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Research on the influence of power frequency magnetic field of pantograph on pacemaker wearers’ health in high-speed EMU Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2024-03-15 Rui Tian, Wei-Xuan Li, Mai Lu, Li Yu, Jia-Qi Zhang
When the popular means of transportation—high-speed trains meet the increasing rate of pacemaker implantation year by year, the research on the magnetic field environment on the health of pacemaker wearers in the carriage becomes an urgent problem. In this work, models of an electric multiple unit carriage with a pantograph as well as passengers with pacemakers were built by using COMSOL Multiphysics
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Assessment of fetal radiation exposure in pregnant women undergoing computed tomography and rotational angiography examinations for pelvic trauma Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2024-03-15 Yuta Matsunaga, Tomonobu Haba, Masanao Kobayashi, Shoichi Suzuki, Yasuki Asada, Koichi Chida
This study aimed to assess fetal radiation exposure in pregnant women undergoing computed tomography (CT) and rotational angiography (RA) examinations for the diagnosis of pelvic trauma. In addition, this study aimed to compare the dose distributions between the two examinations. Surface and average fetal doses were estimated during CT and RA examinations using a pregnant phantom model and real-time
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Radioprotection issues in uraniferous minerals collections with reference to an actual case Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2024-03-06 Ilaria Cupparo, Luca Fedeli, Sandra Doria, Vanni Moggi Cecchi, Cesare Gori
Our work investigated the radioprotection implications associated with the possession of a collection of uraniferous minerals. Considering different scenarios, we developed (and applied to an actual collection) specific formulas for radiation doses evaluation. We discussed the shielding necessary to reduce the gamma irradiation down to the required values. A mathematical model was developed to estimate
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Dosimetric comparison of O-ring versus conventional C-arm linear accelerator for volumetric modulated arc therapy (VMAT) of head and neck cancer and carcinoma cervix patients Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2024-03-05 Vibhor Patodi, Tej P Soni, Dinesh K Singh, Nidhi Patni, Naresh Jakhotia, Vineeth Chittappurath, Rajkamal Kuyyanangadan, Ashna Jenny, Elumalai Kanniyappan, Anil K Gupta, Tara C Gupta, Harish Singhal, Thirumoorthy Natrajan, Farzana S Kather
The objective of this study is dosimetric comparison between the O-ring Halcyon and C-arm Clinac iX linac for volumetric modulated arc therapy (VMAT) plans for head & neck (H&N) cancer and carcinoma cervix patients. Total 60 patients of H&N cancer and carcinoma cervix were enrolled prospectively from March 2021 to March 2023. VMAT plans with 6 MV photons for Halcyon and Clinac iX were generated and
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CPU–GPU-coupled acceleration method for point flux calculation in Monte Carlo particle transport Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2024-02-27 Pu Yanheng, Wu Zhen, Hao Yisheng, Gao Shenshen, Qiu Rui, Zhang Hui, Li Junli
In Monte Carlo particle transport simulations, point flux tallying is a variance reduction technique that performs well with small detectors and finds broad application in source–detector problems and local point dose calculations. However, its use in large-scale point flux tallying computation adds substantial computational time. To address this issue, we propose a CPU–GPU-coupled acceleration method
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On the robustness of detective quantum efficiency within the limits of IEC 61267 RQA standard radiation qualities Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2024-02-27 Stefan Pojtinger
IEC 61267 allows a certain leeway regarding the establishment of radiation qualities in order to enable the use of X-ray tubes having different anode angles and inherent filtrations. This allowance has a direct impact on the calculation of the detective quantum efficiency and may potentially complicate any comparison of different imaging detectors based on this quantity. This work investigates this
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Monte Carlo calculated photon interaction coefficients for several body tissues Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2024-02-08 Aycan Sengul, Ahmet Bozkurt
Absorption of energy in body tissues because of radiation interactions may induce harmful outcomes such as cancer and hereditary effects due to a variety of damages in the integrity and activity of the cells. This study presents Monte Carlo calculated $\boldsymbol{\mu} /\boldsymbol{\rho}$, ${\boldsymbol{\mu}}_{\boldsymbol{en}}/\boldsymbol{\rho}$ and ${\boldsymbol{\mu}}_{\boldsymbol{tr}}/\boldsymbol{\rho}$
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Glandular doses and diagnostic reference levels (DRLs) for Saudi breast cancer screening programme (2012–2021) Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2024-02-07 Salman M Albeshan, Ahmad A Alhulail, Maha M Almuqbil
The aim of this study was to report the diagnostic reference levels (DRLs) corresponding to different compressed breast thickness (CBT) ranges. To achieve this, mammographic examinations with 187,788 exposures were analysed. The mean average glandular (AGD) dose was calculated per view, examination, and center. Moreover, the DRL values corresponding to different CBT ranges were reported. The result
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Measurement of Hp(10), Hp(3) and Hp(0.07) to medical staff in endoscopic retrograde cholangiopancreatography, using thermoluminescence dosimetry Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2024-02-07 Ava ZarifSanayei, Sedigheh Sina
Endoscopic retrograde cholangiopancreatography (ERCP) is widely used in the diagnosis and treatment of pancreatic and bile duct disorders. The procedure is performed under the guidance of fluoroscopy. This study aims to investigate the dose received by staff in the Endoscopy Department of AbuAli Sina Medicine and Organ Transplant Hospital in Shiraz. The dosimetry was performed using thermoluminescent
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Comparison of the performance of two thermoluminescent dosimetry systems for the personal dose-equivalent Hp(10) measurement Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2024-02-07 Fengfan Lu, Wei Li, Jing Jin, Kui Li, Jinghua Zhou
The performance of two thermoluminescent dosimetry systems (RGD-3D and RE2000) manufactured in China and Finland was compared. Both of these dosimetry systems demonstrated satisfactory results as their performance met the requirements of the standard. The two dosimetry systems showed similar performance in the energy response. The RGD-3D dosimetry system performed better in nonlinear response, minimum
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A comparative study of boost dose delivery techniques in breast cancer radiotherapy optimising efficacy and minimising toxicity Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2024-01-26 Khalid El Ouardi, Mustapha Zerfaoui, Yassine Oulhouq, Karim Bahhous, Abdeslem Rrhioua, Dikra Bakari
The present study aims to compare three techniques for delivering a boost absorbed dose: conventional reduced tangential (3D), volumetric modulated arc therapy (VMAT) and fields forward-planned technique boost (3DF). The study included 15 postoperative breast cancer patients who received a boost absorbed dose following breast-conserving surgery. The conformity index and homogeneity index were used
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Optimizing chemical-induced premature chromosome condensation assay for rapid estimation of high-radiation doses Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2024-01-20 Ryo Nakayama, Donovan Anderson, Valerie Swee Ting Goh, Yohei Fujishima, Kaito Yanagidate, Kentaro Ariyoshi, Kosuke Kasai, Mitsuaki A Yoshida, William F Blakely, Tomisato Miura
In the event of exposure to high doses of radiation, prompt dose estimation is crucial for selecting appropriate treatment modalities, such as cytokine therapy or stem cell transplantation. The chemical-induced premature chromosome condensation (PCC) method offers a simple approach for such dose estimation with significant radiation exposure, but its 48-h incubation time poses challenges for early
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A preliminary study on determination of radioactivity levels and estimation of the annual effective dose in dried fruits consumed in Albania Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2024-01-10 Erjon Spahiu, Manjola Shyti, Irma Bërdufi
This work aimed to support Albania’s food safety monitoring regime. In this context, the natural and artificial radioactivity was measured in 20 samples of dried fruits collected randomly in different markets of Tirana. The activity concentration of 40K, 226Ra, 232Th and 137Cs was determined by using the high-purity germanium detector. The maximum values of activity concentration in dried fruits were
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The effect of cooling rate on the precision of measurement of glow peak 5 in the thermoluminescence of LiF:Mg,Ti (TLD-100) Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2024-01-10 Yogev Bokobza, Shlomo Biderman, Yigal Shalom Horowitz, Leonid Oster, Ilan Eliyahu, Alex Shapiro, Dmitry Nemirovsky, Galina Reshes, Beny Herman, Hezy Einav
The effect of natural rapid cooling and oven slow cooling on the precision of thermoluminescence measurements of LiF:Mg,Ti is investigated. Three separate series of measurements resulted in average precisions of 5.1 and 5.0%, respectively. However, the highest precision of 1.7% (1 SD) was achieved for an oven-cooled material.
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Exceeding radiation thresholds for cataract induction in diagnostic imaging: a paediatric case report Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2024-01-10 Amanda Alison Perdomo, Mohamed Khaldoun Badawy, Cristina Mignone, Jake Cameron Forster
This case report investigates the radiation dose received by a paediatric patient with a ventricular assist device who underwent four non-contrast brain computed tomography (CT) scans, two brain perfusion CT scans and two head angiographic CT scans. The total estimated absorbed dose to the lens of the eye is above the 500 mGy radiation-induced cataract threshold. It is recommended that this patient
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Exposure frequency and radiation dose from CT examinations in Huaian Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2024-01-10 Binbin Huo, Xiaomin Chen, Zhiyong Xu, Dongdong He, Jin Wang
This study quantified the exposure frequency and established the local diagnostic reference levels (DRLs) for the most common computed tomography (CT) examinations. A combined method census and sampling survey was used to quantify both frequency and radiation dose of CT examinations. Data were acquired through Picture Archiving and Communication System (PACS) or Radiology Information System (RIS).
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Radiation dose to breast during digital mammography in Tanzania Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2024-01-10 Elisha Edmund, Mary Kamuzora, Wilbroad Muhogora, Patrick Ngoya, Alex Muhulo, Assad Amirali, Atumaini Makoba, Wilson Ngoye, Justin Ngaile, Salma Majatta, Miguta Ngulimi, Salome Mwambinga, Tunu Kaijage
The aim of this study was to evaluate the mean glandular dose (MGD), to assess the potential for optimization, and to propose diagnostic reference levels (DRLs). MGD was estimated from air kerma measurements and patient information collected during mammography examinations. The 75th percentile values were determined as the third quartile of the median MGD values for all hospitals, and DRLs set as 75th
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Reconstruction of organ doses for patients undergoing computed tomography examinations in Canada 1992–2019 Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2024-01-08 Choonsik Lee, Brian Moroz, Christopher Thome, Katherine Gaudreau, Pirouz Emami, Mark P Little
We derived the first comprehensive organ dose library for Canadian pediatric and adult patients who underwent computed tomography (CT) scans between 1992 and 2019 to support epidemiological analysis of radiation risk. We calculated organ absorbed doses for Canadian CT patients in two steps. First, we modeled Computed Tomography Dose Index (CTDI) values by patient age, scan body part, and scan year
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Assessment of gamma absorbed doses and radiological risk indexes from soil radioactivity around the phosphate area in south Tunisia Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2024-01-08 Sonia Machraoui, Salam Labidi, Mohan M Purushotham
Human beings are constantly exposed to the radiations coming from the environment. This work assesses the radiological hazards of natural radioactivity in soil samples taken at four locations around the phosphate area in south Tunisia. Concentrations of primordial radionuclides were measured by gamma spectrometer using an HPGe detector. The overall mean values of 40K, 226Ra and 232Th concentrations
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Gamma irradiation system’s performance tests Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2024-01-08 Azamat Taubaldiev, Miloš Živanović
This study reviews the performance analysis of a 137Cs irradiation system that has recently been installed in the laboratory of Uzbek National Institute of Metrology. The laboratory is responsible for calibrating calibration facilities and for calibrating most protection level radiation monitoring instruments used in medical, nuclear, industrial and academic settings in Uzbekistan. This system employs
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Occupational internal monitoring in nuclear medicine service of Sainte-Anne military hospital: previous considerations and results Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-12-26 Héloïse Gervot, Wilfried Letessier, Jérôme Loess, Christopher Bayle-Escurat, Denis Métivier, Dominique Saurat, Emilie Jamet-Anselme
The Nuclear Medicine Department of Sainte-Anne military hospital in Toulon uses 99mTc, 123I and 18F unsealed sources to provide therapeutic and diagnostic care. For a few years, only ambient air and surface monitoring were performed to check the absence of internal contamination risk for workers. To verify this risk assessment hypothesis, confirmatory monitoring programme including in vivo and in vitro
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Development and characterisation of a plastic scintillator dosemeter in high-energy photon beams Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-12-21 Janatul M Wahabi, N M Ung, Ghafour A Mahdiraji, Jeannie H D Wong
The radioluminescent (RL) dosemeter is excellent for real-time radiation measurement and can be used in various applications. A plastic scintillator is often the choice sensor because of its size and tissue equivalency. This study aims to characterise a novel plastic scintillator irradiated with high-energy photon beams. An RL dosimetry system was developed using the plastic scintillator. The RL dosimetry
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Influence of short-lived radioiodines other than 131I on screening direct thyroid measurements with TCS-172 NAI(TL) survey meters Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-12-18 Kotaro Tani, Eunjoo Kim, Kazuaki Yajima, Masayuki Naito, Nobuhito Ishigure, Tiffany Beaumont, David Broggio, Osamu Kurihara
In a nuclear emergency, one of the actions taken for the sake of public is to monitor thyroid exposure to radioiodines. Japan’s Nuclear Regulation Authority recently published a report on such monitoring and proposed direct thyroid measurements with conventional NaI(Tl) survey meters (e.g. Hitachi model TCS-172) as a primary screening method. A previous study proposed screening levels (SLs) used in
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Estimation of diagnostic reference levels for pediatric head computed tomography in Yaoundé Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-12-13 Eddy F Kamdem, Alain J Fotue, Brice B F Kouam, Serge Abogo, Odette N Samba
The diagnostic reference levels (DRLs) are determined from dosimetry studies to compare and manage patient doses in medical imaging procedures. The aim of this work was to establish the first DRLs for pediatric patients during the most common computed tomography (CT) procedures in Yaoundé, Cameroon during routine head CT examinations to know how to improve our clinical practice tomorrow. The sample
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Analysis of internal gamma-ray dose to the public from brick as building material in Tamil Nadu, India Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-12-11 Seenuvasan Karthikayini, Ananthanarayanan Chandrasekaran
Natural radioactivity due to 238U, 232Th and 40K in brick samples from Tamil Nadu was determined using gamma-ray spectrometry. The mean activity concentrations of 238U, 232Th and 40K, 69 ± 6, 62 ± 6 and 462 ± 23 Bq kg−1, are slightly greater than the world recommended limits of 35, 45 and 420 Bq kg−1, respectively, and they are compared with a similar work carried out across the world. The radiological
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Energy spectrum measurement of scattered X-rays during IVR procedure Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-12-01 Joma Oikawa, Jun Sakai, Yusuke Fujiwara, Kota Tsurusawa, Daisuke Shimao, Hiroyuki Date, Hiroyuki Sugimori
With the increase of the number of interventional radiology (IVR) procedures, the occupational exposure of operators and medical staff has attracted keen attention. The energy of scattered radiation in medical clinical sites is important for estimating the biological effects of occupational exposure. Recent years have seen many reports on the dose of scattered radiation by IVR, but few on the energy
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Safety assessment of wireless chargers for electric vehicles considering thermal characteristics. Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-30 Wenting Mou,Mai Lu
This study employs the transient finite element method and electromagnetic heat transfer theory to assess the heating generated by high-power wireless chargers during electric vehicle charging. The analysis includes simulating and analyzing the temperature distribution of two different types of shielding plates of the wireless charger and the specific absorption rate (SAR) and head temperature rise
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A new proposed procedure for calibrating personal dosemeters for X and gamma radiations, based on Hp(30)water. Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-30 Kamal Bouzegzi,Akila Amroun-Frahi,Toufik Medjadj,Ammar Herrati
Recently, a new operational quantity Hp(30)water has been proposed to replace Hp(10). This paper describes a new proposed procedure for calibrating personal dosemeters, for X and gamma radiations, in terms of this new quantity Hp(30)water. Compared to the current procedure based on Hp(10), the proposed procedure requires fewer steps and it is easier to implement. Indeed, this new procedure is based
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Assessment of organ doses, peak skin doses and effective doses in patients undergoing anterior cervical discectomy and fusion utilising VirtualDose-IR software Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-29 Vasileios Metaxas, Christos Dimitroukas, Fotios Efthymiou, Harry Delis, George Gatzounis, Fotios Tzortzidis, Petros Zampakis, Andreas Theofanopoulos, Constantine Constantoyannis, George Panayiotakis
In this study, the effect of patient- and procedure-related parameters on organ doses (ODs), peak skin dose (PSD) and effective dose (E) during anterior cervical discectomy and fusion (ACDF) was evaluated. Patient- and procedure-related parameters, as well as fluoroscopy time, kerma-area product (KAP), cumulative air-kerma (Kair) and incident Kair, were analysed for 50 ACDF procedures performed with
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Metrology supporting the European regulation for radiation protection Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-27 João G Alves, Margarida C Caldeira, Annette Röttger, Behnam Khanbabaee, Christelle Adam-Guillermin, Teemu Siiskonen, Miloš Živanović, Amra Šabeta, Denis Glavič-Cindro
The European Association of National Metrology Institutes (EURAMET) within its research programme European Metrology Programme for Innovation and Research (EMPIR) funded project EMPIR 19NET03 supportBSS that contributes to the establishment of a European Metrology Network (EMN) for Radiation Protection (RP). The EMN-RP was established in September 2021 with the intent to work as a meeting point for
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Effectiveness of low tube voltage scan in the exposure dose for lenses during paediatric thoracic CT examination: anthropomorphic phantoms study Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-21 Takanori Masuda, Masao Kiguchi, Chikako Fujioka, Takayuki Oku, Toru Ishibashi, Yasushi Katsunuma, Takayasu Yoshitake, Shuji Abe, Kazuo Awai
To determine whether using lower-tube voltage reduces the scattered dose for the lens during paediatric thoracic computed tomography (CT). Two paediatric anthropomorphic phantoms (ATOM Phantom, CIRS, Norfolk, Virginia, USA) representing a newborn and 5-year-old were placed on the gantry of CT scanner, and optically stimulated luminescence dosemeters were placed on the left and right lenses, in front
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Administered dosage and effective dose estimated from 81Rb-rubidium hydroxide for lung ventilation scintigraphy using 81mKr noble gas Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-21 Takashi Kamiya, Takashi Iimori, Yukito Maeda, Nobuhiro Yada, Naoya Hayashi, Harumi Iguchi, Masataka Narita
The aim of this study was to estimate the administered dosage of 81mKr noble gas as calculated by the radioactivity of 81Rb-rubidium hydroxide (81RbOH). The administered dosage was regarded as the total amount of 81mKr noble gas. The radioactivity of 81mKr was calculated using the radioactivity of 81RbOH at the examination, the beginning of inhalation, the inhalation duration and the attenuation volume
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Radiation exposure during CT procedures in Tanzania Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-20 Wilson Ngoye, Mussa Ndukeki, Wilbroad Muhogora, Ahmed Jusabani, Justine Ngaile, Patrick Ngoya, Richard Sungura, Cecilia Ngatunga, Nazrina Hashmi, Hilda Makungu, Erick Onoka, Mudassir Amirali, Abdallah Kileo, Atumaini Makoba, Alex Muhulo, Miguta Ngulimi, Vitus Balobegwa, Elisha Edmund, Ali Masoud, Machibya Matulanya
The aim of this study was to evaluate optimisation status during common computed tomography (CT) procedures by determining values of volume computed tomography dose index (CTDIvol) and dose-length product (DLP) per examination. Patient and exposure data were collected from the CT console during various CT procedures. The results show that variations in CTDIvol and DLP values were mainly because of
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Long-term study (1987-2023) on the distribution of 137Cs in soil following the Chernobyl nuclear accident: a comparison of temporal migration measurements and compartment model predictions. Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-16 Ioannis Kaissas,Alexandros Clouvas,Marios Postatziis,Stelios Xanthos,Michalakis Omirou
After the Chernobyl accident, a designated area of ~1000 m2 within the University farm of Aristotle University of Thessaloniki in Northern Greece was utilized as a test ground for radioecological measurements. The profile of 137Cs in the soil was monitored from 1987 to 2023, with soil samples collected in 5-cm-thick slices (layers) down to a depth of 30 cm. The mean total deposition of 137Cs in the
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Correction to: Development of ring radiation dosemeters using 3D printing. Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-16
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γ-H2AX and phospho-ATM enzyme-linked immunosorbent assays as biodosimetry methods for radiation exposure assessment: a pilot study. Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-16 Dwi Ramadhani,Devita Tetriana,Sofiati Purnami,Viria Agesti Suvifan,Iin Kurnia Hasan Basri,Teja Kisnanto,Tiara Andalya Oktariyani,Dira Syafira,Muhamad Yasin Yunus,Tomisato Miura,Mukh Syaifudin,Retno Widowati
In the event of a radiological incident, a fast and accurate biological dosimetry (biodosimetry) method for evaluating people who have been potentially exposed to ionising radiation is crucial. Among the many biodosimetry methods available, the immunodetection of phosphorylated H2AX (γ-H2AX) stands as a promising method to be used in the triage of patients exposed to radiation. Currently, the most
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A comparison of different detection techniques for 137Cs measurements of cattle in vivo. Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-16 Miluše Bartusková,Anna Selivanova,Irena Malátová,Jiří Hůlka,Jan Škrkal,Jan Rosmus,Alena Kapyltsova,Petr Rulík
Agricultural lands with farm animals (e.g. cattle) can be significantly affected by radioactive contamination following nuclear or radiation accidents. In order to optimise the techniques for measuring 137Cs in contaminated cattle, selected radiation detectors have been tested and calibrated using volumetric radiation sources. In addition, a mathematical phantom of a cow was created within Monte Carlo
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Utility of lower tube voltage scans in reducing exposure of healthcare workers within computed tomography room to scattered radiation. Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-16 Shinichi Arao,Takanori Masuda,Takayuki Oku,Atsushi Ono,Yasuhiko Okura
The aim of this study was to estimate the effect of tube voltage on the scattered dose in a computed tomography (CT) room. To this end, we conducted experiments using anthropomorphic phantoms and a CT scanner at different tube voltages during CT. The scattered dose was measured using an electronic pocket dosemeter at 50-cm intervals from the centre of the gantry. The structure of the CT room was measured
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Operator radiation exposure during radioembolisation of the liver: transfemoral versus transradial access using real-time dose monitoring. Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-16 Federico Pedersoli,Jieming Fang,Edward Boas,John J Park
In this study, operator radiation exposure is compared utilising transradial access (TRA) versus transfemoral access (TFA) during transarterial radioembolisation (TARE) of liver tumors. Patients who underwent Y90 TARE between May 2017 and April 2018 were included. Electronic medical records and interventional data were collected and the following parameters evaluated: technical success, fluoroscopy
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Soil surface roughness impacts the risk arising from a hypothetical urban radiological dispersive device activation. Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-15 Carlos E S Bonfim,Vitor W L Silva,Lucas D Rodrigues,Rodrigo C Curzio,Avelino Santos,William H S Profeta,Larissa R P Xavier,Luiz A de Mello,Ricardo M Stenders,Edson R Andrade
This study considers a deliberate hypothetical release of radioactive material over an inhabited urban zone. The event is initiated by the activation of a radiological dispersion device. The main threat is the deposition of radioactive material onto the soil's surface. The radiation represents the threat-defining risks, which depend on the main variables, i.e. soil surface roughness, sex, age of the
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Development of DynamicMC for PHITS Monte Carlo package Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-14 Hiroshi Watabe, Tatsuhiko Sato, Kwan Ngok Yu, Milena Zivkovic, Dragana Krstic, Dragoslav Nikezic, Kyeong Min Kim, Taiga Yamaya, Naoki Kawachi, Hiroki Tanaka, A K F Haque, M Rafiqul Islam, Mehrdad Shahmohammadi Beni
Previously, we have developed DynamicMC for modeling relative movement of Oak Ridge National Laboratory phantom in a radiation field for the Monte Carlo N-Particle package (Health Physics. 2023,124(4):301–309). Using this software, three-dimensional dose distributions in a phantom irradiated by a certain mono-energetic (Mono E) source can be deduced through its graphical user interface. In this study
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Survey on reference dosimetry practice in Hokuriku region, Japan Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-11 Naoki Kinoshita, Akihiro Takemura, Akitane Oosaka, Nobuyuki Shirosaki, Tetsuya Tsujikawa
This study aimed to obtain reference dosimetry practices for flattened photon and electron beams. A questionnaire survey on these practices was sent to 37 facilities that performed radiotherapy using these beams in Fukui, Ishikawa, Niigata and Toyama, Japan. The survey comprised equipment (dosemeters, water phantoms, thermometers, barometers and hygrometers) and procedures for reference dosimetry (water
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The influence of some rare earth elements as neutron absorbers on the inception of Oklo natural nuclear reactors Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-07 Salah-Eddine Bentridi, Benoît Gall, Alexis Nuttin, Hiroshi Hidaka
A totally reflected core model was built to estimate the infinite multiplication factor ${{k}}_{{\infty}}$ as a parametric function using MCNP code. Thus, it was possible to evaluate the influence of a specific physical parameter on the criticality occurrence of the Oklo phenomenon, namely initial Poisons (IP: Gd, Sm and Nd). In fact, these rare earth elements, prior to criticality occurrence in Oklo
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Some observations on perceptions of radiation risks in the context of nuclear power plant accidents Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-07 James Mc Laughlin
As highlighted by public reactions to accidents at nuclear plants in the past, such as those that occurred in Chernobyl (1986) and Fukushima (2011), and from numerous opinion surveys, there are considerable differences or gaps between how the public and radiation experts perceive the risks from radiation. Even within the community of experts, radiation risk perception differences can be present. The
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From routine sample measurements in CEA to the Oklo phenomenon Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-07 Jean-François Dozol
In 1972, before shipping natural uranium to the USSR for enrichment operations in 235 U, the analysts at Pierrelatte plant noted a slight deficit in 235U: 0.7171 instead of 0.7202. The Direction des Productions of the CEA launched a vast campaign of analyses for the different mines exploited, at all stages of the elaboration of uranium; for this analysis campaign, the Direction des Productions relied
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Development of calculation tool for iodine 131 biodistribution depending on the aerosol particle distribution Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-07 Kazuki Iwaoka, Eliza B Enriquez, Yuki Tamakuma, Masahiro Hosoda, Shinji Tokonami, Chitho P Feliciano, Reiko Kanda
Radiation damage to tissues depends on radiation exposure levels. Therefore, we have studied accurate estimations of radiation exposure levels so far. Recently, we developed a tool that can calculate the respiratory tract deposition of radionuclides based on polydisperse particle size distribution. As a next step, there is a need for a new calculation tool for the biodistribution of radionuclides because
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True and spurious anomalies in ambient dose rate monitoring Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-07 Peter Bossew, Petr Kuča, Jan Helebrant
Ambient dose rate surveys reveal zones of an elevated dose rate. As the observation results from two physical processes—the ‘true’ process in nature that one wants to assess and the observation process that consists of measuring under certain conditions—an observed anomaly can have its cause in either process. Anomalous effects rooted in the observation process are called spurious. Distinction between
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Radiation exposure in interventional cardiology: extremities doses Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-07 Cyrine El Hassane, Abdelhai Ben Ali, Nabil Bendaoud, Ghania Medkour Ishak Boushaki
X-rays are widely used in interventional cardiology (IC). Medical staff is exposed to ionising radiations with difficulties to accurately estimate the absorbed dose, on the other hand, it is well known that eye lens and extremities are the most exposed. In most IC units, radiological monitoring is performed by measuring the personal dose equivalent with a dosemeter worn under the operator’s apron.
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Evidence of fast neutron operating in Oklo Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-07 Hiroshi Hidaka, Salah-Eddine Bentridi, Benoit Gall
Since the discovery of the first reactor zone (RZ) at the Oklo uranium deposit in 1972, many isotopic studies have been performed to understand the mechanism of the operation as fission reactors and to trace the migration behaviors of fissiogenic isotopes produced in the Oklo RZs. As the representative parameters to characterize the operating conditions of RZs, neutron fluence generated in RZ, duration
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Improvement of spectral analysis using a NaI(Tl) scintillation spectrometer to evaluate ambient gamma dose rates from primordial radionuclides Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-07 Yasutaka Omori, Atsuyuki Sorimachi, Masahiro Hosoda, Sarata Kumar Sahoo, Norbert Kavasi, Osamu Kurihara, Shinji Tokonami, Tetsuo Ishikawa
In-situ measurements by gamma-ray spectrometry using a NaI(Tl) scintillation spectrometer are performed to discriminate primordial and artificial radionuclides contributing to ambient gamma dose rates in the living environment to quantify prolonged influence of nuclear accidents. However, low energy resolution of the spectrometer causes poor discrimination in the measurements at high-dose-rate points
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Site-specific dose conversion factors for radon progeny based on ambient aerosol characteristics in an outdoor environment and a tourist cave Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-07 Yuki Tamakuma, Mizuki Kiso, Aoi Sampei, Hiroki Hashimoto, Chutima Kranrod, Masahiro Hosoda, Sohei Ooka, Masahide Furukawa, Shinji Tokonami
Site-specific Dose Conversion Factors (DCFs) for radon progeny were estimated based on the aerosol measurement results in an outdoor environment and a tourist cave. The Activity Median Diameter (AMD) and unattached fraction were measured and used to calculate the effective dose per unit intake of radon progeny. The AMDs in the outdoor environment was in the range of 0.24–0.71 μm with the unattached
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Estimation of radiation dose due to thoron and progeny inhalation in high background natural radiation area of Odisha, India Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-07 Rakesh C Ramola, Mukesh Prasad, Sarata K Sahoo, Shinji Tokonami
Results of the preliminary measurements of indoor radon, thoron and progeny concentrations showed very high values of thoron concentrations in the eastern coastal region of Odisha, India. Therefore, measurements of thoron and its progeny concentrations were extended to a larger number of houses in this area for the assessment of the radiation dose received by the public. The measured values of thoron
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The Oklo phenomenon, the discovery, first questions and first answers Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-07 François Gauthier-Lafaye, Benoît Gall, Salah-Eddine Bentridi
The discovery in Nature of 16 reactions zones where sustained fission chain reaction occurred 1.95 b.y ago raised numerous questions in many scientific fields. Fifty years later, some of them are still unanswered. This article recalls the history of this discovery and the scientific facts before discussing the present-day understanding of this complex phenomenon.
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Parallels between natural Oklo reaction zones and industrial reactors dynamics Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-07 Benoît Jean-Paul Gall
The first man-made nuclear reactor was developed by Fermi and collaborators at the University of Chicago and reached criticality in December 1942. This was the confirmation that men were able to use sustained fission reactions in order to produce energy. Following this success, nuclear reactors studies gave rise to several families of reactors corresponding to different orientations and technical choices
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Calibration experiments for radon in drinking water measurements using portable-type electrostatic-collection radon monitors Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-07 Masahiro Hosoda, Yasutaka Omori, Hiroki Hashimoto, Maho Matsumoto, Yumi Yasuoka, Tetsuya Sanada, Yuki Oda, Mizuki Kiso, Aoi Sampei, Chutima Kranrod, Hirofumi Tazoe, Naofumi Akata, Yasuyuki Taira, Yuki Tamakuma, Ryohei Yamada, Hiromi Kudo, Mayumi Shimizu, Shinji Tokonami
Portable-type electrostatic-collection radon monitors (RAD7) are often used for in-situ measurements of radon in water. In this study, we evaluated the calibration factors and their uncertainties for two RAD7 monitors based on comparative measurements with the liquid scintillation counting method. In the first experiment, we found that both RAD7 monitors had relatively large uncertainties due to leakage
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The presence of toxic heavy metals in tuna fishes from Laccadive sea and concomitant health risk Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-07 Aishath Nadhiya, Mayeen U Khandaker, Sultan Mahmud, Wan H Abdullah
Concentrations of heavy metals in Yellowfin and Skipjack tuna fishes from the Laccadive sea were determined by inductively coupled plasma optical emission spectroscopy (ICP-OES) to evaluate the human health hazards via their consumption. The samples were collected from different atolls of Maldives to ensure a good representation of sample distribution. The metal concentration in tuna fish is found
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Distribution of naturally occurring radionuclides and gamma dose rate assessment in the soils of high background natural radiation area Odisha, India Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-07 Nimelan Veerasamy, Sarata K Sahoo, Thennaarassan Natarajan, Kazumasa Inoue, Masahiro Fukushi, Rakesh C Ramola
A study on the activity concentration of primordial radionuclides 226Ra, 232Th and 40K was carried out on the surface soil samples collected from the coastal villages between Chhatrapur and Gopalpur regions of high background natural radiation area Odisha, India, using high purity germanium gamma spectroscopy. The mean activity concentrations of 226Ra, 232Th and 40K were found to be 231, 1692 and 250
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Norm in cultivated honey in Malaysia and concomitant effective dose to consumers Radiat. Protect. Dosim. (IF 1.0) Pub Date : 2023-11-07 Mayeen U Khandaker, Nurul S B Zayadi, Siti Fairus A Sani, David A Bradley, Hamid Osman, Yasser Alzamil, Meshari Almeshari, M I Sayyed, Abdelmoneim Sulieman
Present study concerns the radiological character of Malaysian honey. A total of 18 samples (representative of the various most common types) were obtained from various honey bee farms throughout the country. Using a high-purity germanium γ-ray spectroscopic system, the samples were analysed for the naturally occurring radionuclides 226Ra, 228Ra and 40K. The respective range of activities (in Bq/kg)