Radiation protection dosimetry最新文献_第4页

Establishment of diagnostic reference levels for dental cone beam computed tomography in Tabriz, Iran. 在伊朗大不里士建立牙科锥束计算机断层扫描诊断参考水平。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-06-19 DOI: 10.1093/rpd/ncaf063

Sina Mardfar, Mona Fazel Ghaziyani, Arman Saeedi Vahdat, Davood Khezerloo

{"title":"Establishment of diagnostic reference levels for dental cone beam computed tomography in Tabriz, Iran.","authors":"Sina Mardfar, Mona Fazel Ghaziyani, Arman Saeedi Vahdat, Davood Khezerloo","doi":"10.1093/rpd/ncaf063","DOIUrl":"10.1093/rpd/ncaf063","url":null,"abstract":"Objectives: Cone beam computed tomography (CBCT) scans, essential for medical imaging, expose patients to radiation. To ensure safety, this study aimed to establish typical diagnostic reference levels (DRLs) and estimate median organ doses and cancer risks associated with CBCT scans in the Tabriz region, Iran.Results: Patient data from 196 individuals undergoing common CBCT procedures were collected. Effective and organ doses were estimated using VirtualDoseCT software. Lifetime attributable risk of cancer incidence was estimated using BEIR VII report. DRL values were established based on gender and indication. Indication based values were 341 mGy.cm2 for implants, 387 mGy.cm2 for lesions, and 342 mGy.cm2 for sinus scans. Effective doses (EDs) were analyzed, yielding values of 30 μSv for males and 20 μSv for females. Organ doses analysis revealed that salivary glands received the highest dose, while thymus had the lowest in both genders. Lifetime attributable risk of cancer incidence was evaluated and found to be 0.0027 in 100 000 for male patients and 0.0084 in 100 000 for female patients.Conclusions: The study highlights the importance of minimizing radiation exposure in CBCT examinations to reduce the risk of cancer and heritable effects. Tailored scan protocols and optimization measures can enhance patient safety by lowering doses. The results offer valuable guidance for dental and maxillofacial imaging practices on radiation doses and DRLs in CBCT examinations.","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"641-647"},"PeriodicalIF":0.8,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144174624","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

Issues in monitoring orthopedic surgeons with active personal dosemeters when exposed to pulsed X-ray fields during orthopedic procedures. 在骨科手术过程中暴露于脉冲x射线场时使用主动个人剂量计监测骨科医生的问题。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-06-19 DOI: 10.1093/rpd/ncaf061

Munehiko Kowatari, Koichi Nakagami, Yasukazu Hijikata, Kazuta Yamashita, Yuta Hirai, Satoru Matsuzaki, Takashi Moritake, Tomoya Tsuji, Hayo Zutz, Steffen Ketelhut, Oliver Hupe

{"title":"Issues in monitoring orthopedic surgeons with active personal dosemeters when exposed to pulsed X-ray fields during orthopedic procedures.","authors":"Munehiko Kowatari, Koichi Nakagami, Yasukazu Hijikata, Kazuta Yamashita, Yuta Hirai, Satoru Matsuzaki, Takashi Moritake, Tomoya Tsuji, Hayo Zutz, Steffen Ketelhut, Oliver Hupe","doi":"10.1093/rpd/ncaf061","DOIUrl":"10.1093/rpd/ncaf061","url":null,"abstract":"It is crucial to monitor healthcare workers' radiation exposure, especially given the increasing reliance on X-ray imaging technologies. In response to new evidence that the threshold for lens opacity is lower than previously thought, the International Commission on Radiological Protection (ICRP) has revised the annual dose limit for exposure to the lens of the eye. After the revision of the annual eye lens dose limit, the new survey on the dosemeter wearing rate was conducted in Japan. The result showed that despite the presence of monitoring protocols, the dosemeter wearing rate among healthcare workers was still low. Compliance often lacked robust verification measures, especially in smaller medical facilities. Active personal dosemeters (APDs) are commonly used in Japan, although studies suggest that they may underestimate exposure in certain settings, such as pulsed X-ray fields. Passive dosemeters, on the other hand, serve as legal dosemeters, offering a more accurate assessment of radiation exposure. This article addresses issues related to the monitoring of healthcare workers using APDs and clarifies concerns regarding the use of APDs by orthopedic surgeons during procedures involving high-dose X-ray exposure. A series of performance tests suggested that the APDs worn by orthopedic surgeons, who are often exposed to higher dose rates near patients, may underestimate radiation levels during procedures. This underestimation occurs because the surgeons are exposed to pulsed, scattered X-ray fields with energies ranging from 20 and 100 keV. The results also suggest monitoring techniques should be improved to ensure the safety of healthcare workers.","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"663-671"},"PeriodicalIF":0.8,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144234955","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 exposure reduction using an equalization filter during percutaneous coronary intervention: a preliminary study. 经皮冠状动脉介入治疗期间使用均衡滤光器减少辐射暴露：初步研究。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-06-19 DOI: 10.1093/rpd/ncaf062

Nao Ichikawa, Atsushi Fukuda, Takuma Hayashi, Yosuke Hattori, Kosuke Matsubara

引用次数: 0

Unidimensional neutron shielding model for VARSKIN. VARSKIN的一维中子屏蔽模型。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-06-19 DOI: 10.1093/rpd/ncaf052

Zane Tucker, Charlotte Rose

引用次数: 0

Fluorescence X-ray field for radiation dosemeters calibration. 用于辐射剂量计校准的荧光x射线场。

IF 0.8 4区环境科学与生态学

Radiation protection dosimetry Pub Date : 2025-06-19 DOI: 10.1093/rpd/ncaf060

Tomoya Tsuji, Hiroshi Yoshitomi, Fuminobu Sato, Yoshihiko Tanimura

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

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