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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/28253202/evaluation-of-the-shielding-in-a-treatment-room-with-an-electronic-brachytherapy-unit
#1
Blanca Ibanez-Rosello, Juan Antonio Bautista-Ballesteros, Cristian Candela-Juan, Juan Ignacio Villaescusa, Facundo Ballester, Javier Vijande, Jose Perez-Calatayud
Esteya® (Elekta Brachytherapy, Veenendaal, The Netherlands) is an electronic brachytherapy (eBT) system based on a 69.5 kVp x-ray source and a set of collimators of 1 to 3 cm in diameter, used for treating non-melanoma skin cancer lesions. This study aims to estimate room shielding requirements for this unit. The non-primary (scattered and leakage) ambient dose equivalent rates were measured with a Berthold LB-133 monitor (Berthold Technologies, Bad Wildbad, Germany). The latter ranges from 17 mSv h(-1) at 0...
March 2, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28253201/a-multiple-methods-approach-radiation-associated-cataracts-and-occupational-radiation-safety-practices-in-interventionalists-in-south-africa
#2
A Rose, W I D Rae, P Chikobvu, W Marais
Ionising radiation is a modality used in diagnostic and therapeutic medicine. The technology has improved and resulted in lower dose exposure but there has been an escalation in the quantity of procedures, their duration and complexity. These factors have meant increased occupational radiation exposure for interventionalists. Ionising radiation exposure can have detrimental health effects and includes radiation skin burns, various carcinomas, genetic and chromosomal aberrations and cataractogenesis of the lenses of the eye...
March 2, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28253200/conversion-coefficients-for-h-3-%C3%AE-for-photons
#3
Rolf Behrens
In this work, conversion coefficients for the operational quantity H'(3;Ω) have been calculated for both mono-energetic photons from 2 keV to 50 MeV for angles of incidence from 0° up to 180° in steps of 15° (to complement ICRU 57) as well as for photon reference radiation qualities (to complement ISO 4037). Finally, parameters necessary to determine the influence of the air density on the conversion coefficients have been determined.
March 2, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28253199/basis-for-the-icrp-s-updated-biokinetic-model-for-carbon-inhaled-as-co2
#4
Rich Leggett
The International Commission on Radiological Protection (ICRP) is updating its biokinetic and dosimetric models for occupational intake of radionuclides (OIR) in a series of reports called the OIR series. This paper describes the basis for the ICRP's updated biokinetic model for inhalation of radiocarbon as carbon dioxide (CO2) gas. The updated model is based on biokinetic data for carbon isotopes inhaled as carbon dioxide or injected or ingested as bicarbonate [Formula: see text] The data from these studies are expected to apply equally to internally deposited (or internally produced) carbon dioxide and bicarbonate based on comparison of excretion rates for the two administered forms and the fact that carbon dioxide and bicarbonate are largely carried in a common form (CO2-H[Formula: see text] in blood...
March 2, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28253197/assessment-of-the-skin-dose-for-aircrew
#5
Matthias M Meier, Daniel Matthiä
Epidemiological studies are a useful instrument for investigating the influence of environmental factors on human health. In this context, the determination and quantification of the corresponding exposure is a demanding challenge. With regard to the investigation of the potential health effects in aircrew due to cosmic radiation, their occupational exposure at aviation altitudes is usually assessed in terms of the radiation protection quantity effective dose, which is stored in and available from official dose registers in many countries...
March 2, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28247851/innovation-technical-and-social
#6
M C Thorne
No abstract text is available yet for this article.
March 1, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28245205/icrp-international-symposium-on-the-system-of-radiological-protection-and-european-radiological-protection-research-week-10-12-october-2017-paris-france
#7
Simon Bouffler
No abstract text is available yet for this article.
March 20, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28245204/academies-outline-principles-of-good-science-publishing
#8
Richard Wakeford
No abstract text is available yet for this article.
March 20, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28245203/10-january-2017-news-release
#9
Charlene Matthewman
No abstract text is available yet for this article.
March 20, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28245202/response-to-pentreath-radiological-protection-and-the-exposure-of-animals-as-patients-in-veterinary-medicine-2016-j-radiol-prot-36-n42-5
#10
(no author information available yet)
No abstract text is available yet for this article.
March 20, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28245196/challenges-dilemmas-and-quality-criteria-for-safety-reviews
#11
Carl Rollenhagen, Thomas Falk, Sven Ove Hansson
Five generic dilemmas shared by most safety reviews are identified, namely the complexity dilemma, the specialisation dilemma, the criteria dilemma, the independence dilemma and the ethical dilemma. These dilemmas are not always made sufficiently transparent, which may lead to a too optimistic view of what can be achieved by safety reviews. A two-dimensional characterisation of safety reviews is suggested; the dimensions are the degree of independence and the scope of the review. In conclusion ten quality criteria are proposed that can be used to cope with the dilemmas of conducting safety reviews...
March 20, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28245194/the-polonium-210-poisoning-of-mr-alexander-litvinenko
#12
John Harrison, Tim Fell, Rich Leggett, David Lloyd, Matthew Puncher, Mike Youngman
Mr Litvinenko died on 23 November 2006 after having been poisoned with polonium-210 on 1 November. Measurements of the polonium-210 content of post-mortem tissue samples and samples of urine and blood showed the presence of large amounts of (210)Po. Autoradiography of hair samples showed two regions of (210)Po activity, providing evidence of an earlier poisoning attempt during October 2006, resulting in absorption to blood of about one-hundredth of that estimated for 1 November. Intake by ingestion on 1 November was estimated to be around 4 GBq, assuming 10% absorption to blood, and the resulting organ doses reached estimated values that were generally in a range from about 20 Gy to over 100 Gy...
March 20, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28169221/gaussian-plume-atmospheric-modelling-and-radiation-exposure-calculations-following-the-cremation-of-a-deceased-thyroid-cancer-patient-treated-with-iodine-131
#13
Phillipe J Calais
Shortly after treatment with 7200 MBq of (131)I, a thyroid cancer patient died and was subsequently cremated. Calculations of the atmospheric emissions of (131)I from the crematorium flue were performed using a standard atmospheric pollution Gaussian Plume Dispersal model. Estimates of whole-body and thyroid dose of those potentially exposed were made using OLINDA/EXM dosimetry software. Under the meteorological conditions prevalent at the time of the cremation, and depending on the actual release rate of the (131)I, the Western Australian legal limit of 3...
March 20, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28141582/radiation-shielding-calculation-for-digital-breast-tomosynthesis-rooms-with-an-updated-workload-survey
#14
Kai Yang, Thomas J Schultz, Xinhua Li, Bob Liu
PURPOSE: To present shielding calculations for clinical digital breast tomosynthesis (DBT) rooms with updated workload data from a comprehensive survey and to provide reference shielding data for DBT rooms. METHODS: The workload survey was performed from eight clinical DBT (Hologic Selenia Dimensions) rooms at Massachusetts General Hospital (MGH) for the time period between 10/1/2014 and 10/1/2015. Radiation output related information tags from the DICOM header, including mAs, kVp, beam filter material and gantry angle, were extracted from a total of 310 421 clinical DBT acquisitions from the PACS database...
March 20, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28141579/rodes-software-for-dose-assessment-of-rats-and-mice-contaminated-with-radionuclides
#15
Maxime Locatelli, Hanane Miloudi, Gwennhael Autret, Daniel Balvay, Aurélie Desbrée, Eric Blanchardon, Jean-Marc Bertho
In order to support animal experiments of chronic radionuclides intake with realistic dosimetry, voxel-based three-dimensional computer models of mice and rats of both sexes and three ages were built from magnetic resonance imaging. Radiation transport of mono-energetic photons of 11 energies and electrons of 7 energies was simulated with MCNPX 2.6c to assess specific absorbed fractions (SAFs) of energy emitted from 13 source regions and absorbed in 28 target regions. RODES software was developed to combine SAF with radiation emission spectra and user-supplied biokinetic data to calculate organ absorbed doses per nuclear transformation of radionuclides in source regions (S-factors) and for specific animal experiments with radionuclides...
March 20, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28118157/radon-222-in-groundwater-and-effective-dose-due-to-ingestion-and-inhalation-in-the-city-of-ibadan-nigeria
#16
Janet Ayobami Ademola, Oyebode Akanni Oyeleke
Radon concentration in groundwater collected from the eleven Local Government Areas (LGAs) of Ibadan, Nigeria, was analyzed. Annual effective doses due to ingestion and inhalation of radon from the consumption of the water were determined. The arithmetic means (AMs) of radon concentration for the 11 LGAs varied from 2.18 to 76.75 Bq l(-1) with a standard deviation of 1.57 and 70.64 Bq l(-1), respectively. The geometric means (GMs) varied from 1.67 to 49.47 Bq l(-1) with geometric standard deviation of 2.22 and 3...
March 20, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28118156/a-review-of-uncertainties-in-radiotherapy-dose-reconstruction-and-their-impacts-on-dose-response-relationships
#17
Jérémi Vũ Bezin, Rodrigue S Allodji, Jean-Pierre Mège, Guillaume Beldjoudi, Fleur Saunier, Jean Chavaudra, Eric Deutsch, Florent de Vathaire, Valérie Bernier, Christian Carrie, Dimitri Lefkopoulos, Ibrahima Diallo
Proper understanding of the risk of radiation-induced late effects for patients receiving external photon beam radiotherapy requires the determination of reliable dose-response relationships. Although significant efforts have been devoted to improving dose estimates for the study of late effects, the most often questioned explanatory variable is still the dose. In this work, based on a literature review, we provide an in-depth description of the radiotherapy dose reconstruction process for the study of late effects...
March 20, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28118155/the-effects-of-human-height-and-mass-on-the-calculated-induced-electric-fields-at-50-hz-for-comparison-with-the-emf-directive-2013-35-eu
#18
R P Findlay
A worker's height and mass can significantly affect the way in which incident low frequency electric and magnetic fields are absorbed in the body. To investigate this, several anatomically realistic human models were produced for heights between 1.56 and 1.96 m and masses between 33 and 113 kg. The human models were derived from the MAXWEL surface-based phantom, the model previously used in the EMF Directive 2013/35/EU Practical Guide to demonstrate how induced electric fields in the body are calculated. Computer simulations were carried out to calculate the low frequency EMF directive exposure limit value (ELV) quantities, i...
March 20, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28118153/dose-coefficients-for-icrp-reference-pediatric-phantoms-exposed-to-idealised-external-gamma-fields
#19
Lienard A Chang, Steven L Simon, Timothy J Jorgensen, David A Schauer, Choonsik Lee
Organ and effective dose coefficients have been calculated for the International Commission on Radiological Protection (ICRP) reference pediatric phantoms externally exposed to mono-energetic photon radiation (x- and gamma-rays) from 0.01 to 20 MeV. Calculations used Monte Carlo radiation transport techniques. Organ dose coefficients, i.e., organ absorbed dose per unit air kerma (Gy/Gy), were calculated for 28 organs and tissues including the active marrow (or red bone marrow) for 10 phantoms (newborn, 1 year, 5 year, 10 year, and 15 year old male and female)...
March 20, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28118152/shielding-assessment-of-high-field-qed-experiments-at-the-eli-np-10-pw-laser-system
#20
M A Popovici, I O Mitu, Gh Căta-Danil, F Negoit Ă, C Ivan
High field quantum electrodynamics experiments will be conducted in the E6 experimental area of the Extreme Light Infrastructure-Nuclear Physics building. Here electrons and protons will be accelerated up to relativistic energies by multi-petawatt laser beam-target interactions. In this respect, the requirements for radiological safety measures are similar to those associated with the operation of conventional high energy accelerators. The paper presents a FLUKA simulation approach to the shielding assessment of the individual experiments...
March 20, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
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