-
IDAC-ALPHA: AN ALPHA DOSIMETRY SOFTWARE FOR NORMAL ORGANS AND TISSUES Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-04-12 M Andersson, A Kluge, T Meyer, E Koumarianou, S Mattsson
Radiopharmaceuticals have been used for the treatment of various forms of cancer since the 1940s. In recent years, the advantages of alpha emitting radionuclides have emerged as a favourable treatment option. However, most alpha emitting radionuclides have long decay chains with long-lived daughter radionuclides. This leads to uncertainties in the dosimetry for normal organs and tissues, when established
-
RADIATION EXPOSURE TO THE BACK WITH DIFFERENT TYPES OF APRONS Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-04-12 Seung Wan Hong, Tae Won Kim, Jae Hun Kim
Physicians and nurses stand with their back towards the C-arm fluoroscope when using the computer, taking things out of closets and preparing drugs for injection or instruments for intervention. This study was conducted to investigate the relationship between the type of lead apron and radiation exposure to the backs of physicians and nurses while using C-arm fluoroscopy. We compared radiation exposure
-
IMPROVING IMAGE QUALITY BY INCREASING THE AMOUNT OF LIGHT IN THE READING ROOM Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-04-12 Patrik Sund
Many standards and guidelines related to the use of medical displays require viewers to be in dark rooms. The purpose of this theoretical study was to examine the validity of some commonly used requirements in terms of image contrast and contrast stability in rooms with fluctuating illuminance. By using the grayscale standard display function (Dicom part 14), contrast was calculated for several combinations
-
Effective Dose in Pediatric Interventional Cardiology Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-04-09 S S Sarycheva
The aim of this study was to estimate the effective doses (EDs) to children undergoing pediatric interventional cardiology examinations in hospitals of St.-Petersburg, to calculate associated dose conversion coefficients (DCCs) and to investigate their dependence of different parameters of the various procedures. Basic parameters of pediatric cardiology examinations and patient doses were studied in
-
MINIMIZING THE EXPOSURE TO THE EYE LENS OF RADIOLOGIC TECHNOLOGISTS ASSISTING PATIENTS DURING CHEST X RAYS: A PHANTOM STUDY Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-03-26 Mitsuyoshi Y, Tomoya F, Hisaya S, et al.
AbstractAs chest x rays involve risks of patients falling, radiologic technologists (technologists) commonly assist patients, and as the assistance takes place near the patients, the eye lenses of the technologists are exposed to radiation. The recommendations of the International Commission on Radiological Protection suggest that the risk of developing cataracts due to lens exposure is high, and this
-
STUDY ON A SPECIFIC TEST METHOD FOR DOSIMETRIC CHARACTERIZATION OF ULTRA-WIDE DETECTOR COMPUTED TOMOGRAPHY Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-03-26 Lu H, Ye X, Zhang H, et al.
AbstractThe purpose of this study was to establish a specific test method for dosimetric characterization of wide-beam computed tomography (CT). For a wide beam, the dose distribution curve and the area of the curve were obtained by using pencil-like ionization chamber, a long CT dose profiler probe, a head phantom and a body phantom. The absolute dose conversion coefficient was multiplied to obtain
-
COMPARISON OF THE PERFORMANCE OF TWO OSL READERS FOR THE PERSONAL DOSE EQUIVALENT HP(10) MEASUREMENT Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-03-16 Njiki C, Ndah T, Ben Bolie G, et al.
AbstractTechnical performances of two optically stimulated luminescence readers including, a microStar reader and an Auto 200 reader both manufactured by Landauer, Inc. were studied by the National Radiation Protection Agency Dosimetry Laboratory using manufacturer and International Electrotechnical Commission requirements. The two reader tools demonstrated satisfactory results as they met all the
-
PATIENT-SPECIFIC DOSE ESTIMATES IN DYNAMIC COMPUTED TOMOGRAPHY MYOCARDIAL PERFUSION EXAMINATION Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-03-10 Sundell V, Kortesniemi M, Siiskonen T, et al.
AbstractThe study aimed to implement realistic source models of a computed tomography (CT) scanner and Monte Carlo simulations to actual patient data and to calculate patient-specific organ and effective dose estimates for patients undergoing dynamic CT myocardial perfusion examinations. Source models including bowtie filter, tube output and x-ray spectra were determined for a dual-source Siemens Somatom
-
ESTIMATION OF ENTRANCE SURFACE AIR KERMA IN DIGITAL RADIOGRAPHIC EXAMINATIONS Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-03-04 Kaushik C, Sandhu I, Srivastava A, et al.
AbstractPurpose: Contribution of radiation doses from medical X-ray examination to collective dose is significant. Unusually, high doses may increase the risk of stochastic effects of radiations. Therefore, radiation dose assessment was performed in 241 digital X-ray examinations in the study and was compared with published dose reference levels (DRLs). Methods: Entrance surface air kerma (ESAK) was
-
ASSESSMENT OF THE RADIOACTIVITY OF GAMMA EMITTERS IN BABY FORMULA FOR DIFFERENT AGE GROUPS AND BABY CEREAL CONSUMED IN JORDAN Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-03-04 Ababneh A, Jaradat B, Samarah Q, et al.
AbstractIn the present work, different brands of baby formula and cereal consumed in Jordan were analyzed for their radioactivity content. The activity concentrations of 40K varied with the designated age group in formula with the average concentrations being (in Bq/kg): 160.2 ± 33.5, 219.0 ± 35.0 and 265.2 ± 56.3 for the age groups of 0–6 months, 6–12 months and 1–3 years, respectively. 226Ra was
-
COMMITTED EFFECTIVE DOSE FROM NATURAL RADIONUCLIDES IN FARM-RAISED AND WILD CATFISH IN IBADAN, NIGERIA Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-02-27 Isinkaye M, Ajilu F, Ibikunle S, et al.
AbstractThere is extensive contamination of the aquatic environment when rivers and streams flow through areas of high human activities such as industrial cities and major towns. These contaminations may include enhanced background levels of naturally occurring radioactive materials resulting from rapid urbanization and other human activities. The natural radionuclides (40K, 238U (226Ra) and 232Th
-
Estimation of Thermal & Epithermal Neutron Flux and Gamma Dose Distribution in a Medical Cyclotron Facility for Radiation Protection Purposes Using Gold Foils and Gate 9 Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-04-06 Fouad A Abolaban, Mohammed A Alawi, Eslam M Taha, Ezzat Elmoujarkach, Essam M Banoqitah, Abdulsalam M Alhawsawi, Paolo De Maio, Gaetano Lopopolo, Anna Tolomeo, Vincenzo Dimiccoli, Andrew Nisbet
The aim of this study is to characterise the neutron flux generated directly behind targets used in medical cyclotrons. The characterisation process aims at determining the feasibility of using the generated neutrons for research purposes in neutron activation analysis. The study was performed by activating gold foils placed directly behind the cyclotron targets. The thermal and epithermal neutron
-
Assessment Of Whole Body, Skin and Eye Lens Doses of the Interventional Radiologists At Selected Hospitals in Iran Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-04-06 Z Danaei, S M Hosseini Pooya, E Jazayeri Gharehbagh, S Baradaran
High radiation doses to the body may lead to the stochastic/deterministic effects of ionizing radiation on the critical organs as well as causing the cataract in eye lens of the clinical staff in interventional radiology. In this study, the received doses of the eyes, skin and whole body of 38 clinical staff including physicians, residents, nurses and radiotechnologists in cardiac angiography departments
-
Determination of Natural Radioactivity and Radiological Hazard Associated with Sediments Sourced from Ogunpa River Channels, Ibadan, Nigeria Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-04-06 N N Jibiri, S O Egwu, N E Adesiji
The natural radionuclides content and radiological assessment of sediments of the Ogunpa waste-water channel were evaluated to ascertain the radiological safety of the sediments as a building material. The mean activity concentrations of 40K, 226Ra and 232Th in Bq kg−1 were found to be 171 ± 69, 11 ± 5 and 10 ± 4, respectively. The overall mean radium equivalent 29 ± 13 Bq kg−1 was <370 Bq kg−1 that
-
Personal Dosimetry Using Monte-Carlo Simulations For Occupational Dose Monitoring In Interventional Radiology: The Results Of A Proof Of Concept In A Clinical Setting Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-04-06 A Almén, M Andersson, U O’Connor, M Abdelrahman, A Camp, V García, M A Duch, M Ginjaume, F Vanhavere
Exposure levels to staff in interventional radiology (IR) may be significant and appropriate assessment of radiation doses is needed. Issues regarding measurements using physical dosemeters in the clinical environment still exist. The objective of this work was to explore the prerequisites for assessing staff radiation dose, based on simulations only.
-
MEASUREMENT OF THE ACTIVITY CONCENTRATIONS OF GAMMA EMITTING RADIONUCLIDES IN TOOTHPASTE SAMPLES AND ASSESSMENT OF THE CORRESPONDING ANNUAL EFFECTIVE DOSES Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-04-05 Anas M Ababneh, Qutad M Samarah
It is inevitable that we are exposed to radiation daily from various sources and products that we consume on daily basis. The use of toothpaste for oral hygiene is one of the most common daily practices by humans and yet very little data are available regarding its radiation content. In this work, we investigated the concentrations of gamma emitting radionuclides in toothpaste samples consumed in Jordan
-
PRACTICAL GUIDANCE ON THE REGULATORY MANAGEMENT OF RADIOACTIVE LIQUID DISCHARGES FROM MEDICAL, EDUCATIONAL AND RESEARCH LABORATORIES Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-04-05 E Carinou, C Housiadas
License applicants are often faced with the need to perform a radiological impact assessment study for the liquid discharges in public sewers, even for practices with short-lived isotopes used in medical, educational or research laboratories. The present paper addresses the regulatory management challenges in performing such assessments and provides a practical calculation toolbox that enables more
-
Assessment of Integrity and Lead-Equivalence of Shielded Garments Using Two-Dimensional X-ray Images from a Computed Tomography Scanner Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-04-01 T Kairn, S K Maxwell, J V Trapp, S B Crowe
Shielded garments are widely recommended for occupational radiation protection in diagnostic and interventional radiology. This study investigated a novel method for efficiently verifying shielded garment integrity while simultaneously acquiring data for lead-equivalence measurements, using two-dimensional topogram images from computed tomography (CT) scanners. This method was tested against more-conventional
-
Determination of Ra-226, Th-232, K-40 and Cs-137 Activities in Soils and Beach Sands and Related External Gamma Doses in Arikli Mineralization Area (Ayvacik/Turkey) Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-04-01 Gülcan Top, Yüksel Örgün, Ismail Ercüment Ayazlı, Murat Belivermiş, Zekiye Karacık, Györgyi Kampfl
Uranium mineralization areas may jeopardize public health and surrounding natural life. In the current study for radioactivity and geochemical analyses, 43 soil, 5 rock and 10 beach sand samples were collected in and around Arıklı (Ayvacık, Turkey) uranium mineralization area. Radioactivity levels in the soils (up to Ra-226: 629, Th-232: 240, K-40: 3669 Bq/kg) were found higher than the that of beach
-
Dose Conversion Coefficients from Monoenergetic Neutrons Computed with the MCNP6.2 Code in the VIP-Man Phantom Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-04-01 Stephen R McHale, Erin R Walker
Computational estimates of dosimetric quantities from external exposures to neutron fields are valuable to ongoing radiation protection studies that are of interest to US defense-focused organizations. Conversion coefficients for fluence-to-absorbed dose and fluence-to-effective dose were computed using version 6.2 of the Monte Carlo N-Particle® code (MCNP6.2) in the visible photographic man (VIP-Man)
-
The Concept of X-Ray Ct Dose Evaluation Method Using Radiochromic Film and Film-Folding Phantom Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-03-31 Nobuyoshi Tanki, Toshizo Katsuda, Rumi Gotanda, Tatsuhiro Gotanda, Shinya Imai, Yasuyuki Kawaji, Atsushi Noguchi, Tadao Kuwano, Hideki Fujita, Yoshihiro Takeda
In this paper, we propose a novel radiochromic film (RCF)-based computed tomography (CT) dosimetry method, which is different from the method based on CT dose index. RCF dosimetry using Gafchromic QA2 films was performed using two lengths of film-folding phantoms. The phantom was exposed to X-ray CT through a single scan, while the RCF was sandwiched between the phantoms. We analysed the dose profile
-
Should We Begin Regulating the Radiation Safety Of Cabinet X-Ray Systems? Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-03-31 Shuguang Zhai, Qingxiang Tian, Hongfang Wang, Yuxia Kong, Bin Bai, Limeng Cui
Radiation measurements were conducted at 22 cabinet X-ray systems in Beijing, China, between 2015 and 2019. The median dose rates in the closed-drapes position were 0.11, 0.14, 0.12, 0.14, 0.34 and 0.17 μGy h−1 at the operator position and 5 cm from the surface of the left side, right side, top, entrance and exit, respectively. When a scattering object was passed through the entrance/exit (open-drapes
-
Measurements of Seasonal Variations of Radioactivity Distributions in Riverine Soil Sediment of Ado-Odo Ota, South-West Nigeria: Probabilistic Approach Using Monte Carlo Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-03-29 Omeje Maxwell, O Adewoyin Olusegun, Emmanuel S Joel, Ijeh Ikechukwu B, A Timothy-Terhile Mary, E Okoro Emeka, Omeje Anne Uchechukwu, Bosede Ngozi Adeleye, Orosun Muyiwa Michael, Oha A Ifeanyi, Iyanuoluwa E Ogunrinola, F Ahuekwe Eze, M A Saeed
The radioactivity levels were measured using a hand-held gamma-ray survey meter and NaI (Tl) based gamma spectroscopy to evaluate the seasonal variation of radioactivity levels in the riverine area of Ado-Odo Ota. The measured iso-dose map reported higher gamma dose rate of 79 nGy/h, approximately 34% higher than the world average of 59 nGy/h. The values for U-238, Th-232 and K-40 activity levels ranged
-
Pulmonary Nodule Detection in Chest Ct Using a Deep Learning-Based Reconstruction Algorithm Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-03-16 C Franck, A Snoeckx, M Spinhoven, H El Addouli, S Nicolay, A Van Hoyweghen, P Deak, F Zanca
This study’s aim was to assess whether deep learning image reconstruction (DLIR) techniques are non-inferior to ASIR-V for the clinical task of pulmonary nodule detection in chest computed tomography. Up to 6 (range 3–6, mean 4.2) artificial lung nodules (diameter: 3, 5, 8 mm; density: −800, −630, +100 HU) were inserted at different locations in the Kyoto Kagaku Lungman phantom. In total, 16 configurations
-
Cosmic Radiation Exposure to the Australian Public Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-03-04 Brendan Tate, Julia Carpenter, Rick Tinker, Blake Orr
A component of natural background radiation is exposure to galactic cosmic radiation (GCR). Annual GCR doses to the Australian public at ground levels and at altitudes of commercial domestic and international flights were estimated using the cosmic radiation dose modelling tool CARI-6. The annual population weighted average dose to Australians from GCR was estimated to be 342 μSv, of which 14.7 μSv
-
Quantification of Pulmonary Pathology in Cystic Fibrosis–Comparison Between Digital Chest Tomosynthesis and Computed Tomography Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-03-04 C Meltzer, M Gilljam, J Vikgren, R R Norrlund, K Vult von Steyern, M Båth, Å A Johnsson
Purpose: Digital tomosynthesis (DTS) is currently undergoing validation for potential clinical implications. The aim of this study was to investigate the potential for DTS as a low-dose alternative to computed tomography (CT) in imaging of pulmonary pathology in patients with cystic fibrosis (CF). Methods: DTS and CT were performed as part of the routine triannual follow-up in 31 CF patients. Extent
-
Viewdex 3.0—Recent Development of a Software Application Facilitating Assessment of Image Quality And Observer Performance Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-03-04 Angelica Svalkvist, Sune Svensson, Tommy Hagberg, Magnus Båth
ViewDEX (Viewer for Digital Evaluation of X-ray Images) is an image viewer compatible with Digital Imaging and Communications in Medicine (DICOM) that has been especially designed to facilitate image perception and observer performance studies within medical imaging. The software was first released in 2004 and since then a continuous development has been ongoing. One of the major drawbacks of previous
-
Evaluation of Model-Based Iterative Reconstruction in Abdominal Computed Tomography Imaging at Two Different Dose Levels Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-03-04 E Hettinger, M-L Aurumskjöld, H Sartor, F Holmquist, D Svärd, P Timberg
The purpose of this study was to qualitatively evaluate recently introduced Model-based iterative reconstruction method (IMR) and routinely used iterative reconstruction algorithm iDose4 to investigate future dose reduction possibilities for abdominal CT exams. The study contained data from 34 patients who underwent abdominal CT in SkåneUniversityHospital Lund, Sweden. A low-dose scan (CTDIvol3.4 mGy)
-
Potential Exposure Levels From Broadcast Transmitters in Ghana Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-03-04 P Deatanyah, A Menyeh, J K Amoako, E K K Abavare, A Osei-Donkor, E Quarshie
The protection of man and his environment from undue exposure from radio frequency electromagnetic field requires identification of the location where exposures are likely to be higher than safe levels established by international safety standards. A wideband measurement with a spectrum analyzer and a log-periodic antenna in conjunction with the three-point spatial average method was used. The results
-
Mapping of Workplace Radiation Fields in Diagnostic Radiology Facilities Using Personnel Monitoring TLD Badges Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-03-04 Kshama Srivastava, Shatabdi Chakrabarty, Rajeshri Pai, S M Pradhan, Ajay Chaubey, T P Selvam, B K Sapra
The radiation protection programme is aimed at safe usage of radiation at workplace, ensuring minimum possible dose to radiation workers, patients and members of the public. Verification of the adequacy of protective measures in actual workplace is important, especially for diagnostic radiology facilities, as a substantial number of suspected overexposures are reported from these facilities. To address
-
Uptake Of 226Ra From Irrigation Water By Basil Crops Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-02-27 Ofer Aviv, Effi Tripler, Zohar Yungrais, Tomer Baziza, Dani Vaknin, Jean Koch
The transfer of 226Ra from irrigation water to basil crops was studied in field conditions. A dedicated basil plot was established and divided into test and control subplots irrigated with water having high (2.1 Bq L−1) and low (0.05 Bq L−1) activity concentrations of 226Ra, respectively. The experiment was performed over a period of 18 months during the autumn, winter and spring seasons, altogether
-
Annual Exposure of the Swiss Population From Medical Imaging In 2018 Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-02-27 Anaïs Viry, Julie Bize, Philipp R Trueb, Barbara Ott, Damien Racine, Francis R Verdun, Régis LeCoultre
Nationwide surveys on radiation dose to the population from medical imaging are recommended in order to follow trends in population exposure. The goal of the 2018 survey was to investigate the current exposure. The invoice coding information was collected in five university hospitals and large clinics. To improve the estimation of the effective dose delivered in computed tomography (CT), we collected
-
Naturally Occurring Radionuclides in Soil Samples of Bureti Sub-County of Kericho County Kenya Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-02-23 C K Rotich, N O Hashim, M W Chege, C Nyambura
The activity concentration of soil samples of Bureti sub-county was measured using thallium-activated sodium iodide detector. To ascertain the level of radiation hazard to the public, gamma radiation dose rates were also estimated. The average activity concentration due to 40K, 226Ra and 232Th for soil samples are 1164 ± 70, 106 ± 8 and 79 ± 5 Bqkg−1, respectively. An average dose rate of 145 ± 10
-
Indoor Radon Concentration and Annual Effective dose in 56 Radiation Areas at 34 Medical Institutions in South Korea Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-02-10 YoungSeok Ji, DongJin Kim, EunYoung Shin, ChanMin Dae, BaeWon Lee
This study aims to measure the indoor radon concentration (IRC) of 56 radiation areas at 34 medical institutions to assess their adequacy as required by the South Korean Ministry of Environment and international standards, and calculate the annual effective dose (AED) of individuals in radiation-related professions at each medical institution. The study was conducted for 9 months and the AED was calculated
-
CONDUCTION BAND-VALENCE BAND THEORY OF TL AND OSL: EMPHASIS ON DELOCALIZED TRANSITIONS AND EXPLANATION ON SOME UNUSUAL EFFECTS Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-01-13 Reuven Chen
We discuss some unusual thermoluminescence (TL) and optically stimulated luminescence effects. We focus on luminescence due to transitions of electrons or holes through the conduction or valence band, respectively. We deal with non-linear dose dependence and non-monotonic dose dependence and also dose-rate effects sometimes reported. Also, is discussed the sensitisation of a sample due to the combined
-
THERMOLUMINESCENCE DOSIMETRY (TLD) IN MEDICINE: FIVE ‘W’S AND ONE HOW Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-01-12 Tomas Kron, Peta Lonski, Eduardo G Yukihara
Thermoluminescence dosimetry (TLD) has a long history of applications in medicine. However, despite its versatility and sensitivity its use is anecdotally diminishing, at least in part due to the complexity and work intensity of a quality TLD service. The present paper explores the role of TLD in medicine using a common inquiry methodology (5W1H) which systematically asks ‘Who, What, When, Where, Why
-
OSL CHARACTERISTICS: THEORY AND EXPERIMENTS Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-01-12 Chruścińska A, Palczewski P.
AbstractFundamental effects such as the participation of crystal lattice vibrations should be taken into account while considering photo-ionisation in solids at measurement temperatures characteristic for dosimetric applications. The impact of these effects on the optically stimulated luminescence (OSL) can be recognised for example by changes in the optical cross-section of the trap with the stimulation
-
MICRODOSIMETRIC UNDERSTANDING OF DOSE RESPONSE AND RELATIVE EFFICIENCY OF THERMOLUMINESCENCE DETECTORS Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-01-09 Olko P, Bilski P.
AbstractLiF:Mg,Ti detectors show relative efficiency η for heavy charged particles significantly lower than one. It was for a long time not recognised that η varies also for electron energies and, as a consequence for photons. For LiF:Mg,Cu,P detectors measured photon energy response was named ‘anomalous’ because it differed significantly from the ratio of photon absorption coefficients. The decrease
-
THE UNIFIED INTERACTION MODEL: SIMULATIONS OF TL DOSE RESPONSE AND EXPERIMENTAL VERIFICATION OF INTENDED DOSE RESPONSE LINEARITY BY POSTIRRADIATION PHOTON EXCITATION Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-01-08 Ginzburg D, Oster L, Biderman S, et al.
AbstractThe Unified Interaction Model (UNIM) simulates the linear/supralinear dose response of the glow peaks of LiF:Mg,Ti (TLD-100) and other thermoluminescent materials and the dependence of the supralinearity on photon/electron energy. The UNIM is based on the radiation action of spatially correlated trapping centres (TCs) and luminescent centres (LCs), which results in localised (geminate) electron/hole
-
APPLICATIONS OF OPTICALLY STIMULATED LUMINESCENCE IN MEDICAL DOSIMETRY Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-01-07 Yukihara E, Kron T.
AbstractIf the first decade of the new millennium saw the establishment of a more solid foundation for the use of the Optically Stimulated Luminescence (OSL) in medical dosimetry, the second decade saw the technique take root and become more widely used in clinical studies. Recent publications report not only characterization and feasibility studies of the OSL technique for various applications in
-
DEVELOPMENTS IN THE USE OF THERMOLUMINESCENCE AND OPTICALLY STIMULATED LUMINESCENCE FROM MOBILE PHONES IN EMERGENCY DOSIMETRY Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-01-06 McKeever S, Sholom S, Chandler J.
AbstractProposed physical dosimetry methods for emergency dosimetry in radiological, mass-casualty incidents include both thermoluminescence (TL) and optically stimulated luminescence (OSL). Potential materials that could feasibly be used for TL and OSL dosimetry include clothing, shoes and personal accessories. However, the most popular target of study has been personal electronics, especially different
-
TRIBUTE TO MARKO MOSCOVITCH Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-01-06 Horowitz Y.
Professor Marko Moscovitch succumbed to pancreatic cancer on 30 January 2013 at the early age of 59. Marko was an exceptionally creative scientist combining highly productive careers in both academia and industry. He was also a charismatic individual and a tremendously popular teacher. Marko was born in Romania and like most immigrants to Israel in his youth he served in the Israeli Defense Forces
-
REVIEW OF QUANTITATIVE MECHANISTIC MODELS OF RADIATION-INDUCED NON-TARGETED EFFECTS (NTE) Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-01-05 Shuryak I, Brenner D.
AbstractQuantitative mechanistic modeling of the biological effects of ionizing radiation has a long rich history. Initially, it was dominated by target theory, which quantifies damage caused by traversal of cellular targets like DNA by ionizing tracks. The discovery that mutagenesis, death and/or altered behavior sometimes occur in cells that were not themselves traversed by any radiation tracks but
-
RELATIVE HCP THERMOLUMINESCENCE AND OPTICAL ABSORPTION EFFICIENCIES: THE DEMISE OF TRACK STRUCTURE THEORY Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2020-12-29 Eliyahu I, Oster L.
AbstractThe thermoluminescence relative efficiency, ηTST, of LiF:Mg,Ti and LiF:Mg,Cu,P following heavy charged particle irradiation is calculated using track structure theory and compared with experimental measurements. The calculations use both 60Co generated values of secondary electron dose response and values of the dose response at lower photon energies. In both materials there is poor agreement
-
MEASUREMENT OF RADON ACTIVITY CONCENTRATION IN UNDERGROUND WATER OF BURETI SUB-COUNTY OF KERICHO COUNTY KENYA Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2020-12-08 Rotich C, Hashim N, Chege M, et al.
AbstractThe activity concentration of radon in underground water of Bureti sub-county was measured using liquid scintillating counter device. The average radon activity concentration in all the water samples was 12.41 Bql−1. The maximum and minimum activity concentrations of radon were 22.5 and 4.57 Bql−1, respectively. In total, 53% of the total samples analysed had radon concentration levels above
-
AIRBORNE RADIOMETRIC MAPPING FOR NATURAL RADIATION ASSESSMENT OVER OKITIPUPA SOUTHEAST BELT OF THE BITUMINOUS SAND FIELD OF NIGERIA Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2020-12-15 Faruwa A, Qian W, Agbele A, et al.
AbstractAirborne radiometric data were used for natural radiation assessment with the view to assess its likely environmental and health impact, which is one of the major factors that may pose some dangers to both physical and biological components especially during the exploitation of bitumen and also use the assessment as a baseline study that could be useful in planning appropriate environmental
-
KINETIC SIMULATIONS OF THE THERMOLUMINESCENCE CHARACTERISTICS OF LIF:MG, TI INCORPORATING LOCALISED AND DELOCALISED RECOMBINATION Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2021-01-13 Eliyahu I, Oster L.
ABSTRACTKinetic simulations of the thermoluminescence characteristics of LiF:Mg, Ti are reviewed in the framework of conduction band/valence band models. Delocalised recombination models have been mainly applied to the simulation of glow peak shapes, although comparison with experimental data has proven difficult if not impossible due to the scarcity of materials with demonstrably proven ‘single-peak’
-
AN INTERVENTIONAL CARDIOLOGY INVESTIGATION: PATIENT EXPOSURE TO RADIATION AND INTER-OPERATOR VARIABILITY IN AN IRISH SETTING Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2020-12-14 Anderson J, Zanardo M, Smyth B, et al.
AbstractAim: To evaluate patient radiation exposure for Diagnostic Coronary Angiography (DCA) and Percutaneous Cardiac Intervention (PCI) performed by different operators. Methods and Results: Retrospective (n = 160) and prospective (n = 62) data for DCA (n = 179) and PCI (n = 43) examinations performed by interventional cardiologists (n = 3) using the same imaging equipment were reviewed. The operator
-
POTENTIAL ENVIRONMENTAL HAZARD TO THE PUBLIC FROM THE OPERATION OF URANIUM MINING AND MILLING FACILITY Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2020-12-11 Rweyemamu M, Kim J.
AbstractMining and milling processes could cause potential radiological exposures to the public. The objective of this study was to estimate the off-site radiological doses expected to be received by the public as a result of uranium mining and milling activities at Mkuju River Project in the United Republic of Tanzania. MILDOS-AREA was used to estimate off-site doses along with RESRAD-OFFSITE for
-
SUBOPTIMAL MODULATION OF RADIATION DOSE IN THE COMPUTED TOMOGRAPHY COMPONENT OF WHOLE-BODY POSITRON EMISSION TOMOGRAPHY/COMPUTED TOMOGRAPHY Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2020-12-11 Inoue Y, Adachi M, Shimizu H, et al.
AbstractRadiation exposure in computed tomography (CT) is automatically modulated by automatic exposure control (AEC) mainly based on scout images. To simulate the whole-body positron emission tomography/CT, CT images of a phantom were obtained using the posteroanterior scout image alone (PA scout) or the posteroanterior and lateral images (PA + Lat scout). Old and new versions of the AEC software
-
COSMIC RADIATION EXPOSURE CALCULATIONS FOR INTERNATIONAL AND DOMESTIC FLIGHTS DEPARTS FROM ISTANBUL AND ANKARA Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2020-12-10 Susam L, Alan H, Yilmaz A, et al.
AbstractIn this study, cosmic radiation doses were calculated for domestic and international flights departing from Istanbul and furthermore for domestic flights departing from Ankara using a software program called CARI-7A and also a mathematical method approach. Main parameters for calculating cosmic radiation are vertical cut-off rigidity, flight duration, latitude–longitude and altitude of the
-
ASSESSMENT OF OCCUPATIONAL RADIATION DOSES OF MEDICAL RADIATION WORKERS IN TWO COMMUNITY HOSPITALS Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2020-12-08 Osei E, Nuru F, Moore M.
AbstractThe International Commission on Radiological Protection recommends the adoption of the linear, no-threshold model as a predictive risk model for radiation protection purposes since the relationship between low-dose radiation exposure and cancer risk is unclear. Medical radiation workers are subject to occupational exposures and differences in workload, area of work and types of exposure can
-
A SURVEY STUDY OF RADIATION PROTECTION AWARENESS AMONG RADIOLOGY TECHNICIANS IN MOGADISHU, SOMALIA Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2020-12-07 Aras S, Tanzer I, Ikizceli T.
AbstractWe investigate the ionizing radiation exposure awareness and subject matter knowledge among clinical radiology technicians working in state and private hospitals in Mogadishu, Somalia. Research data are collected via face to face interviews with a prepared questionnaire performed between April and May 2018 in Mogadishu, Somalia. A total of 61 clinical radiology technicians working in 10 state
-
DEVELOPMENT OF NACL-BASED OPTICALLY STIMULATED LUMINESCENT PHOSPHORS FOR THE POSSIBLE APPLICATIONS IN DOSIMETRY Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2020-12-07 Gaikwad S, Patil R, Kulkarni M, et al.
AbstractNew highly sensitive optically stimulated luminescent phosphors with NaCl moiety and dopants Ca,Cu,P/Mg,Cu,P are developed. These phosphors show very high optically stimulated luminescence (OSL) sensitivity. The dose response for NaCl:Ca,Cu,P is linear up to 1.2 Gy and for NaCl:Mg,Cu,P is slightly sub linear from 0.2 Gy. These phosphors show 30% fading during first 4 and later signal gets stabilised
-
TRANSMISSION COEFFICIENT OF POWER DENSITY INTO SKIN TISSUE BETWEEN 6 AND 300 GHZ Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2020-12-04 Christ A, Samaras T, Neufeld E, et al.
AbstractThe latest electromagnetic safety guidelines define transmitted or epithelial power density as the basic restriction above 6 GHz. In this note, we derive an approximation for a conservative transmission coefficient for quasi plane wave incidence as a function of the frequency for the normal component of the Poynting vector with respect to the evaluation plane or tissue surface |Sz inc| and
-
UNCERTAINTY OF THERMOLUMINESCENCE AT LOW DOSE LEVELS: A MONTE-CARLO SIMULATION STUDY Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2020-11-30 Sadek A.
AbstractThe purpose of the current work is to investigate the effect of the scatter data and the background noise level on the uncertainty of the thermoluminescence (TL) measurements. The Monte-Carlo (MC) algorithm has been used to simulate the scattering data and the background noise signal in TL glow-curve. Under the simulation and experimental parameters used in the present study, a new general
-
210PO IN SOIL AND TOBACCO LEAVES IN QUANG XUONG, VIETNAM AND ESTIMATION OF ANNUAL EFFECTIVE DOSE TO SMOKERS Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2020-11-24 Van Duong H, Thanh Nguyen D, Peka A, et al.
Abstract210Po is the main radiotoxic chemical in tobacco smoke and one of the primary causes of lung cancer. Investigating 210Po concentration in tobacco is important in estimating the annual effective dose (AED) due to smoking. In this study, the 210Po concentrations in tobacco leaves and soil in Quang Xuong, Vietnam were measured using a high-resolution passivated and implanted planar silicon detector
-
ASSESSING THE COMPLIANCE OF ELECTROMAGNETIC FIELDS RADIATED BY BASE STATIONS AND WIFI ACCESS POINTS WITH INTERNATIONAL GUIDELINES ON UNIVERSITY CAMPUS Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2020-11-24 Keshmiri S, Gholampour N, Mohtashami V.
AbstractThis paper presents a series of electromagnetic field measurements performed on the campus of Ferdowsi University of Mashhad in order to assess the compliance of radiation levels of cellular base stations and WiFi access points with international guidelines. A calibrated, broadband and isotropic probe is used and recommendations of International Telecommunication Union (ITU) are followed up
-
FOREWORD Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2020-11-27 Rovenská K, Thinová L.
The long-awaited ICRP Publication 137 issued in 2017 brought us the new dose conversion coefficients in black and white. From the first moment, we were clear on the main topic for the 9th Conference on Protection against Radon at Home and at Work. New values of the conversion factor for the calculation of effective dose from inhalation of radon and its progenies bring us new challenges, mainly in the
-
Neutron and Gamma Albedo Evaluation at an Irradiation Facility Radiat. Protect. Dosim. (IF 0.773) Pub Date : 2020-12-23 Riccardo Ciolini, Andrea Marini, Valerio Giusti, Francesco d’Errico
The irradiation facility of the University of Pisa (UNIPI) is a neutron and gamma irradiation facility of the University of Pisa used for calibration purposes and to evaluate detectors and dosemeters for mixed neutron and gamma fields. The facility consists of a fairly large room (5.0 × 7.8 × 2.5 m3) with concrete walls and roof designed to minimise radiation scattering. Sealed neutron and gamma radionuclide
Contents have been reproduced by permission of the publishers.