Radiation protection dosimetry最新文献_第2页

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 : 2025-06-16 DOI: 10.1093/rpd/ncaf065

Zihao Zhang, Jiayi Ma, Xiaoyong Yang, Xiaodong Shi, Jin Wang

引用次数: 0

Establishing local diagnostic reference levels for adult whole-body PET/CT in Malaysia. 在马来西亚建立成人全身PET/CT的当地诊断参考水平。

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/ncaf053

Abdallah Al Said, Azhar Abdul Rahman, Fatin Nadhirah Binti A Halim, Laith Albadarneh, Ammar A Oglat, H H Saleh, Wesal Shloul, Yahya Alshloul

{"title":"Establishing local diagnostic reference levels for adult whole-body PET/CT in Malaysia.","authors":"Abdallah Al Said, Azhar Abdul Rahman, Fatin Nadhirah Binti A Halim, Laith Albadarneh, Ammar A Oglat, H H Saleh, Wesal Shloul, Yahya Alshloul","doi":"10.1093/rpd/ncaf053","DOIUrl":"10.1093/rpd/ncaf053","url":null,"abstract":"Background: The combination of positron emission tomography (PET) and computed tomography (CT) scanning has significantly transformed the field of nuclear medicine.Purpose: This study aims to establish local diagnostic reference levels (LDRLs) for adult positron emission tomography/computed tomography (PET/CT) scans utilizing three radiotracers:18F-fluorodeoxyglucose (18F-FDG), 68Gallium-prostate-specific-membrane-antigen (68Ga-PSMA), and 68Gallium-etraazacyclododecane-tetraacetic-acid-octreotide (68Ga-DOTATATE).Methods: Demographic data, radiation dose information, scanner PET/CT system specifications, and acquisition protocols were collected from the Department of Nuclear Medicine at Penang Hospital in Malaysia. The LDRL was determined by calculating the 50th percentile.Results: The proposed LDRLs values for whole-body 18F-FDG, 68Ga-PSMA and 68Ga-DOTATATE scans were 264 MBq, 194.07 MBq, and 186.85 MBq, respectively. The proposed LDRL for the diagnostic CT parameters (CTDIvol and DLP) associated with whole-body 18F-FDG PET/CT scans were 4.04 mGy and 412.25 mGy.cm, while proposed LDRL values for 68Ga-PSMA and 68Ga-DOTATATE scans were 4.33 mGy and 452.16 mGy.cm, and 4.51 mGy and 468.69 mGy.cm, respectively.Conclusion: The administered activity of 18F-FDG, 68Ga-PSMA, and 68Ga-DOTATATE examinations can be reduced without compromising or affecting the image quality. The proposed LDRL values for the CT parameters of the whole-body 18F-FDG examinations were the lowest among all compared values, but 68Ga-PSMA and 68Ga-DOTATATE examinations require further studies to optimize patient radiation doses in Malaysia and other regions while maintaining image quality.","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"568-576"},"PeriodicalIF":0.8,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144094346","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

Radiation absorbed dose efficacy of 177Lu-DOTATATE in radionuclide therapy of neuroendocrine tumors: a hybrid study of patient and simulation. 177Lu-DOTATATE在放射性核素治疗神经内分泌肿瘤中的辐射吸收剂量效应：病人与模拟的混合研究。

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/ncaf054

Alireza Seyedabadi, Pejman Porouhan, Hamid-Reza Sadoughi, Ruhollah Ghahramani-Asl

{"title":"Radiation absorbed dose efficacy of 177Lu-DOTATATE in radionuclide therapy of neuroendocrine tumors: a hybrid study of patient and simulation.","authors":"Alireza Seyedabadi, Pejman Porouhan, Hamid-Reza Sadoughi, Ruhollah Ghahramani-Asl","doi":"10.1093/rpd/ncaf054","DOIUrl":"10.1093/rpd/ncaf054","url":null,"abstract":"Recent developments in targeted radiopharmaceuticals offer promising options for diagnosis and treatment by specifically targeting the overexpressed somatostatin receptors in neuroendocrine tumors (NETs). This study aims to assess the radiation absorbed dose efficacy of 177Lu-DOTATATE in radionuclide therapy of NETs. Four patients were selected for imaging using 177Lu-octreotide or DOTATATE via Single photon emission computed tomography/Computed tomography (SPECT/CT). The absorbed doses were calculated employing the Medical Internal Radiation Dose (MIRD) method and S-value tables associated with 177Lu, utilizing the GEANT4 Application for Tomographic Emission (GATE) calculation code. The mean percentage differences in the S-values between the GATE and IDAC2.1 calculation methods were -0.7 for S (Spleen→Spleen), -3.5 for S (Kidneys→Kidneys), and 4.9 for S (Liver→Liver). The mean absorbed doses from the GATE were 0.076, 0.20, 0.29, and 0.47 mGy/MBq for the liver, kidneys, spleen, and tumors, respectively. Assessment of the results obtained from the GATE code as a voxel-level dose calculation tool in non-uniform media showed that 177Lu-DOTATATE may provide beneficial therapeutic effects.","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"602-611"},"PeriodicalIF":0.8,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144128460","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

A preliminary study on the environmental monitoring, and estimation of the environmental dose in a high natural background radiation area of Ramsar, Iran. 伊朗拉姆萨尔高自然本底辐射区环境监测和环境剂量估计的初步研究。

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/ncaf051

Sedigheh Sina, Mehrnoosh Karimipourfard, Fatemeh Lotfalizadeh, Zahra Rakeb, Fatemeh N Alizadeh, Amirali Falakian

{"title":"A preliminary study on the environmental monitoring, and estimation of the environmental dose in a high natural background radiation area of Ramsar, Iran.","authors":"Sedigheh Sina, Mehrnoosh Karimipourfard, Fatemeh Lotfalizadeh, Zahra Rakeb, Fatemeh N Alizadeh, Amirali Falakian","doi":"10.1093/rpd/ncaf051","DOIUrl":"10.1093/rpd/ncaf051","url":null,"abstract":"High natural background radiation areas (HNBRAs) worldwide contribute additional radiation doses to humans, plants, and land animals. Among these regions, Talesh Mahalleh in Ramsar, Iran, is notable for having the highest levels of natural background radiation in the world. This study aimed to assess the natural radioactivity in this region. The study was performed in three phases: (i) analyzing the activity concentrations of radioactive elements in samples of soil, water, and plants, collected from various parts of Talesh Mahalleh, by gamma spectroscopy using a high-purity germanium detector. (ii) Measurement of the environmental radiation doses in different locations of the high background area using thermoluminescence dosimetry (TLD), for 2 months. (iii) The environmental radiation monitoring using a calibrated survey meter. The concentrations of natural radioactive materials, like Ra-226, Th-232, and K-40 activity were measured in soil, water, and plants. Based on the results, the maximum concentration of Ra-226 in the soil samples prepared from Talesh Mahalleh was found to be 16 687 Bq/kg. The survey meter indicated the dose rates of 2.51 to 8.43 μSv/h in the high background area of Talesh Mahalleh, which is much higher than the average natural background in the world. The results of TLD are in consistent with the online environmental monitoring. This preliminary research highlights the critical need for further studies on the measurement of external and internal dosimetry for terrestrial animals of this HNBRA.","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"541-551"},"PeriodicalIF":0.8,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144094357","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

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