Radiation protection dosimetry最新文献

{"title":"Retraction of: Virtual reality training for radiation safety in cardiac catheterization laboratories - an integrated study.","authors":"","doi":"10.1093/rpd/ncag084","DOIUrl":"10.1093/rpd/ncag084","url":null,"abstract":"","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"1475"},"PeriodicalIF":0.8,"publicationDate":"2026-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148550354","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":"Retraction of: Gamma rays and neutrons attenuation performance of a developed lead borate glass for radiotherapy room.","authors":"","doi":"10.1093/rpd/ncag081","DOIUrl":"10.1093/rpd/ncag081","url":null,"abstract":"","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"1474"},"PeriodicalIF":0.8,"publicationDate":"2026-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148536743","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":"From whole-body dosimetry to local dose assessment: a 3-y experience in interventional practice.","authors":"Silvano Filice","doi":"10.1093/rpd/ncag124","DOIUrl":"https://doi.org/10.1093/rpd/ncag124","url":null,"abstract":"<p><p>This 3-y retrospective study analyzed 180 paired dosimetry records from five interventional radiologists and five cardiologists, comparing whole-body Hp(10) with eye-lens Hp(3) and extremity Hp(0.07) doses. Moderate-to-strong linear correlations were observed (r = 0.86-0.91, R2 = 0.73-0.83), indicating that chest-level dosemeters may support the estimation of localized exposure. Coefficients of variation were ~30% for k1 and 27% for k2, reflecting heterogeneous exposure conditions. Variance-component analysis showed that inter-operator variability accounted for 20%-25% of total variance, versus 75%-80% residual within-operator variability, likely reflecting differences in workload, case mix, positioning, exposure geometry, shielding, and measurement uncertainty. The eye-lens conversion coefficient was higher in cardiologists (1.8) than in the non-neurointerventional radiology/neurointerventional radiology group (0.68), suggesting that operator-group-specific conversion coefficients may be more appropriate than a single universal coefficient. Empirically derived conversion coefficients provide a valuable complementary approach for the retrospective estimation of localized dose exposure when dedicated dosimetry is unavailable.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149207854","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 exposure in Obuasi mining community: influence of dwelling materials and annual effective dose assessment.","authors":"Rita Kpordzro, Francis Otoo, Oscar K Adukpo, Anthony S K Amable, Eric T Glover, Abdallah A M Dawood","doi":"10.1093/rpd/ncag118","DOIUrl":"https://doi.org/10.1093/rpd/ncag118","url":null,"abstract":"<p><p>This study assessed indoor radon (222Rn) concentrations across 150 dwellings in Obuasi, Ghana, using CR-39 SSNTDs over a 180-day period. The influence of wall construction materials (concrete, sandcrete, clay, and wood), interior finishes (paint and paper plaster), and floor variations (mortar and tile) on radon levels were evaluated alongside soil (226Ra) activity and 222Rn exhalation rates. Indoor 222Rn varied from 15.1 to 64.9 Bq m-3 (AM: 87.9 ± 10.1 Bq/m3), with concrete dwellings recording the highest concentrations and wooden dwellings the lowest. Bedrooms exhibited the highest indoor radon concentrations, consistent with limited ventilation and typically longer occupancy periods. Paper-plastered walls and tiled floors were associated with lower radon levels compared to painted walls and mortar floors. Strong positive correlations were observed between soil 226Ra, 222Rn exhalation rate (r = 0.87), and indoor radon (r = 0.61), confirming geogenic sources as primary contributors to indoor radon variability. Annual effective doses ranged from 0.3 to 9.2 mSv/yr, with 13% of locations exceeding International Commission on Radiological Protection (ICRP) reference limits. These findings offer evidence-based guidance for safer construction practices and support the development of national radon reference levels in Ghana.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149167931","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 high-dose alerts in computed tomography using an automated dose monitoring system: a retrospective institutional study.","authors":"Mohammed Alanazi, Peter Kench, Seyedamir Tavakoli-Taba, Matthew Russell, Ernest Ekpo","doi":"10.1093/rpd/ncag120","DOIUrl":"https://doi.org/10.1093/rpd/ncag120","url":null,"abstract":"<p><p>Radiation dose monitoring software (DMS) tools are increasingly used to support automated monitoring of radiation dose in medical imaging. This study evaluated the frequency and causes of high-dose events detected by a DMS in computed tomography (CT). All CT examinations performed at one hospital across three CT scanners over a one-year period were retrospectively analysed to establish the frequency and causes of high-dose alerts. Descriptive statistics summarized alert frequency and distribution, and multivariable logistic regression identified factors independently associated with high-dose alerts. Of 11,865 CT examinations, 851 (7%) exceeded predefined dose thresholds. High-dose alerts occurred most frequently in spine (17%), musculoskeletal joint (14%), abdomen/pelvis (8%), vascular angiography (8%), chest/lung (5%), and head/face (4%) examinations. Reasons for high-dose alerts included high body mass index (29%), scan repetition (25%), additional scans (15%), patient malpositioning (12%), excess scan range (11%), and orthopaedic hardware (6%). Multivariable analysis showed that overweight status, scanner model, spine and joint examinations, and patients aged 45-74 years were independently associated with high-dose alert occurrence (P < .05). DMS is an effective tool that enables imaging facilities to automatically identify high-dose events, facilitating investigation of their causes, protocol review, and identification of opportunities for dose optimisation.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149148717","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":"External dose characteristics and radiation-protection metrics after permanent 125I prostate brachytherapy: comparison of conventional and sparse implantation techniques.","authors":"Seung Young Ko, Hyun Soo Shin, Dong Soo Park, Jung Ho Im","doi":"10.1093/rpd/ncag122","DOIUrl":"https://doi.org/10.1093/rpd/ncag122","url":null,"abstract":"<p><p>This study compared external dose rates and radiation protection metrics between the conventional whole-gland technique (CWT) and sparse implantation technique (SIT) in 100 patients (50 each with CWT and SIT) undergoing permanent 125I prostate brachytherapy. External dose rates were measured at various distances from the anterior body surface at 1 and 30 days post-procedure. Time-dependent dose rates were estimated using an exponential decay model based on the physical half-life and compared with measured values. Lifetime cumulative effective dose, cumulative effective dose during the first 60 days, and distance-specific precaution periods were also evaluated using occupancy factors. SIT reduced external radiation exposure and shortened the precaution period compared with CWT. The precaution period increased nonlinearly at closer ranges and was consistently shorter in the SIT group compared with the CWT group. Utilizing cumulative effective dose assessments during the initial 60 days post-procedure provides a practical radiation protection indicator for real-world environments.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149128467","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":"Measured fetal-region dose in X-ray pelvimetry and low-dose computed tomography using a realistic pregnant phantom: a comparative study.","authors":"Yuta Matsunaga, Masanao Kobayashi, Koichi Chida, Yasuki Asada","doi":"10.1093/rpd/ncag119","DOIUrl":"https://doi.org/10.1093/rpd/ncag119","url":null,"abstract":"<p><p>This study evaluated fetal-region doses and dose distributions for X-ray pelvimetry (Guthmann and Martius methods) using exposure conditions from a nationwide survey in Japan and compared them with those of a low-dose computed tomography (CT) protocol using a realistic late-pregnancy phantom. A pregnancy model phantom combining an anthropomorphic phantom with a custom-made abdominal phantom was used. Real-time dosimeters were placed at 18 sites across three abdominal levels. The low-dose CT protocol showed a nearly uniform fetal-region dose distribution, whereas the X-ray methods showed heterogeneous distributions depending on beam direction and irradiation field. The reported mean fetal-region doses were 1.16 mGy for Guthmann, 4.05 mGy for Martius, 5.21 mGy for the combined X-ray examinations, and 0.69 mGy for low-dose CT. These results indicate that the low-dose CT protocol evaluated in this study produced a lower fetal-region dose than the Guthmann and Martius methods evaluated in this study.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149128516","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 concentration of 137Cs and natural radionuclides in soil around the Belarusian nuclear power plant in the pre-commissioning period.","authors":"Christian Bernhardsson, Valery Ramzaev, Aliaksandr Dvornik, Mattias Jönsson, Guillaume Pédehontaa-Hiaa, Alexander Vodovatov, Vladislav Nekrasov, Charlotta Nilsson, Kristina Eriksson Stenström","doi":"10.1093/rpd/ncag063","DOIUrl":"10.1093/rpd/ncag063","url":null,"abstract":"<p><p>In this study, soil cores (0-20 cm) were collected at 45 sites located within a 30-km radius zone around the Belarusian nuclear power plant (BelNPP) in 2019 before its commissioning. Activity of gamma-emitting radionuclides was measured in the samples using HPGe detectors. The study revealed low levels of 137Cs in the soil: the weighted average dry weight (d.w.) activity concentration (ACw) varied from 1.13 to 8.71 Bq/kg (d.w.). The ACw of natural radionuclides ranged: for 226Ra from 7.8 to 30.8 Bq/kg (d.w.), for 232Th from 10.9 to 33.0 Bq/kg (d.w.), and for 40K from 376 to 789 Bq/kg (d.w.). A good agreement between the ambient dose equivalent rate (ADER) values calculated with the soil samples and the ADER values previously measured in situ at the same sites is observed. The sites characterized here now have established pre-operational levels of 137Cs, 226Ra, 232Th, and 40K in soil thus can be surveyed again in future environmental studies.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"1291-1305"},"PeriodicalIF":0.8,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13639805/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148353311","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":"The establishment and implementation of Indonesian diagnostic reference levels: a national framework for optimizing medical radiation exposure.","authors":"Endang Kunarsih, Ida Bagus Gede Putra Pratama, Hermansyah, Rusmanto, Lukmanda Evan Lubis, Choirul Anam","doi":"10.1093/rpd/ncag068","DOIUrl":"10.1093/rpd/ncag068","url":null,"abstract":"<p><p>Diagnostic Reference Levels (DRLs) are a fundamental instrument for optimizing patient radiation protection in medical imaging. However, establishing and sustaining a nationally representative DRL system in a geographically vast and resource-diverse country presents significant methodological, regulatory, and operational challenges. Ensuring nationwide dose reporting, harmonizing heterogeneous examination protocols, and translating benchmark values into sustained clinical optimization remain complex tasks, particularly in large archipelagic settings. This study presents Indonesia's experience in establishing, implementing, and periodically reviewing its national DRLs across all major diagnostic modalities through a regulator-led national dose optimization framework. The Indonesian DRLs was established through a nationwide dose survey using the National Patient Dose Data Information System, enabling cumulative nationwide dose data collection from more than 1000 licensed healthcare facilities between 2015 and 2025. Dose data were obtained using direct and indirect dosimetry methods, and Indonesian DRL (IDRL) values were derived as the 75th percentile of facility median doses following regulator-led multi-stakeholder validation. Indonesian DRLs have been established for general radiography, computed tomography (CT), interventional fluoroscopy, mammography, dental radiography, and diagnostic nuclear medicine. The IDRL is subject to periodic review at least every five years, or earlier in response to significant technological advancements or changes in clinical practice. The 2025 review showed reduced DRL values in radiography and CT, indicating improved optimization practices, whereas increases in interventional fluoroscopy reflected growing procedural complexity and the need for complexity-adjusted approaches. Key challenges include variable facility participation, heterogeneous examination protocols, gaps in dosimetry expertise, and a shortage of medical physicists. Indonesia's experiences highlight that sustainable DRL implementation requires robust data systems, stakeholder engagement, regulatory enforcement, and capacity building. This experience offers valuable insights for other large and diverse countries seeking to establish effective national DRL frameworks.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"1327-1339"},"PeriodicalIF":0.8,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148405537","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":"Visualization of time-resolved scattered radiation distribution in a computed tomography room utilizing a semiconductor survey meter.","authors":"Masanao Kobayashi, Juria Suzuki, Yusei Nishihara, Tomonobu Haba, Shigeki Kobayashi","doi":"10.1093/rpd/ncag073","DOIUrl":"10.1093/rpd/ncag073","url":null,"abstract":"<p><p>In diagnostic computed tomography (CT), radiological technologists and assisting staff may need to remain inside the CT room during patient assistance. Understanding temporal changes in scattered radiation distribution is therefore important for reducing occupational exposure. Conventional measurements mainly provide instantaneous dose rates or accumulated doses and are less suited to intuitively capturing temporal changes during CT scanning. This study conducted a fundamental investigation of a visualization approach, defined as dynamic dose distribution (DDD), based on time-resolved air kerma measurements obtained with a semiconductor survey meter. Scattered radiation was measured during chest-to-pelvis helical CT scanning of an anthropomorphic phantom under fixed tube current and automatic exposure control conditions. DDD allowed temporal changes in scattered radiation distribution to be visually identified in relation to tube current modulation, patient table position, and measurement height. DDD may provide useful temporal information for considering staff positioning and reducing occupational exposure.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"1354-1364"},"PeriodicalIF":0.8,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148448946","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}