Radiation protection dosimetry最新文献

{"title":"Investigation of fetal exposure to electromagnetic waves between 2.45 and 5 GHz during pregnancy.","authors":"Niyazi İl, Kayhan Ateş, Şükrü Özen","doi":"10.1093/rpd/ncaf110","DOIUrl":"https://doi.org/10.1093/rpd/ncaf110","url":null,"abstract":"<p><p>In this paper, we have assessed the specific absorption rate (SAR) in fetal brain and lungs during the second trimester of pregnancy conditions of body exposure to radiofrequency electromagnetic field (RF-EMF). SAR calculations were performed for frontal and lateral incidences, with both vertical and horizontal polarization of the incident electromagnetic (EM) waves at frequencies ranging from 2.45 to 5 GHz. A realistic pregnant human model with a belly button piercing was implemented for numerical simulation for nonionizing dosimetry. The simulation results reveal that SAR tends to rise in the presence of belly-button piercing. The highest SAR10g recorded on the fetus's lungs was 16 mW/kg at a frequency of 2.45 GHz. Similarly, the maximum SAR10g value on the fetus's brain was measured 14 mW/kg, occurring at a frequency of 2.45 GHz. Results indicate that metal objects can lead to an increase in SAR values. However, obtained values remain below limits set by international organizations like the Institute of Electrical and Electronics Engineers and the International Commission on Non-Ionizing Radiation Protection.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145138538","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":"Computed tomography dose management practices and the adoption of automated dose monitoring tools in Australia: a national survey.","authors":"Mohammed Alanazi, Peter Kench, Seyedamir Tavakoli-Taba, Ernest Ekpo","doi":"10.1093/rpd/ncaf109","DOIUrl":"https://doi.org/10.1093/rpd/ncaf109","url":null,"abstract":"<p><p>This study investigates computed tomography (CT) dose management and automatic dose monitoring software (DMS) use in Australian radiology departments. An online survey covering departmental characteristics, dose management practices, DMS usage, and radiation protection activities was distributed through national radiation organisations and social media. Of the 132 initial responses received, 45 were eligible, completed, and analysed. The findings indicate 91% (n = 41/45) of departments regularly assess CT doses, with 63% (n = 26/41) conducting such assessments only once a year. Automatic DMS tools were utilised by 41% (n = 17/41) of these departments for CT dose data collection and analysis, while 59% (n = 24/41) relied on traditional methods. Only 25% (n = 6/24) of non-DMS users indicated plans for future adoption. A radiation protection team was present in 41% (n = 17/41) of departments. While dose assessment is commonly practised, it mostly relies on manual methods and is performed infrequently. Broader DMS implementation and formal radiation protection teams are recommended to strengthen CT dose management and enable continuous monitoring.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145126136","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":"Activity concentrations of selected natural radionuclides in food samples from the Czech Republic.","authors":"Alena Kelnarová, Petra Valdezová, Věra Bečková, Helena Pilátová","doi":"10.1093/rpd/ncaf105","DOIUrl":"https://doi.org/10.1093/rpd/ncaf105","url":null,"abstract":"<p><p>Activity concentrations of radionuclides from the thorium and uranium series, which contribute most to radiation exposure through ingestion in the existing radiation situation, were measured. Activity concentrations were determined in common foods in the Czech Republic. The determination of the activity concentrations was carried out by a combination of radiochemical separation followed by emanometry, gamma spectrometry, or alpha spectrometry. Between 2020 and 2023, 51 \"mixed diet\" samples were analyzed for 226Ra and 38 for 228Ra. The average daily intake for adults was 30.8 mBq for 226Ra and 32.9 mBq for 228Ra. The annual committed effective dose for adults from food was 3.15 μSv/y for 226Ra and 8.3 μSv/y for 228Ra, both of which are lower than the doses calculated using the reference activity concentrations from the UNSCEAR (2000) report. Similarly, activity concentrations of 226Ra, 228Ra, 238U, and 234U determined in seven common foodstuffs were lower than UNSCEAR (2000). Additionally, analyses of 210Po in leafy vegetables showed the highest median values in lettuce (62-67 mBq/kg of fresh weight) and the lowest in cabbage (7-14 mBq/kg), both comparable with UNSCEAR reference values.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145113440","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":"Evaluation of sampling and analytical uncertainties and estimation of natural radioactivity levels in the soil samples in Kalpakkam, Tamilnadu.","authors":"Bommadeni Arun, Viswanathan S, Menaka M, Kothai Parthasarathy, Balasubramaniam Venkatraman","doi":"10.1093/rpd/ncaf089","DOIUrl":"10.1093/rpd/ncaf089","url":null,"abstract":"<p><p>The high-purity germanium (HPGe) detector is used to quantify natural radioactivity concentrations in soil samples. The total uncertainty due to the contribution of the analytical method and sampling uncertainty is evaluated in this study. The relative sampling uncertainty values for 40K, 238U, and 232Th are found to be within 5%. The measured specific activity levels ranged between 225.6 ± 8.5 Bq/kg and 479.6 ± 13.0 Bq/kg for 40K, 12.1.6 ± 1.4 Bq/kg and 73.2 ± 2.7 Bq/kg for 238U, and 48.7 ± 2.6 Bq/kg and 548.7 ± 17.0 Bq/kg for 232Th, respectively. The radiological hazard parameters, such as absorbed dose rates and annual effective dose values, were estimated from the 40K, 238U, and 232Th activity concentration values. The absorbed dose rate values ranged between 45 nGy/h and 383 nGy/h with a mean value of 142 nGy/h. The annual effective dose values ranged from 0.06 mSv/y to 0.47 mSv/y with a mean value of 0.17 mSv/y.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"1043-1051"},"PeriodicalIF":0.7,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144718348","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":"Development of a prediction model for ambient dose equivalent rate distribution based on ecological half-life profiles using LASSO regression and KURAMA data.","authors":"Yoshiaki Shikaze, Kimiaki Saito, Naoki Tanimura, Kazuya Yoshimura, Liu Xudong, Masahiko Machida","doi":"10.1093/rpd/ncaf086","DOIUrl":"10.1093/rpd/ncaf086","url":null,"abstract":"<p><p>The two-component model, comprising a fast-decay and a slow-decay component, has been widely used to approximate the decreasing trends of air dose rates in contaminated areas surrounding major nuclear accident sites. However, its adequacy is yet to be thoroughly validated. This study analyzed extensive car-borne survey data collected from 2011 to 2016 after the Fukushima Daiichi Nuclear Power Plant accident using the least absolute shrinkage and selection operator regression with a high-degree-of-freedom model. This analysis aimed to evaluate the adequacy of the two-component model and investigate the profiles of ecological half-lives. The results demonstrate that the two-component model can approximate the decreasing trend of air dose rates in the Fukushima area well in most cases. However, in ~20% of the cases, the one-component model provided a better fit. The fast-decay component in the two-component model exhibited a sharp ecological half-life peak below 1 y, with a frequency distribution peaking at 0.3-0.4 y. In contrast, the slow-decay component displayed a broader half-life peak in approximately half of the cases, with a frequency distribution spanning several years to over 50 y. The reduction speed of air dose rates was fastest in urban areas, followed by paddy fields, croplands, deciduous forests, and evergreen forests. The reduction speed decreased as the initial air dose rate increased, a trend explained by the weight assigned to the fast-decay component rather than the value of its ecological half-life. Future predictions of air dose rate distributions were made using a prediction model formula that incorporated the average ecological half-life profiles calculated for each land-use and initial air dose rate category. Prediction accuracy was verified through comparison with integrated map data, which merge air dose rate datasets obtained using different monitoring methods and represent the most currently reliable source. The predicted values tended to decay faster overall than the integrated map data, with an average deviation within 10% over the six-year period. This discrepancy arises because the car-borne survey data were collected on paved roads, where air dose rates decrease rapidly due to the quick washout of radiocesium. The differences between the prediction model values and integrated map values were larger for forests than for farmlands (paddy fields and croplands) and urban areas. This suggests that the reduction in air dose rates is slower in pure forests, where the car-borne surveys were rarely conducted.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"1025-1042"},"PeriodicalIF":0.7,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144699284","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":"Indoor radon concentration and public dose evaluation in Ningxia Hui Autonomous Region, China.","authors":"Liang Dong, Liying Bai, Yunyun Wu, Yanchao Song, Yanling Sun, Xuli Ji, Meilin Wang, Hongcheng Li","doi":"10.1093/rpd/ncaf088","DOIUrl":"10.1093/rpd/ncaf088","url":null,"abstract":"<p><p>The indoor radon concentration in a total of 143 rooms from 82 urban and 61 rural households in Ningxia was measured using the solid nuclear track method over four quarters for 1 y, followed by calculation of the annual effective dose. The results indicated that the mean of indoor radon concentrations was 88 Bq m-3, with a range from 39 to 226 Bq m-3. The concentrations exceeded 100 Bq/m-3 in 30% of the measurement locations, with two points measuring above 200 Bq/m-3, accounting for 1.4%. The indoor radon concentration was higher in rural areas compared to urban areas. Moreover, it exhibited a seasonal variation, with the highest levels observed during winter and the lowest during summer. Additionally, the effective dose of indoor radon among residents in Ningxia was calculated at 2.20 mSv a-1.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"1052-1058"},"PeriodicalIF":0.7,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144776018","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 z-axis coverage in computed tomography scans of the kidney, ureters, and bladder via standard operating procedures: a clinical audit report.","authors":"Reinoud Maurits Blom, Lesley Cockmartin, Nicholas Marshall, Hilde Bosmans","doi":"10.1093/rpd/ncaf091","DOIUrl":"10.1093/rpd/ncaf091","url":null,"abstract":"<p><p>Internal audit at our radiology department identified variability in doses for computed tomography scans of the kidney, ureters, and bladder (CT KUB). This prompted a revision of the standard operating procedure (SOP) using less ambiguous osseous anatomical landmarks, namely the T10 vertebra endplate and inferior margin of the pubic symphysis. The objective of this study was to evaluate the use and effectiveness of SOPs as a means of scan length optimization and dose reduction. In total 247 CT-KUB scans were retrospectively analyzed in terms of compliance with the new osseous anatomical landmarks, and in terms of total scan length and dose-length product (DLP). The intervention comprised of two phases: (1) implementation of a new SOP with less ambiguous osseous anatomical landmarks, (2) amendment of the SOP, to assist identification of T10 endplate, by means of a sagittal scout view.This phased approach to SOP adjustments produced significant reduction in over-scanning. Excess over-scanning was reduced in the first phase, with a reduction of 14% in scan length and 32% in DLP. In the second phase, scan length was further reduced by 7%. Overall, scan length decreased by 20% and DLP by 55%.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"1059-1067"},"PeriodicalIF":0.7,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144837486","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":"Study on the 241Am-Be neutron reference radiation field established at CAEP.","authors":"Song Zhang, Da-Jie Ding, Ben-Jiang Mao, Ren-Hong Zhuo, Jing Cheng, Hui Zheng, Ji-Lu Lv, Yi-Xin Liu","doi":"10.1093/rpd/ncaf094","DOIUrl":"10.1093/rpd/ncaf094","url":null,"abstract":"<p><p>In order to evaluate the field characteristics and instrument calibration capability of the 241Am-Be neutron reference radiation field at China Academy of Engineering Physics (CAEP), this paper conducted a series of researches on the radiation field. Firstly, the neutron energy spectrum of the field was investigated by multi-sphere spectrometer and Geant4. Secondly, the quantity transmission from China Institute of Atomic Energy (CIAE) to CAEP was achieved through the precision long counter system. In addition, three neutron dose rate meters from different manufacturers were calibrated in both the fields at CAEP and CIAE. Finally, the uncertainty of calibration factor for each instrument was calculated and validated in the two fields. The results demonstrated that the room scatter in the neutron radiation reference field at CAEP meet the requirement of ISO 8529 and the neutron energy spectrum measured in the field was acceptable. The range of neutron ambient dose equivalent rate that can be produced at CAEP and its uncertainty were determined. The calibration factors and their extended uncertainties obtained using two instruments in both fields were found to be reasonable and reliable. The radiation field established at CAEP can meet the routine calibration and experiment of common neutron dose rate meters.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"1068-1080"},"PeriodicalIF":0.7,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144856200","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":"Editorial remarks on radioecology topics in RPD.","authors":"Rainer Gellermann, Oliver Meisenberg","doi":"10.1093/rpd/ncaf104","DOIUrl":"https://doi.org/10.1093/rpd/ncaf104","url":null,"abstract":"<p><p>This article aims to assist authors in presenting good topics correctly when publishing in the field of radioecology in the Radiation Protection Dosimetry (RPD). It is also intended to help reviewers in reviewing and improving submitted drafts. The topics covered in this article are based on the experience the authors have gained in recent years as reviewers and co-editors of the RPD. The guidelines in this article aim to improve the quality of submissions and ensure that lower-quality submissions are either significantly improved or withheld. We only address a few typical points here and point out that these editorial comments refer exclusively to the above-mentioned field of radioecology.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145091929","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":"Impact of a patient fixation device on healthcare worker radiation doses in fluoroscopy-assisted endoscopy.","authors":"Masaki Onoe, Nobuhiko Fukuba, Yasuhide Kodama, Satoshi Kotani, Akihiko Oka, Naoki Oshima, Kotaro Shibagaki, Kousaku Kawashima, Norihisa Ishimura, Shunji Ishihara","doi":"10.1093/rpd/ncaf103","DOIUrl":"https://doi.org/10.1093/rpd/ncaf103","url":null,"abstract":"<p><strong>Background and aims: </strong>Healthcare professionals involved in fluoroscopy-guided endoscopy are occupationally exposed to ionizing radiation. We evaluated whether a patient-immobilization device, MEDO V-Fix®, reduces this exposure.</p><p><strong>Methods: </strong>Monthly effective and lens equivalent dose were measured for nurses and doctors using personal dosemeters worn inside protective gear. Data from 7 months before and 10 months after device introduction were compared. Additionally a cost-benefit analysis (CBA) of dose reduction was performed.</p><p><strong>Results: </strong>Monthly effective doses fell in both professions, but neither decline reached statistical significance. By contrast, nurses' mean lens-equivalent dose dropped sharply from 35.0 to 6.5 μSv per procedure (P < 0.01), whereas the reduction in doctors was not significant. In the CBA, assuming a 5-y service life, the benefit-to-cost ratio ranged 1.02-2.72, indicating economic merit.</p><p><strong>Conclusions: </strong>The MEDO V-Fix significantly reduces the occupational radiation exposure of endoscopy nurses and is a worthwhile investment from a CBA perspective.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145091982","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}