Radiation protection dosimetry最新文献_第3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

Evaluation of external radiation exposure in patients treated with 177Lu-PSMA and radiation safety assessment of the patient caregivers. 177Lu-PSMA治疗患者的外辐射暴露评价及患者护理人员的辐射安全性评价。

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/ncaf059

Peyman Sheikhzadeh, Saeed Farzanehfar, Mehrshad Abbasi, Zeinab Bayat, Mohammadreza Abdolmaleki, Fereshteh Koosha, Nima Kasraie

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

Effects of neutron, γ-ray, and neutron-γ-ray mixed radiations on chromosomal aberrations in peripheral blood lymphocytes of two males. 中子、γ射线和中子-γ射线混合辐射对两种男性外周血淋巴细胞染色体畸变的影响。

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/ncaf056

Zhongxin Zhang, Jiamei Bai, Qianqian Meng, Ruifeng Zhang, Xuhong Dang, Xiaoming Liu, Yayi Yuan, Hongyan Liu, Yue Ren, Biao Yang, Zhikai Duan

{"title":"Effects of neutron, γ-ray, and neutron-γ-ray mixed radiations on chromosomal aberrations in peripheral blood lymphocytes of two males.","authors":"Zhongxin Zhang, Jiamei Bai, Qianqian Meng, Ruifeng Zhang, Xuhong Dang, Xiaoming Liu, Yayi Yuan, Hongyan Liu, Yue Ren, Biao Yang, Zhikai Duan","doi":"10.1093/rpd/ncaf056","DOIUrl":"10.1093/rpd/ncaf056","url":null,"abstract":"This study aimed to explore the relative biological effectiveness (RBE) of monoenergetic neutrons and the interactions of mixed radiation by investigating the biological effects of neutron, 137Cs γ-ray, and neutron-γ-ray mixed radiations on chromosomal aberrations in human peripheral blood lymphocytes. Human peripheral blood lymphocytes were treated with neutrons from the Intensive Deuterium and Tritium Neutron Source Science Facility and a gamma source from the 137Cs γ-ray source of the Chinese Academy of Sciences for follow-up experimental results. The chromosomal aberrations were analyzed in lymphocytes exposed to neutron, 137Cs γ-ray, and mixed radiations, and the RBE values of neutron radiation were calculated. The statistical distribution of chromosomal aberrations was tested using the dispersion index and Mann-Whitney Utest for all doses to conform to a Poisson distribution. The χ2test was used to compare the yields of dicentric and centromeric rings among different radiation groups and evaluate the goodness of fit of the dose-response curve. We used the ztest to evaluate the significance of the equation coefficients. The RBE for 10 dicentrics per 100 cells was 2.8 for neutron radiation. For 20 dicentrics per 100 cells, the respective value was 2.05. The yields of dicentric and centromeric rings significantly increased in the mixed radiation group compared with the 137Cs γ-ray group at the dose of 0.7 Gy. The considerations of the dose dependence of RBE and the intercellular interactions were indispensable for the precise estimation of the biological effect of neutron treatment on tumors.","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"613-621"},"PeriodicalIF":0.8,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144111567","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

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

Establishing local diagnostic reference levels for adult whole-body PET/CT in Malaysia. 在马来西亚建立成人全身PET/CT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 : 2025-06-05 DOI: 10.1093/rpd/ncaf053

Abdallah Al Said, Azhar Abdul Rahman, Fatin Nadhirah Binti A Halim, Laith Albadarneh, Ammar A Oglat, H H Saleh, Wesal Shloul, Yahya Alshloul

{"title":"Establishing local diagnostic reference levels for adult whole-body PET/CT in Malaysia.","authors":"Abdallah Al Said, Azhar Abdul Rahman, Fatin Nadhirah Binti A Halim, Laith Albadarneh, Ammar A Oglat, H H Saleh, Wesal Shloul, Yahya Alshloul","doi":"10.1093/rpd/ncaf053","DOIUrl":"10.1093/rpd/ncaf053","url":null,"abstract":"Background: The combination of positron emission tomography (PET) and computed tomography (CT) scanning has significantly transformed the field of nuclear medicine.Purpose: This study aims to establish local diagnostic reference levels (LDRLs) for adult positron emission tomography/computed tomography (PET/CT) scans utilizing three radiotracers:18F-fluorodeoxyglucose (18F-FDG), 68Gallium-prostate-specific-membrane-antigen (68Ga-PSMA), and 68Gallium-etraazacyclododecane-tetraacetic-acid-octreotide (68Ga-DOTATATE).Methods: Demographic data, radiation dose information, scanner PET/CT system specifications, and acquisition protocols were collected from the Department of Nuclear Medicine at Penang Hospital in Malaysia. The LDRL was determined by calculating the 50th percentile.Results: The proposed LDRLs values for whole-body 18F-FDG, 68Ga-PSMA and 68Ga-DOTATATE scans were 264 MBq, 194.07 MBq, and 186.85 MBq, respectively. The proposed LDRL for the diagnostic CT parameters (CTDIvol and DLP) associated with whole-body 18F-FDG PET/CT scans were 4.04 mGy and 412.25 mGy.cm, while proposed LDRL values for 68Ga-PSMA and 68Ga-DOTATATE scans were 4.33 mGy and 452.16 mGy.cm, and 4.51 mGy and 468.69 mGy.cm, respectively.Conclusion: The administered activity of 18F-FDG, 68Ga-PSMA, and 68Ga-DOTATATE examinations can be reduced without compromising or affecting the image quality. The proposed LDRL values for the CT parameters of the whole-body 18F-FDG examinations were the lowest among all compared values, but 68Ga-PSMA and 68Ga-DOTATATE examinations require further studies to optimize patient radiation doses in Malaysia and other regions while maintaining image quality.","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"568-576"},"PeriodicalIF":0.8,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144094346","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 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

A preliminary study on the environmental monitoring, and estimation of the environmental dose in a high natural background radiation area of Ramsar, Iran. 伊朗拉姆萨尔高自然本底辐射区环境监测和环境剂量估计的初步研究。

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/ncaf051

Sedigheh Sina, Mehrnoosh Karimipourfard, Fatemeh Lotfalizadeh, Zahra Rakeb, Fatemeh N Alizadeh, Amirali Falakian

{"title":"A preliminary study on the environmental monitoring, and estimation of the environmental dose in a high natural background radiation area of Ramsar, Iran.","authors":"Sedigheh Sina, Mehrnoosh Karimipourfard, Fatemeh Lotfalizadeh, Zahra Rakeb, Fatemeh N Alizadeh, Amirali Falakian","doi":"10.1093/rpd/ncaf051","DOIUrl":"10.1093/rpd/ncaf051","url":null,"abstract":"High natural background radiation areas (HNBRAs) worldwide contribute additional radiation doses to humans, plants, and land animals. Among these regions, Talesh Mahalleh in Ramsar, Iran, is notable for having the highest levels of natural background radiation in the world. This study aimed to assess the natural radioactivity in this region. The study was performed in three phases: (i) analyzing the activity concentrations of radioactive elements in samples of soil, water, and plants, collected from various parts of Talesh Mahalleh, by gamma spectroscopy using a high-purity germanium detector. (ii) Measurement of the environmental radiation doses in different locations of the high background area using thermoluminescence dosimetry (TLD), for 2 months. (iii) The environmental radiation monitoring using a calibrated survey meter. The concentrations of natural radioactive materials, like Ra-226, Th-232, and K-40 activity were measured in soil, water, and plants. Based on the results, the maximum concentration of Ra-226 in the soil samples prepared from Talesh Mahalleh was found to be 16 687 Bq/kg. The survey meter indicated the dose rates of 2.51 to 8.43 μSv/h in the high background area of Talesh Mahalleh, which is much higher than the average natural background in the world. The results of TLD are in consistent with the online environmental monitoring. This preliminary research highlights the critical need for further studies on the measurement of external and internal dosimetry for terrestrial animals of this HNBRA.","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"541-551"},"PeriodicalIF":0.8,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144094357","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