Radiation protection dosimetry最新文献_第5页

Detection, identification, and management of alpha-emitting radioactive waste in scrap metal: a case study from Kosovo. 探测、识别和管理废金属中释放α的放射性废物：来自科索沃的案例研究。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2026-09-17 DOI: 10.1093/rpd/ncag080

Blerim Rrakaqi, Ylli Kaçiu, Shyqeri Dumani, Njomza Elezaj

{"title":"Detection, identification, and management of alpha-emitting radioactive waste in scrap metal: a case study from Kosovo.","authors":"Blerim Rrakaqi, Ylli Kaçiu, Shyqeri Dumani, Njomza Elezaj","doi":"10.1093/rpd/ncag080","DOIUrl":"https://doi.org/10.1093/rpd/ncag080","url":null,"abstract":"Detection and management of alpha (α)-emitting radioactive sources in scrap metal present a significant challenge for radiological safety, particularly in countries lacking infrastructure for the final disposal of radioactive waste. This paper presents a case study from Kosovo addressing the detection, identification, dose measurement, and isolation of an alpha-emitting radioactive source discovered in scrap metal. Identification was performed using portable radiation survey instruments and gamma spectrometry, confirming the presence of thorium-232 and uranium-232. Measurements indicated a count rate of ~2000 cps and a maximum ambient dose rate of 6.51 μSv/h measured at an approximate distance of 5 cm from the radioactive source prior to isolation and concrete filling. To reduce exposure and contamination risks, the source was isolated in a 200-L metal drum filled with reinforced concrete. Dose rate mapping performed before and after isolation demonstrated a significant reduction in radiation levels, with a maximum reduction factor of 4.86, indicating a measurable reduction in ambient dose rate following temporary isolation.","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148991230","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

Influence of collimation on radiation exposure during chest radiography. 胸片中准直对辐射暴露的影响。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2026-09-11 DOI: 10.1093/rpd/ncag110

Špela Vičar, Erna Alukić, Laura Jurša, Nejc Mekiš

{"title":"Influence of collimation on radiation exposure during chest radiography.","authors":"Špela Vičar, Erna Alukić, Laura Jurša, Nejc Mekiš","doi":"10.1093/rpd/ncag110","DOIUrl":"https://doi.org/10.1093/rpd/ncag110","url":null,"abstract":"The aim was to assess the impact of collimation on the field of view, dose-area product, effective dose, and absorbed dose to organs located in or near the primary beam. Data were collected using two Siemens radiography units. Imaging was performed under standard clinical protocols in posteroanterior (PA) and lateral projections. Images from 372 patients aged 18 years or older were randomly selected for analysis. For each image, exposure parameters, dose-area product, and field of view were recorded. Based on the field of view, images were classified as optimally or non-optimally collimated. Effective dose and absorbed organ doses were calculated using PCXMC 2.0. With optimal collimation, the field of view was reduced by up to 14.5%, and the dose-area product decreased by 26.6% in the PA projection and 48.4% in the lateral projection. Correspondingly, the effective dose was reduced by 18.3% in PA and 49.1% in lateral projections. Absorbed doses to selected organs decreased by 10%-55.5% in PA and 31.8%-60.9% in lateral projections. The results indicate that collimation is an essential optimization tool that can significantly reduce the patient's dose, thereby lowering the risk of radiation-induced complications.","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148945649","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

Regulatory survey of ambient dose equivalent rates around baggage scanners in Tanzania. 坦桑尼亚行李扫描仪周围环境剂量当量率的管制调查。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2026-09-11 DOI: 10.1093/rpd/ncag103

Atumaini A Makoba, Mikidadi S Gurisha, Julius S Chiuyo, Innocent J Lugendo

引用次数: 0

Spatial distribution of X-ray attenuation in a full-face shield: a multipoint in vivo study in interventional cardiology. 全面屏蔽中x射线衰减的空间分布：介入心脏病学的多点体内研究。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2026-09-09 DOI: 10.1093/rpd/ncag109

Faustino Bonutti, Enrico Favaretto, Ana Gisel Garcia Alvarado, Veronica Rosso, Sarah Bassi, Serena D'Agostini, Eugenia Moretti

{"title":"Spatial distribution of X-ray attenuation in a full-face shield: a multipoint in vivo study in interventional cardiology.","authors":"Faustino Bonutti, Enrico Favaretto, Ana Gisel Garcia Alvarado, Veronica Rosso, Sarah Bassi, Serena D'Agostini, Eugenia Moretti","doi":"10.1093/rpd/ncag109","DOIUrl":"https://doi.org/10.1093/rpd/ncag109","url":null,"abstract":"Occupational radiation exposure remains a critical concern in interventional cardiology, particularly regarding brain and ocular protection. This study evaluates the protective efficacy of a 0.12 mmPb leaded acrylic full-face shield through a series of comprehensive in vivo dose measurements conducted on a primary cardiologist during real-time fluoroscopy procedures. The cardiologist was equipped with a tight-fitting elastic mask where 29 small pockets were distributed across the head, housing 29 thermoluminescent dosemeters (TLD) calibrated in Hp(0.07). Two series of measurements were conducted: the first using the leaded acrylic face shield without protective glasses, and the second without the leaded face shield and with protective glasses. The Dose Reduction Factors (DRFs) for the different superficial head areas, calculated as the ratio of Hp(0.07) with and without the leaded face shield, depended on the measurement point as expected and ranged between 0.32 and 0.57, where the lower value was for the frontal lobe. Regarding dose reduction measured around the eye orbit, a DRF of 0.10 and 0.35 was achieved for the right and left sides, respectively, indicating a significant level of protection of the ocular area.","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148920951","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

Lifetime attributable cancer risk assessment in pediatric patients undergoing I-124 PET for differentiated thyroid cancer. 接受I-124 PET治疗分化型甲状腺癌的儿科患者的终生归因癌风险评估

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2026-09-08 DOI: 10.1093/rpd/ncag107

Amirhossein Maddahi, Roghiye Bodaghi Hosseinabadi, Asra Sadat Talebi

{"title":"Lifetime attributable cancer risk assessment in pediatric patients undergoing I-124 PET for differentiated thyroid cancer.","authors":"Amirhossein Maddahi, Roghiye Bodaghi Hosseinabadi, Asra Sadat Talebi","doi":"10.1093/rpd/ncag107","DOIUrl":"https://doi.org/10.1093/rpd/ncag107","url":null,"abstract":"The increasing use of I-124 PET for differentiated thyroid cancer (DTC) has raised concerns about radiation exposure in pediatric patients because of their radiosensitivity. This study estimated organ-absorbed doses and the lifetime attributable risk (LAR) of secondary cancer following I-124 PET using Monte Carlo simulations with pediatric voxel phantoms representing 10- and 15-year-old males and females. Organ doses were calculated for oral and intravenous administration under different thyroid uptake conditions, and LAR was estimated using the Biological Effects of Ionizing Radiation (BEIR) VII model. The thyroid absorbed dose was slightly higher after intravenous administration, whereas the total-body dose depended mainly on age. Younger patients showed nearly twice the LAR of older patients. Females had a higher solid cancer risk, whereas leukemia risk was greater in males. Thyroid uptake and administration route had minimal effect on LAR. These findings support individualized I-124 PET protocols to maximize diagnostic benefit while minimizing long-term radiation risk in pediatric DTC.","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148913236","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

Design of modified flattening filter for International Organization for Standardization recommended 147Pm beta source: a Monte Carlo approach. 国际标准化组织推荐的147Pm beta源的改进扁化滤波器设计：蒙特卡罗方法。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2026-09-08 DOI: 10.1093/rpd/ncag108

Sujoy Chatterjee, Rolf Behrens, Rohit Yadav, Ashok K Bakshi, Balvinder K Sapra

引用次数: 0

Neutron dosimetry is a nasty complicated business. 中子剂量测定是一项非常复杂的工作。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2026-09-04 DOI: 10.1093/rpd/ncag106

Yigal S Horowitz, Ilan Eliyahu

引用次数: 0

Patient radiation dose in diagnostic cerebral angiography for intracranial aneurysm: local diagnostic reference levels from a single-center study in Thailand. 在诊断颅内动脉瘤的脑血管造影中的患者辐射剂量：来自泰国单中心研究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 : 2026-09-01 DOI: 10.1093/rpd/ncag105

Similan Pookplean, Phonlapat Meesa-Nga, Sirikan Kittichotwarat, Petdao Petchuay

{"title":"Patient radiation dose in diagnostic cerebral angiography for intracranial aneurysm: local diagnostic reference levels from a single-center study in Thailand.","authors":"Similan Pookplean, Phonlapat Meesa-Nga, Sirikan Kittichotwarat, Petdao Petchuay","doi":"10.1093/rpd/ncag105","DOIUrl":"https://doi.org/10.1093/rpd/ncag105","url":null,"abstract":"Diagnostic cerebral angiography for intracranial aneurysms can deliver relatively high patient radiation doses, and locally derived diagnostic reference levels (DRLs) are important for optimization. This retrospective single-center study analyzed 186 procedures performed at Vajira Hospital between 2022 and 2024 using a biplane digital subtraction angiography system. Dose-area product (DAP), cumulative air kerma (CAK), fluoroscopy time, number of image frames, and number of three-dimensional rotational angiography (3DRA) acquisitions were recorded for each procedure. Median values across all years served as local typical dose values and were compared with published 75th percentile DRLs, consistent with the International Commission on Radiological Protection (ICRP) 135. The medians were 58.58 Gy·cm2 (DAP), 326.74 mGy (CAK), 6.41 min (fluoroscopy time), 525.50 frames, and 3.00 3DRA acquisitions, with no significant interannual differences. Typical values for DAP, CAK, and fluoroscopy time were lower than those reported in several national and international studies, indicating comparatively low patient doses.","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148875978","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

Four decades of post-Chernobyl 137Cs vertical migration in undisturbed soil in Northern Greece: a parsimonious process-based modeling analysis. 切尔诺贝利事故后40年137Cs在希腊北部未受干扰土壤中的垂直迁移：基于过程的简约建模分析。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2026-09-01 DOI: 10.1093/rpd/ncag102

Alexandros Clouvas, Ioannis Kaissas, Stelios Xanthos

{"title":"Four decades of post-Chernobyl 137Cs vertical migration in undisturbed soil in Northern Greece: a parsimonious process-based modeling analysis.","authors":"Alexandros Clouvas, Ioannis Kaissas, Stelios Xanthos","doi":"10.1093/rpd/ncag102","DOIUrl":"https://doi.org/10.1093/rpd/ncag102","url":null,"abstract":"This study investigates the long-term vertical migration of 137Cs in undisturbed grassland soil using a unique 40-year monitoring dataset (1987-2026) from Northern Greece established after the Chernobyl accident. Fractional 137Cs depth distributions measured in six 5 cm soil layers (0-30 cm) were analysed using a parsimonious 1D process-based model incorporating advection, hydrodynamic dispersion, and an effective irreversible transfer from a migrating to a fixed phase. Model parameters were estimated through hybrid global-local optimization, and their uncertainty was evaluated by residual bootstrap analysis. A single parameter set successfully reproduced the temporal evolution of all measured depth profiles, yielding strong overall agreement with observations. The estimated effective transport parameters were an advective migration velocity of 0.217 ± 0.093 cm y-1, a dispersion coefficient of 0.24 ± 0.48 cm2 y-1, and an effective fixation coefficient of 0.0365 ± 0.0178 y-1. The dispersion coefficient exhibited substantial uncertainty because of the limited vertical resolution (5 cm) sampling intervals, whereas the fixation parameter was more robustly constrained and represents the residual long-term transfer required to reproduce the observed profile evolution after the initial rapid postdepositional fixation period. These results demonstrate that a parsimonious process-based model provides an effective description of the long-term redistribution of 137Cs at the monitored undisturbed grassland site in Northern Greece.","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148875970","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

Natural radionuclide activity in food and dietary dose from 226Ra and 228Ra in southeastern coastal India. 印度东南沿海地区食物中的天然放射性核素活度及226和228Ra的膳食剂量。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2026-08-31 DOI: 10.1093/rpd/ncag048

Padma Savitri Pemmaraju, Ramesh B, Sudhakar J, Balaram Kumar R, Manoj Warrier, Rao A D P, Vinod Kumar A

{"title":"Natural radionuclide activity in food and dietary dose from 226Ra and 228Ra in southeastern coastal India.","authors":"Padma Savitri Pemmaraju, Ramesh B, Sudhakar J, Balaram Kumar R, Manoj Warrier, Rao A D P, Vinod Kumar A","doi":"10.1093/rpd/ncag048","DOIUrl":"10.1093/rpd/ncag048","url":null,"abstract":"This study presents the first systematic assessment of dietary radiation exposure among the southeastern coastal population of India using Market Basket Survey (MBS), Canteen Meal Survey (CMS) methodologies. Locally consumed food items collected over a decade were analyzed using high-resolution gamma spectrometry to determine the activity concentrations of 226Ra, 228Ra, 40K, and 137Cs. As the ingestion dose from 40K remains relatively constant due to homeostatic regulation and 137Cs levels were negligible, the annual effective ingestion dose was evaluated based on 226Ra and 228Ra using measured concentrations and regional adult consumption rates. The estimated annual doses were 0.019 ± 0.01 mSv (MBS) and 0.007 mSv (CMS), with the higher MBS value reflecting its conservative nature. Comparison with similar studies from India and other regions indicates that the estimated doses lie within the global range reported for normal background radiation areas. These results provide a site-specific baseline for chronic ingestion exposure and support regional radiological risk assessment and long-term environmental monitoring.","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"1131-1143"},"PeriodicalIF":0.8,"publicationDate":"2026-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148034546","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