Radiation protection dosimetry最新文献

{"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}

{"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}

{"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}

{"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}

{"title":"Biological-physical model of human glioma cells based on microdosimetry.","authors":"Yunan Gao, Yongkang Zhou, Yuan Zhuang, Xuan Ding, Yixing Chen, Shisuo Du","doi":"10.1093/rpd/ncaf071","DOIUrl":"10.1093/rpd/ncaf071","url":null,"abstract":"<p><p>Cells are the most basic units in organisms. Due to the randomness of the interaction between radiation and matter, the statistical fluctuations in cell doses further confirmed the sensitivity of microscopic energy deposition to the volume and shape of subcellular level targets (Palmer TL, Tkacz-Stachowska K, Skartlien R. et al. Microdosimetry modeling with auger emitters in generalized cell geometry. Phys Med Biol 2021;66:115023. 10.1088/1361-6560/ac01f5). When X-rays interact with glioma cells, their physical and biological processes become more complex. The purpose of this study was to use glioma cells in combination with radiation physics technology and biological experimental technology to explore the construction of a biophysical cell model for the mechanisms of radiotherapy and its biological effects. The main work of this study was to apply the theory of radiation dosimetry, combined with advanced image analysis and numerical analysis techniques, to construct a curved surface model of real glioma cells and to carry out Monte Carlo simulation and radiobiology experiments. Comparative experimental results in radiation physics and radiobiology were obtained. The dose estimation results of the glioma cell curved surface model proposed in this paper show that the dose deposited in the nucleus of a single glioma nucleus after X-ray irradiation is ~70% of the external radiation dose, and the dose score of the community cells shows a Gaussian distribution, consistent with the randomness of dose deposition. The radiobiological results showed that cell injury increased with increasing dose, and the apoptosis rate peaked at 48 h and decreased gradually under 2 Gy irradiation. The T98G cell biophysical model has important application value in dose estimation and radiobiological effect research and can provide detailed dose information simulation to provide theoretical and application support for tumour radiotherapy.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"732-741"},"PeriodicalIF":0.8,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144609219","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}

{"title":"Comprehensive investigation of radiation protection in veterinary hospitals in Changzhou, China.","authors":"Qiang Wang, Qiang Fu, Sheng Yang","doi":"10.1093/rpd/ncaf075","DOIUrl":"https://doi.org/10.1093/rpd/ncaf075","url":null,"abstract":"&lt;p&gt;&lt;p&gt;To assess the current status of radiation protection in Changzhou veterinary hospitals. Questionnaires were used to survey the veterinary hospitals and their radiation workers, questions included veterinary hospitals' basic information, location, type of X-ray diagnostic equipment, and personal information, status survey, the radiation cognition of the radiation workers. In search of veritable data for the estimation of occupational doses, an AT1123 radiation survey dosemeter was used to simulate the measurement of the ambient dose equivalents around the head and neck of a radiation worker operating in the imaging room. RaySafe RF was used to measure the air kerma at the center of the irradiation field and 0.5 cm from it. RaySafe RF and related phantoms were used for performance tests of X-ray diagnostic equipment. A total of 118 veterinary hospitals, 118 radiation workers, and 119 X-ray diagnostic equipment were surveyed. Among the 119 X-ray diagnostic equipment, 118 were DR (Digital Radiography) for veterinary practice, and 1 was a general-purpose CT scanner. The 118DRs cover 31 brands (manufacturers), the top six brands of DRs accounted for 68% of the total. A portion of the veterinary hospitals did not fully consider radiological protection in site selection (most veterinary hospitals were located near shops or residential areas), imaging room location (only 53 X-ray diagnostic devices are set on the first floor), and imaging room shielding. One hundred and seventeen (98.3%) X-ray diagnostic equipment needs to be operated while the radiation workers stay in the imaging room. Individual monitoring of occupational external exposure was carried out in 117 (99.2%) veterinary hospitals, and 59 (50.0%) did not carry out health surveillance for radiation workers. Twenty three (19.5%) veterinary hospitals placed Thermoluminescent Dosimeter (TLDs) in the imaging room or even next to the X-ray tube. The vast majority of radiation workers manually restrained pets (93.2%) and the majority (84.7%) of radiation workers refused to wear lead gloves during restraints, resulting in occasional exposure of their hands to the primary beam. The performance tests of X-ray diagnostic equipment of six DRs found that DRs of four (66.6%) brands had unqualified indexes, and the main unqualified indexes were the linearity of tube output of two DRs (33.3%) and alignment of X-ray field of three DRs (50.0%). The air kerma in the irradiation field of DRs ranged from 122.3 to 410.4 uGy, and there were obvious differences between the air kerma in the irradiation field and out of it (Z = -5.125， P &lt;.001). The ambient dose equivalents around the head and neck of animal restrainers ranged from 22 to 182 nSv. The site selection of the veterinary hospitals, and the placement of the imaging room are not optimized because of the lack of occupational hazard assessment, the routine performance tests of X-ray diagnostic equipment are not carried out, and the occupational health ex","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144691353","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}

{"title":"Optimizing radiation dose and image quality in neonatal mobile radiography.","authors":"Takahiko Maeda, Makoto Hara, Hiroyuki Yamasaki, Makoto Nakahara, Yoshinori Tanabe","doi":"10.1093/rpd/ncaf080","DOIUrl":"https://doi.org/10.1093/rpd/ncaf080","url":null,"abstract":"<p><p>Children are more susceptible to radiation exposure than adults. Therefore, determining an appropriate radiation dose requires balancing and minimizing radiation exposure while maintaining image quality (IQ) for accurate diagnosis. We evaluated the optimal radiation dose parameters for neonatal chest and abdominal mobile radiography by assessing entrance surface dose and IQ indices. A range of exposure parameters was tested on neonatal and acrylic phantoms, and the optimal settings were determined through visual and physical evaluations. Overall, 65 kVp and 1.2 mAs provided the best balance between minimizing radiation exposure and maintaining high IQ for neonates. This study offers essential insights into optimizing radiographic conditions for neonatal care, contributing to safe and effective radiological practices. These optimized parameters can help guide future clinical applications by ensuring reduced radiation risk and enhanced diagnostic accuracy.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144660039","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}

{"title":"Radiation doses for pediatric cardiac computed tomography angiography: weight-based radiation typical values at a tertiary hospital in southern Thailand.","authors":"Tshering Yangdon, Supika Kritsaneepaiboon, Saowapark Poosiri","doi":"10.1093/rpd/ncaf072","DOIUrl":"https://doi.org/10.1093/rpd/ncaf072","url":null,"abstract":"<p><p>This study determined weight-based median radiation dose levels or typical values as defined by the International Commission on Radiological Protection of pediatric cardiac computed tomography angiography (CTA) in a tertiary hospital. A total of 211 cardiac CTA studies from 194 children (<15 years old) were retrospectively analyzed. The study examinations were organized into categorized base on body weight ranges. The typical values for CTDIvol(mGy) and DLP(mGy.cm) were respectively determined for each weight band as follows: <5 kg(n = 42): 1.02,12.16; 5 ≤ 15 kg(n = 57): 1.42, 25.0; 15 ≤ 30 kg(n = 53): 2.15, 40.94; 30 ≤ 50 kg(n = 26): 3.80, 100.04; and 50 ≤ 80 kg(n = 3): 8.06, 212.23. The overall median (interquartile range) for each CT dose parameter were as follows: E = 1.80 (1.16-2.83) mSv, SSDEDw = 3.23 (2.54-4.78) mGy, SSDEAP = 3.17 (2.51-4.68) mGy, SSDELAT = 3.18 (2.54-4.50) mGy, SSDEAP + LAT = 3.25 (2.60-4.57) mGy, and SSDEEff = 3.21 (2.57-4.55) mGy. Further research is needed to develop local, regional, and national weight-based lifetime attributable risks for cardiac CTA in children.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144660040","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}

{"title":"Analysis of occupational radiation doses in nuclear medicine and radiography students during clinical training.","authors":"George Rouvalis, Pradip Deb, Mohamed Khaldoun Badawy","doi":"10.1093/rpd/ncaf083","DOIUrl":"https://doi.org/10.1093/rpd/ncaf083","url":null,"abstract":"<p><p>An analysis compared the occupational radiation doses received by Nuclear Medicine Technologist (NMT) and radiography students during their clinical training at an Australian University from 2017 to 2020. Utilising Optically Stimulated Luminescence dosemeters to measure the personal dose equivalent, the retrospective cohort included students with dose readings above 100 μSv per monitoring period. Of the total number of students monitored, ~68% received doses below the minimum reportable threshold of 100 μSv per monitoring period, suggesting that most students had minimal exposure during their placements. A chi-square test revealed a significant difference between NMT and radiography students in the proportion of doses below this threshold (Hp(10): χ2(1, N = 1367) = 168.24, P < .001; Hp(0.07): χ2(1, N = 1367) = 139.27, P < .001). Analysing doses above this threshold revealed that NMT students had significantly higher median radiation doses than radiography students, with median Hp(10) doses of 161 μSv versus 130 μSv, respectively (P < .001). Year-to-year analysis indicated that NMT student doses remained stable over the study period, while radiography student doses varied significantly. Comparison with hospital staff doses showed that NMT students received significantly lower doses than professional NMTs (P < .001), whereas radiography students received higher doses than professional radiographers (P < .001). After limiting hospital staff doses to include those only above 100 μSv in a reporting period, radiography students still received higher doses than professional radiographers. The elevated exposure among NMT students compared to radiography students however, emphasizes the need for enhanced radiation protection strategies in nuclear medicine education, emphasising specialized training and regular dose assessments to ensure student safety without compromising educational quality.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144660038","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}

{"title":"Experimental study of dosimetric properties of radiophotoluminescent glass dosemeters using high-energy X-rays.","authors":"Hao Qi, Xiang Du, Sheng-Ri Li, Chunyong Yang, Jin Wang","doi":"10.1093/rpd/ncaf079","DOIUrl":"https://doi.org/10.1093/rpd/ncaf079","url":null,"abstract":"<p><p>This study evaluates the dosimetric performance of GD-302M radiophotoluminescent glass dosemeters (RPLGDs) under high-energy X-rays (6-15 MV) as a potential alternative to thermoluminescent dosemeters for radiotherapy audits in China. Key properties-dose linearity, uniformity, reproducibility, energy response, fading, build-up effects, and signal depletion-were systematically assessed using a medical linear accelerator under reference conditions. The results demonstrated excellent dose linearity (R2 = 0.9987, 1-4 Gy), uniformity (coefficient of variation = 0.9%), and reproducibility (standard deviation = 0.42%). Energy-dependent variations remained within 1.3%, while fading effects showed a cumulative signal loss of 3% over 110 d. Unpreheated RPLGDs retained 98% of preheated signals after 30 d, with minimal signal depletion per readout (0.016%). A water-to-solid phantom conversion coefficient of 0.998 was established. The total experimental uncertainty was 2.4%. These findings validate RPLGDs as a stable, reproducible, and cost-effective tool for enhancing radiotherapy quality assurance in resource-constrained settings.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144626993","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}