phantoms.","authors":"Shuiyin Qu, Rui Qiu, Shuchang Yan, Jian Huang, Yuqing Niu, Junli Li","doi":"10.1093/rpd/ncaf010","DOIUrl":"10.1093/rpd/ncaf010","url":null,"abstract":"The applications of nuclear science and technology in both production and daily life are becoming increasingly widespread. Radiation shielding, as a critical component, ensures environmental safety and protects human health. In this study, 20 shielding schemes were designed using ethylene-propylene diene monomer as the base material. These schemes incorporated various proportions of boron carbide and gadolinium oxide as neutron-absorbing components and tungsten as the gamma-shielding component. Based on the Chinese reference adult male (CRAM) voxel model and using an anterior-posterior (AP) irradiation setup, the Monte Carlo method was employed to calculate 28 organ/tissue doses and effective dose reductions from neutron and gamma radiation across the 20 material compositions. Each case was evaluated at three different thicknesses-1, 3, and 5 mm-with Monte Carlo calculation errors controlled within 1%. Results indicated that, for any composite shielding material, the 5-mm thickness provided optimal protection. When an unmoderated and unthermalized 252Cf neutron source was used, effective dose reductions ranged from 32.60% to 38.75% compared to the unshielded case. With a monoenergetic neutron source at 1 keV, the reduction range was between 57.62% and 69.42%. The trend in changes for different composite shielding materials under neutron sources at different energy levels is consistent. When 137Cs served as the gamma source, effective dose reductions ranged from 7.96% to 20.97%, demonstrating that the composite materials offer substantial protection for both neutron and gamma radiation. Additionally, it was found that organs partially exposed outside the shielding material experienced a slight increase in dose due to neutron scattering. In practical applications, full-body protection should be implemented to mitigate this issue.","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"501-510"},"PeriodicalIF":0.8,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144036649","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

Characteristics of 7Be and 210Pb behavior in the atmosphere over Osaka, Japan, as well as the size distributions of the chemical compositions of aerosols attached by 7Be and 210Pb. 日本大阪地区大气中7Be和210Pb的行为特征及7Be和210Pb附着气溶胶化学成分的大小分布

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-05-27 DOI: 10.1093/rpd/ncaf033

Kanyanan Kosinarkaranun, Chonlada Pitakchaianan, Pantiwa Kumsut, Ryuta Hazama, Tatsuhide Hamasaki, Anawat Rittirong, Hisakazu Muramatsu, Pannipa Noithong

{"title":"Characteristics of 7Be and 210Pb behavior in the atmosphere over Osaka, Japan, as well as the size distributions of the chemical compositions of aerosols attached by 7Be and 210Pb.","authors":"Kanyanan Kosinarkaranun, Chonlada Pitakchaianan, Pantiwa Kumsut, Ryuta Hazama, Tatsuhide Hamasaki, Anawat Rittirong, Hisakazu Muramatsu, Pannipa Noithong","doi":"10.1093/rpd/ncaf033","DOIUrl":"10.1093/rpd/ncaf033","url":null,"abstract":"Air pollution, particularly particulate matter 2.5, is a significant environmental concern in Southeast Asia, with adverse effects on human health. Major sources include vehicular emissions, industrial activities, agricultural burning, and transboundary haze. 7Be and 210Pb are tracers for studying aerosol behavior. Aerosol samples were collected using a high-volume air sampler, cascade impactor, and rainwater from the rooftop of Building No.16 (34.71° N, 135.64° E) at Osaka Sangyo University. Results showed that 7Be and 210Pb-carrying aerosols were mainly attached to aerosols smaller than 2 μm, peaking at 0.33-0.55 μm. This study reports the world's first simultaneous measurement of the activity size distribution of 7Be and 210Pb-carrying aerosols across the entire aerosol particle size range, including the smallest sizes. A strong correlation between 7Be and SO42- concentration and between 210Pb and SO42- concentration in summer 2020 suggests SO42-as their carrier. These findings improve understanding of atmospheric transport models and support air pollution mitigation strategies.","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"475-481"},"PeriodicalIF":0.8,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143992959","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

Three-dimensional localization and radioactivity quantification of radiation sources through inverse estimation based on Compton camera measurements. 基于康普顿相机测量的逆估计辐射源的三维定位和放射性量化。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-05-27 DOI: 10.1093/rpd/ncaf046

Yuki Sato

引用次数: 0

Dose calculation in nuclear medicine with magnetic resonance imaging images using Monte Carlo method. 用蒙特卡罗方法计算核医学磁共振成像图像中的剂量。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-05-27 DOI: 10.1093/rpd/ncaf043

Le Huy Vu, Nguyen Thi Phuong Thao, Nguyen Thien Trung, Pham Vo Trung Hau, Truong Thi Hong Loan

引用次数: 0

Evaluation of occupational radiation exposure and influencing factors for healthcare workers during diagnostic computed tomography imaging. 诊断性计算机断层成像过程中卫生保健工作者职业辐射暴露及其影响因素的评价。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-05-27 DOI: 10.1093/rpd/ncaf049

Keisuke Nagamoto, Tomonori Kawachino, Yoshiki Suetsugu, Reika Urasaki, Saki Tokumoto, Masaoki Kohzaki, Shun-Ichi Nihei, Ryuji Okazaki

{"title":"Evaluation of occupational radiation exposure and influencing factors for healthcare workers during diagnostic computed tomography imaging.","authors":"Keisuke Nagamoto, Tomonori Kawachino, Yoshiki Suetsugu, Reika Urasaki, Saki Tokumoto, Masaoki Kohzaki, Shun-Ichi Nihei, Ryuji Okazaki","doi":"10.1093/rpd/ncaf049","DOIUrl":"10.1093/rpd/ncaf049","url":null,"abstract":"This study aimed to identify factors that increase radiation dose to computed tomography (CT) imaging assistants and to propose measures to minimize their effective dose, thereby improving radiation safety. Nine healthcare professionals (five intensivists and four radiological technologists) had their Hp(10) measured during 112 diagnostic CT procedures involving tasks categorized by proximity to the gantry: gantry proximal (e.g. bag-valve-mask (BVM) ventilation) and gantry distal (e.g. patient observation). Multiple regression analysis identified dose-length product (DLP) and tube current as significant predictors of effective dose of CT imaging assistants. The highest effective dose, 26 μSv, occurred during gantry proximal tasks. Intensivists received higher effective doses (35 μSv) than radiological technologists (19 μSv) because the CT imaging procedures they assisted with had higher DLP values. To reduce the effective dose, it is recommended to implement low-dose imaging protocols, optimize imaging coverage, and use radiation protection clothing, such as lead aprons, which significantly reduce Hp(10).","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"522-531"},"PeriodicalIF":0.8,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144044775","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