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Journal of Radiological Protection: Official Journal of the Society for Radiological Protection

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https://www.readbyqxmd.com/read/28002056/radionulide-analyses-of-ingested-water-from-some-estuaries-within-the-coastal-area-of-akwa-ibom-state-nigeria
#1
P I Enyinna, U G Uboh
Radionuclide analyses of ingested water from three selected estuaries within the coastal areas of Akwa Ibom State, Nigeria have been carried out. Fifteen water samples collected at strategic points from the estuaries were pre-treated and each placed on the sodium iodide NaI (Tl) -model 802 detector for 3600 s to obtain the gamma radiation count rate. The activity concentrations and other radiological risk parameters were computed. The effective dose rate of radiation due to ingested water (E.D.I.W.) ranged between 0...
December 21, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28002043/radiation-dose-due-to-radon-and-thoron-progeny-inhalation-in-high-level-natural-radiation-areas-of-kerala-india
#2
Yasutaka Omori, Shinji Tokonami, Sarata Kumar Sahoo, Tetsuo Ishikawa, Atsuyuki Sorimachi, Masahiro Hosoda, Hiromi Kudo, Chanis Pornnumpa, Raghu Ram K Nair, Padmavaty Amma Jayalekshmi, Paul Sebastian, Suminori Akiba
In order to evaluate internal exposure to radon and thoron, concentrations for radon, thoron, and thoron progeny were measured for 259 dwellings located in high background radiation areas (HBRAs, outdoor external dose: 3-5 mGy y(-1)) and low background radiation areas (control areas, outdoor external dose: 1 mGy y(-1)) in Karunagappally Taluk, Kerala, India. The measurements were conducted using passive-type radon-thoron detectors and thoron progeny detectors over two six-month measurement periods from June 2010 to June 2011...
December 21, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/27977415/practical-experiences-in-the-transfer-of-clinical-protocols-between-ct-scanners-with-different-atcm-systems
#3
Supawitoo Sookpeng, Colin J Martin, Patsuree Cheebsumon, Thanyawee Pengpan
Automatic tube current modulation (ATCM) systems to aid in optimizing dose and image noise have become standard on computed tomography (CT) scanners over the last decade. ATCM systems of the main vendors modulate tube current in slightly different ways, with some using a control parameter related to image noise (e.g. Toshiba, GE) while others use a quality reference image mAs (e.g. Siemens). The translation of clinical protocols including ATCM operation between CT scanners from different manufacturers in order to obtain similar levels of image quality with optimized exposure variables has become an important issue...
December 15, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/27958197/awareness-of-ionizing-radiation-exposure-among-junior-doctors-and-senior-medical-students-in-radiological-investigations
#4
Elfatih Abuelhia
The awareness and knowledge of ionizing radiation exposure in radiological investigations among junior doctors and medical students were studied. The participants were year four to year six senior medical students enrolled at University of Dammam and interns in King Fahad University Hospital. The survey consisted of 22 questions designed online using the software 'QuestionPro' licensed to the University of Dammam. 100 hard copies were also distributed manually and collected. A total of 221 (88.5%) questionnaires were completed...
December 13, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/27958195/assessment-of-radiological-protection-systems-among-diagnostic-radiology-facilities-in-north-east-india
#5
Thokchom Dewan Singh, T Jayaraman, B Arunkumar Sharma
This study aims to assess the adequacy level of radiological protection systems available in the diagnostic radiology facilities located in three capital cities of North East (NE) India. It further attempts to understand, using a multi-disciplinary approach, how the safety codes/standards in diagnostic radiology framed by the Atomic Energy Regulatory Board (AERB) and the International Atomic Energy Agency (IAEA) to achieve adequate radiological protection in facilities, have been perceived, conceptualized, and applied accordingly in these facilities...
December 13, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/27941226/estimating-head-and-neck-tissue-dose-from-x-ray-scatter-to-physicians-performing-x-ray-guided-cardiovascular-procedures-a-phantom-study
#6
Kenneth A Fetterly, Beth A Schueler, Michael P Grams, Glenn M Sturchio
Physicians performing x-ray guided interventional procedures have a keen interest in radiation safety. Radiation dose to tissues and organs of the head and neck are of particular interest because they are not routinely protected by wearable radiation safety devices. This study was conducted to facilitate estimation of radiation dose to tissues of the head and neck of interventional physicians based on the dose recorded by a personal dosimeter worn on the left collar. Scatter beam qualities maximum energy and HVL were measured for 40 scatter beams emitting from an anthropomorphic patient phantom...
December 12, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/27922832/individual-external-dose-monitoring-of-all-citizens-of-date-city-by-passive-dosimeter-5-to-51-months-after-the-fukushima-npp-accident-series-1-comparison-of-individual-dose-with-ambient-dose-rate-monitored-by-aircraft-surveys
#7
Makoto Miyazaki, Ryugo Hayano
Date (da'te) City in Fukushima Prefecture has conducted a population-wide individual dose monitoring program after the Fukushima Daiichi Nuclear Power Plant Accident, which provides a unique and comprehensive data set of the individual doses of citizens. The purpose of this paper, the first in the series, is to establish a method for estimating effective doses based on the available ambient dose rate survey data. We thus examined the relationship between the individual external doses and the corresponding ambient doses assessed from airborne surveys...
December 6, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/27922831/comprehensive-monte-carlo-study-of-patient-doses-from-cone-beam-ct-imaging-in-radiotherapy
#8
T E Marchant, K D Joshi
Accurate knowledge of ionizing radiation dose from cone-beam CT (CBCT) imaging in radiotherapy is important to allow concomitant risks to be estimated and for justification of imaging exposures. This study uses a Monte Carlo CBCT model to calculate imaging dose for a wide range of imaging protocols for male and female patients. The Elekta XVI CBCT system was modeled using GATE and simulated doses were validated against measurements in a water tank and thorax phantom. Imaging dose was simulated in the male and female ICRP voxel phantoms for a variety of anatomical sites and imager settings (different collimators, filters, full and partial rotation)...
December 6, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/27922829/a-methodology-to-split-the-total-cumulative-hp-10-dose-into-the-hp-10-i-doses-received-during-various-procedures-performed-by-interventional-cardiologist
#9
Joanna Domienik
The methodology describing how to split the cumulative Hp(10) dose of interventional cardiologists into Hp(10) i doses received during procedures of various types based on procedure-specific ELDO coefficients and Hp(3) doses per procedure is presented. The appropriate equations for Hp(10) i (Hp(10) for procedure type i), depending on the number of various procedure types (i  =  1 … 4) performed by a particular physician, are derived. The methodology can be applied to whole-body doses measured on the lead apron and therefore can be used for optimisation of work practices in those catheterisation labs where routine dosimeter is worn above the apron...
December 6, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/27922828/a-new-method-of-estimation-of-dose-conversion-coefficients-for-aquatic-biota
#10
Yang Li, Jiangguo Li, Huijuan Wang, Aijun Wang
In order to develop the basis of an approach, through which we can comprehend the relationships of radiation exposures and dose, and dose and radiological effects, large numbers of dosimetric data are required. It is complex to estimate the dosimetry involved due to enormous variability of organism shapes, masses, and their natural habitats. This paper aims to develop an empirical equation, which correlates dose conversion coefficients (DCCs) with organism volume V, density ρ, source energy E and curve fitting coefficients...
December 6, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/27893457/core-ethical-values-of-radiological-protection-applied-to-fukushima-case-reflecting-common-morality-and-cultural-diversities
#11
Chieko Kurihara, Kunwoo Cho, Richard E Toohey
The International Commission on Radiological Protection (ICRP) has established Task Group 94 (TG94) to develop a publication to clarify the ethical foundations of the radiological protection system it recommends. This TG identified four core ethical values which structure the system: beneficence and non-maleficence, prudence, justice, and dignity. Since the ICRP is an international organization, its recommendations and guidance should be globally applicable and acceptable. Therefore, first this paper presents the basic principles of the ICRP radiological protection system and its core ethical values, along with a reflection on the variation of these values in Western and Eastern cultural traditions...
November 28, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/27893456/updated-effective-doses-in-radiology
#12
Jorge Vilar-Palop, José Vilar, Ildefonso Hernández-Aguado, Isabel González-Álvarez, Blanca Lumbreras
The aim of this study was to review recent literature in order to provide updated values of the typical effective doses associated with the top 20 imaging tests for adults and children and for the most widely used set of weights (ICRP60) as well as for the most recent one (ICRP103). We performed a systematic research on radiation dosimetry in radiology published from 2007 onwards through the Medline, Embase and Cochrane Library Plus databases. We also included studies backed by scientific or governmental organizations...
November 28, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/27893455/patient-radiation-doses-in-paediatric-interventional-cardiology-procedures-a-review
#13
R W Harbron, S Dreuil, M-O Bernier, M S Pearce, I Thierry-Chef, C-L Chapple, H Baysson
A large number of investigations into the radiation doses from x-ray guided interventional cardiology procedures in children have been carried out in recent years. A review was conducted of these studies, gathering data on kerma area product (P KA), fluoroscopic screening time (FT), air kerma, and estimates of effective dose and organ doses. The majority of studies focus on P KA and FT with no estimation of dose to the patient. A greater than ten-fold variation in average P KA was found between different studies, even where data were stratified by patient age or weight...
November 28, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/27893453/a-geographical-study-of-thyroid-cancer-incidence-in-north-west-england-following-the-windscale-nuclear-reactor-fire-of-1957
#14
Richard J Q McNally, Richard Wakeford, Peter W James, Nermine O Basta, Robert D Alston, Mark S Pearce, Alex T Elliott
The Windscale nuclear reactor fire at Sellafield, United Kingdom, in October 1957 led to an uncontrolled release of iodine-131 (radioactive half-life, 8 d) into the atmosphere. Contamination from the accident was most pronounced in the counties of Cumbria and Lancashire, north-west England. Radioiodine concentrates in the thyroid gland producing an excess risk of thyroid cancer, notably among those exposed as children, which persists into later life. For an initial investigation of thyroid cancer incidence in north-west England, data were obtained on cases of thyroid cancer among people born during 1929-1973 and diagnosed during 1974-2012 while resident in England, together with corresponding populations...
November 28, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/27893452/confounding-of-the-association-between-radiation-exposure-from-ct-scans-and-risk-of-leukemia-and-brain-tumors-by-cancer-susceptibility-syndromes
#15
Johanna M Meulepas, Cécile M Ronckers, Johannes Merks, Michel E Weijerman, Jay H Lubin, Michael Hauptmann
Recent studies linking radiation exposure from pediatric computed tomography (CT) to increased risks of leukemia and brain tumors lacked data to control for cancer susceptibility syndromes (CSS). These syndromes might be confounders because they are associated with an increased cancer risk and may increase the likelihood of pediatric CT scans. We identify CSS predisposing to leukemia and brain tumors through a systematic literature search and summarize prevalence and risk. Since empirical evidence is lacking in published literature on patterns of CT use for most types of CSS, we estimate confounding bias of relative risks (RR) for categories of radiation exposure based on expert opinion about patterns of CT scans among CSS patients...
November 28, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/27893450/parental-wishes-for-continued-internal-radiation-contamination-screenings-in-fukushima-schoolchildren
#16
Claire Leppold, Masaharu Tsubokura, Yukio Kanazawa
No abstract text is available yet for this article.
November 28, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/27893448/in-field-evaluation-of-the-impact-of-ageing-and-fading-effects-on-annual-radon-concentration-measurements-for-two-different-techniques
#17
G Venoso, M Ampollini, S Antignani, C Carpentieri, F Bochicchio
Measurements covering a 1 year period are often used and required by legislation to assess the average radon concentration within a house or a workplace. This kind of long-term measurement-generally carried out with techniques based on nuclear track detectors-can be affected by a reduction in sensitivity due to ageing and fading of latent tracks during the exposure period, thus resulting in an underestimation of the actual average concentration. In order to evaluate in field conditions the ageing and fading effects on annual radon concentration measurements, two different studies in a large sample of rooms in dwellings (162) and in workplaces (432) were conducted using two different techniques (detector and track read-out system): (i) CR-39 plastics readout with a fully automated image analysis system, and (ii) LR 115 films with a spark-counter for track counting...
November 28, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/27893444/response-to-criticism-of-the-paper-titled-non-targeted-effects-and-radiation-induced-carcinogenesis-a-review
#18
Julie Burtt, Patsy Thompson, Robert Lafrenie
No abstract text is available yet for this article.
November 28, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/27893443/health-effects-of-the-windscale-pile-fire
#19
Steve Jones
No abstract text is available yet for this article.
November 28, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/27893442/inconsistency-of-a-recently-proposed-method-for-assessing-magnetic-field-exposure-for-protection-against-peripheral-nerve-stimulation-in-occupational-situations
#20
Gernot Schmid, Rene Hirtl
A non-binding guide to practical implementation of European Directive 2013/35/EU concerning the limitation of occupational exposure against electromagnetic fields has been published recently. With regard to exposure assessment this guide proposes practically applicable assessment methods for non-uniform and non-sinusoidal environmental electric and magnetic fields, respectively. For non-sinusoidal magnetic fields in the low frequency range this guide proposes a time domain assessment (TDA) method, claimed to reduce the overestimation of exposure inherent to other assessment methods while being based on fundamental physiological principles regarding nerve stimulation...
November 28, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
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