7,205 results match your criteria Radiation Protection Dosimetry [Journal]


EYE LENS DOSES OF RADIOLOGY TECHNOLOGISTS WHO ASSIST PATIENTS DURING RADIOGRAPHY.

Radiat Prot Dosimetry 2019 Feb 11. Epub 2019 Feb 11.

Department of Radiology, Japanese Red Cross Sendai Hospital, 2-43-3 Yagiyama Honcho, Sendai, Miyagi 982-8501, Japan.

The International Commission on Radiological Protection (ICRP) revised a drastic decrease of the annual eye equivalent dose limit. The present study aimed to evaluate the amounts of radiation to which the eye lenses of radiological technologists (RT) become exposed and the effects of wearing lead glasses on dose reduction while assisting patients during radiographic assessments. Lens equivalent doses (Hp(3)) were measured at the neck using personal dosemeter. Read More

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http://dx.doi.org/10.1093/rpd/ncz007DOI Listing
February 2019
2 Reads

NOVEL ANALYTICAL STUDY FOR REACTION INTERMEDIATES IN THE PRIMARY RADIATION INTERACTION OF DNA USING A SYNCHROTRON RADIATION-INDUCED LUMINESCENCE SPECTROSCOPY.

Radiat Prot Dosimetry 2019 Feb 11. Epub 2019 Feb 11.

Synchrotron Radiation Research Center, Japan Atomic Energy Agency (JAEA), Sayo-gun, Hyougo 679-5148, Japan.

To identify the precise molecular processes to induce DNA lesions, we attempt a novel spectroscopy of X-ray induced luminescence (XIL) using soft X-ray synchrotron radiation, which is a non-destructive analysis of the reaction intermediates in the elementary reaction pathway of damage induction and self-organized restoration. Using a liquid micro-jet technique to introduce aqueous samples in a vacuum chamber, we measure UV-visible luminescence from nucleotide solution as a function of the soft X-ray energy from the nitrogen to oxygen K-edge region. The LEX intensities for the nucleotide solutions are significantly enhanced in the soft X-ray region (410-530 eV) which is ascribed to the K-shell excitation/ionization of nitrogen atoms in the nucleobases. Read More

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http://dx.doi.org/10.1093/rpd/ncy239DOI Listing
February 2019

INSTITUTIONAL BREAST DOSES IN DIGITAL MAMMOGRAPHY.

Radiat Prot Dosimetry 2019 Feb 12. Epub 2019 Feb 12.

Department of Medical Physics, School of Medicine, University of Patras, Patras, Greece.

The objective of this study was to survey breast dose in screening mammography, establish institutional doses and compare them with the corresponding dose values. Three hundred women between the ages of 40 and 80 years old participated in the study. All mammographic examinations were performed with a digital mammography system. Read More

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http://dx.doi.org/10.1093/rpd/ncz005DOI Listing
February 2019
1 Read

HOW TO ESTABLISH AN ADEQUATE SYSTEM FOR EYE LENS DOSE MONITORING: A PROPOSAL FOR TYPICAL WORKPLACES.

Radiat Prot Dosimetry 2019 Feb 11. Epub 2019 Feb 11.

Belgian Nuclear Research Centre (SCK•CEN), Boeretang 200, Mol BE-2400, Belgium.

For years, the dose limit of 150 mSv for occupational exposure of the lens of the eye to ionising radiation was rarely exceeded, and the dose to the eye was only monitored occasionally. With the national implementation of the European Basic Safety Standards in 2018, this dose limit was reduced to 20 mSv and the Member States are expected to implement an adequate system for the monitoring of category A workers. Where the system for monitoring the whole body dose is settled in most countries, this is not the situation for the lens of the eye. Read More

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http://dx.doi.org/10.1093/rpd/ncz009DOI Listing
February 2019

SESAME: A TOOL FOR NUMERICAL DOSIMETRIC RECONSTRUCTION OF PATIENTS OVEREXPOSURES IN INTERVENTIONAL RADIOLOGY.

Radiat Prot Dosimetry 2019 Feb 7. Epub 2019 Feb 7.

Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Pôle Santé et Environnement, 31 Avenue de la Division Leclerc, 92260 Fontenay-aux- Roses, France.

Radiation overexposure accidents are rare but can have severe health consequences. Evaluating the dose received by the patient is a crucial step in the medical management. For that purpose, for more than 15 years, IRSN has been developing an in-house tool named SESAME for the numerical reconstruction of radiological accidents due to external sources. Read More

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http://dx.doi.org/10.1093/rpd/ncz004DOI Listing
February 2019
1 Read

A NOVEL BIOLOGICAL DOSIMETRY ASSAY AS A POTENTIAL TOOL FOR TRIAGE DOSE ASSESSMENT IN CASE OF LARGE-SCALE RADIOLOGICAL EMERGENCY.

Radiat Prot Dosimetry 2019 Feb 6. Epub 2019 Feb 6.

ENEA Casaccia Research Center, Department for Sustainability, Division Health Protection Technologies, Via Anguillarese, 301 Rome, Italy.

In case of mass radiological emergencies, new strategies involving biological and clinical endpoints are requested for an efficient triage classification of casualties. For this purpose, we developed a novel protocol combining the two most established cytogenetic methods used in biological dosimetry (dicentric and micronucleus assays) into a single one, in order to have a time-saving, inexpensive and potentially automatable instrument to be used for triage purposes in case of large-scale radiological events. This method could be considered as a 'three in one' assay allowing the simultaneous scoring of chromosome aberrations and micronuclei on a single slide, and also enabling to discriminate between metaphases in first and second cell division without the Fluorescence plus Giemsa staining. Read More

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https://academic.oup.com/rpd/advance-article/doi/10.1093/rpd
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http://dx.doi.org/10.1093/rpd/ncz001DOI Listing
February 2019
5 Reads

THE COMPLEXITY OF QUANTITIES IN RADIATION DOSIMETRY: THE ISSUE OF RADIATION QUALITY.

Radiat Prot Dosimetry 2019 Feb 6. Epub 2019 Feb 6.

International Commission on Radiation Units and Measurements, ICRU, Heidelberg, Germany.

When Harald Rossi developed a new radiation measurement instrument more than 60 years ago-the tissue equivalent low-pressure proportional counter, also called Rossi Counter-his initial intention was to provide a technique to measure LET. He realized soon that the measurements provided insight into the stochastic nature of the interactions of ionizing radiation with matter and that the measured results represented an alternative to characterize radiation quality in terms of stochastic or microdosimetric quantities. Progress in cellular and molecular radiation biology and in simulating charged particle tracks in biological entities are now essential features and have extended the original delineation of the field of microdosimetry. Read More

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http://dx.doi.org/10.1093/rpd/ncy305DOI Listing
February 2019
2 Reads

TRACKING DOWN ALPHA-PARTICLES: THE DESIGN, CHARACTERISATION AND TESTING OF A SHALLOW-ANGLED ALPHA-PARTICLE IRRADIATOR.

Radiat Prot Dosimetry 2019 Feb 6. Epub 2019 Feb 6.

CRUK/MRC Oxford Institute for Radiation Oncology, University of Oxford, Gray Laboratories, ORCRB Roosevelt Drive, Oxford OX3 7DQ, UK.

Human exposure to α-particles from radon and other radionuclides is associated with carcinogenesis, but if well controlled and targeted to cancer cells, α-particles may be used in radiotherapy. Thus, it is important to understand the biological effects of α-particles to predict cancer risk and optimise radiotherapy. To enable studies of α-particles in cells, we developed and characterised an α-particle automated irradiation rig that allows exposures at a shallow angle (70° to the normal) of cell monolayers in a 30 mm diameter dish to complement standard perpendicular irradiations. Read More

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http://dx.doi.org/10.1093/rpd/ncy300DOI Listing
February 2019
0.913 Impact Factor

DISCRIMINATION METHOD FOR GAMMA RAY DOSES IN NEUTRON FIELDS USING AN IONIZATION CHAMBER WITH ATTENUATION FILTERS.

Radiat Prot Dosimetry 2019 Feb 6. Epub 2019 Feb 6.

National Institute of Radiological Sciences, National Institute for Quantum and Radiological Science and Technology, Chiba, Japan.

Neutron fields produced by an accelerator-driven neutron source are generally mixed radiation fields that consist of fast neutrons and gamma rays. To estimate the biological effects of fast neutrons precisely, the gamma ray dose contamination must be evaluated in neutron fields. In this work, we developed a discrimination technique for absorbed doses (60Co gamma-ray equivalent) of fast neutrons and gamma rays using an ionization chamber. Read More

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http://dx.doi.org/10.1093/rpd/ncz002DOI Listing
February 2019
1 Read

MODELING STUDIES ON DICENTRICS INDUCTION AFTER SUB-MICROMETER FOCUSED ION BEAM GRID IRRADIATION.

Radiat Prot Dosimetry 2018 Dec 17. Epub 2018 Dec 17.

Institute for Applied Physics and Metrology, Universität der Bundeswehr München, Werner-Heisenberg-Weg 39, Neubiberg, Germany.

The biophysical simulation tool PARTRAC contains modules for DNA damage response representing non-homologous end joining of DNA double-strand breaks (DSB) and the formation of chromosomal aberrations. Individual DNA ends from the induced DSB are followed regarding both their enzymatic processing and spatial mobility, as is needed for chromosome aberrations to arise via ligating broken ends from different chromosomes. In particular, by tracking the genomic locations of the ligated fragments and the positions of centromeres, the induction of dicentrics can be modeled. Read More

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http://dx.doi.org/10.1093/rpd/ncy266DOI Listing
December 2018

CONCEPTS OF OPERATIONS FOR A US DOSIMETRY AND BIODOSIMETRY NETWORK.

Radiat Prot Dosimetry 2019 Feb 6. Epub 2019 Feb 6.

Uniformed Services University of the Health Sciences, Armed Forces Radiobiology Research Institute, 4555 South Palmer Road, Bldg. 42, Bethesda MD 20889-5648, USA.

The USA must be prepared to provide a prompt, coordinated and integrated response for radiation dose and injury assessment for suspected radiation exposure, whether it involves isolated cases or mass casualties. Dose estimation for radiation accidents typically necessitates a multiple parameter diagnostics approach that includes clinical, biological and physical dosimetry to provide an early-phase radiation dose. A US Individual Dosimetry and Biodosimetry Network (US-IDBN) will increase surge capacity for civilian and military populations in a large-scale incident. Read More

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http://dx.doi.org/10.1093/rpd/ncy294DOI Listing
February 2019
1 Read
0.913 Impact Factor

SIMULATION OF OSL AND TLD DOSEMETER RESPONSE FOR THE DEVELOPMENT OF NEW EXTREMITY DOSEMETERS.

Radiat Prot Dosimetry 2019 Jan 21. Epub 2019 Jan 21.

Individual Monitoring Service, Helmholtz Zentrum München - German Research Center for Environmental Health (GmbH), Otto-Hahn-Ring 6, München, Germany.

The individual monitoring service at the Helmholtz Zentrum München is currently developing a new eye lens dosemeter to be integrated in radiation protection glasses and a new ring dosemeter using a new BeOSL detector element for extremity dosimetry developed by Dosimetrics. In the design process for the new eye lens dosemeter, MCNP6 Monte Carlo simulations were used to model the energy and angular response of new dosemeters before ordering the expensive tools for injection molding. This study describes the simulation of the dosemeter and detector, and the involved calculations do obtain the response in terms of the radiation protection quantity Hp(3). Read More

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https://academic.oup.com/rpd/advance-article/doi/10.1093/rpd
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http://dx.doi.org/10.1093/rpd/ncy299DOI Listing
January 2019
12 Reads

RADIATION DOSES TO ANAESTHETISTS DURING PROSTATIC ARTERY EMBOLIZATION INTERVENTIONAL PROCEDURES.

Radiat Prot Dosimetry 2019 Jan 21. Epub 2019 Jan 21.

Departamento de Energía Nuclear, Universidade Federal de Pernambuco, Av. Prof. Luiz Freire, 1000 - Cidade Universitaria, Recife, Brazil.

The objective of this study was to assess the radiation doses received by anaesthetists from prostatic artery embolization (PAE) procedures. Ten PAE procedures conducted in a reference hospital in the city of Recife, Brazil were investigated. Occupational dosimetry was performed using thermoluminescent dosemeters which were located next to the eyes, close to the thyroid (over the shielding), on the thorax (under the apron), on the wrist and on the feet of the physician's body. Read More

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https://academic.oup.com/rpd/advance-article/doi/10.1093/rpd
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http://dx.doi.org/10.1093/rpd/ncy295DOI Listing
January 2019
12 Reads

MWDS-2016: THE SLOW DISSOLUTION RATE FOR PLUTONIUM NITRATE INTAKES AT THE MAYAK FACILITY.

Authors:
R K Bull M Puncher

Radiat Prot Dosimetry 2019 Jan 21. Epub 2019 Jan 21.

Public Health England, Chilton, Didcot, Oxon, UK.

The slow dissolution rate of material deposited in the lung plays a key role in determining the eventual radiation dose received by the lung. It is therefore of great importance to establish a reliable value for this parameter, to incorporate into the latest Mayak Worker Dosimetry System (MWDS-2016). Disparate values have been obtained for the slow dissolution rate of plutonium nitrate. Read More

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http://dx.doi.org/10.1093/rpd/ncy296DOI Listing
January 2019
8 Reads

A BIOPHYSICAL ANALYSIS TO ASSESS X-RAY SENSITIVITY OF HEALTHY AND TUMOUR CELLS.

Radiat Prot Dosimetry 2019 Jan 21. Epub 2019 Jan 21.

Centro Interdipartimentale di Ricerca sui Biomateriali, University of Naples Federico II.

The mechanobiology is providing novel perspectives in the study of cancer and is contributing to evaluate the cancer responses, from a biophysical point of view, to classical therapeutic approaches- radiotherapy and chemotherapy. Here we have explored the effects of two doses (4 and 8 Gy) of 6 MeV photons on spreading, focal adhesions, migration and mechanical properties of BALB/c 3T3 and their SV40 transformed equivalent, SVT2. Cell biophysical responses to 4 and 8 Gy were analysed and compared with those reported in previous published work when lower doses (1 and 2 Gy) were administered Panzetta et al. Read More

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http://dx.doi.org/10.1093/rpd/ncy303DOI Listing
January 2019
7 Reads

INVESTIGATING VARIABLE RBE IN A 12C MINIBEAM FIELD WITH MICRODOSIMETRY AND GEANT4.

Radiat Prot Dosimetry 2019 Jan 21. Epub 2019 Jan 21.

Centre for Medical Radiation Physics, University of Wollongong, Wollongong, NSW, Australia.

An experimental and simulation-based study was performed on a 12C ion minibeam radiation therapy (MBRT) field produced with a clinical broad beam and a brass multi-slit collimator (MSC). Silicon-on-insulator (SOI) microdosimeters developed at the Centre for Medical Radiation Physics (CMRP) with micron sized sensitive volumes were used to measure the microdosimetric spectra at varying positions throughout the MBRT field and the corresponding dose-mean lineal energies and RBE for 10% cell survival (RBE10) were calculated using the modified Microdosimetric Kinetic Model (MKM). An increase in the average RBE10 of ∼30% and 10% was observed in the plateau region compared to broad beam for experimental and simulation values, respectively. Read More

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http://dx.doi.org/10.1093/rpd/ncy234DOI Listing
January 2019
4 Reads

MODELLING DSB REPAIR KINETICS FOR DNA DAMAGE INDUCED BY PROTON AND CARBON IONS.

Authors:
Reza Taleei

Radiat Prot Dosimetry 2019 Jan 21. Epub 2019 Jan 21.

Division of Medical Physics, Department of Radiation Oncology, University of Virginia, Charlottesville, VA.

Proton and carbon therapy are the main choices of particle therapy for cancer treatment. Particle dose distribution is superior to conventional photon therapy dose distribution due to Bragg peak. However, the basic biology of cellular damage and cell death is not well understood. Read More

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https://academic.oup.com/rpd/advance-article/doi/10.1093/rpd
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http://dx.doi.org/10.1093/rpd/ncy304DOI Listing
January 2019
6 Reads

QUANTITATIVE ANALYSIS OF THE POTENTIAL ROLE OF BASAL CELL HYPERPLASIA IN THE RELATIONSHIP BETWEEN CLONAL EXPANSION AND RADON CONCENTRATION.

Radiat Prot Dosimetry 2019 Jan 21. Epub 2019 Jan 21.

Radiation Biophysics Group, Environmental Physics Department, MTA Centre for Energy Research, Budapest, Hungary.

Applying the two-stage clonal expansion model to epidemiology of lung cancer among uranium miners, it has been revealed that radon acts as a promoting agent facilitating the clonal expansion of already mutated cells. Clonal expansion rate increases non-linearly by radon concentration showing a plateau above a given exposure rate. The underlying mechanisms remain unclear. Read More

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http://dx.doi.org/10.1093/rpd/ncy302DOI Listing
January 2019
4 Reads

THE RADIOBIOLOGICAL PLATFORM AT ARRONAX.

Radiat Prot Dosimetry 2019 Jan 21. Epub 2019 Jan 21.

INSERM, CRCINA, Nantes, France.

The cyclotron ARRONAX can deliver different types of particles (protons, deuterons, alpha-particles) in an energy range up to 68 MeV. One of its six experimental halls is dedicated to studying the interactions of radiation with matter including living matter. A horizontal beamline for cell irradiation has been setup and characterized. Read More

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http://dx.doi.org/10.1093/rpd/ncy301DOI Listing
January 2019
2 Reads

10-MV SBRT FFF IRRADIATION TECHNIQUE IS ASSOCIATED TO THE LOWEST PERIPHERAL DOSE: THE OUTCOME OF 142 TREATMENT PLANS FOR THE 10 MOST COMMON TUMOUR LOCATIONS.

Radiat Prot Dosimetry 2019 Jan 11. Epub 2019 Jan 11.

Departamento de Fisiología Médica y Biofísica, Facultad de Medicina, Universidad de Sevilla, Sevilla, Spain.

There is a growing interest in the combined use of Stereotactic Body Radiation Therapy (SBRT) with Flattening Filter Free (FFF) due to the high local control rates and reduced treatment times, compared to conventionally fractionated treatments. It has been suggested that they may also provide a better radiation protection to radiotherapy patients as a consequence of the expected decrease in peripheral doses. This work aims to determine this reduction in unattended out-of-field regions, where no CT information is available but an important percentage of second primary cancers occur. Read More

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https://academic.oup.com/rpd/advance-article/doi/10.1093/rpd
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http://dx.doi.org/10.1093/rpd/ncy292DOI Listing
January 2019
7 Reads

DOSE RECONSTRUCTION FROM ESR SIGNAL OF GAMMA-IRRADIATED SODA-LIME GLASS FOR TRIAGE APPLICATION.

Radiat Prot Dosimetry 2019 Jan 11. Epub 2019 Jan 11.

Division of Physical Chemistry, Ruder Boškovic Institute, Bijenicka cesta 54, Zagreb, Croatia.

In this work, we report some preliminary results regarding the analysis of electron spin resonance (ESR) response of soda-lime samples used for retrospective dosimetry. Six different soda-lime glass batches were evaluated after irradiation. We compared several dose reconstruction techniques: saturation method, subtraction method and g-effective, geff, approach. Read More

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http://dx.doi.org/10.1093/rpd/ncy290DOI Listing
January 2019
6 Reads

RISK ASSESSMENT FOR RADON EXPOSURE IN VARIOUS INDOOR ENVIRONMENTS.

Authors:
Jing Chen

Radiat Prot Dosimetry 2019 Jan 9. Epub 2019 Jan 9.

Radiation Protection Bureau, Health Canada, 775 Brookfield Road, Ottawa, Ontario, Canada.

Using data from a number of radon surveys, it was assessed that on average, radon progeny concentrations in Canadian homes are about three times higher than in school buildings, 4.7 times higher than in public buildings and indoor workplaces, and 12 times higher than in outdoor air. Canadian statistics show that most Canadians spend ~70% of their time indoors at home, 20% indoors away from home and 10% in outdoors. Read More

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http://dx.doi.org/10.1093/rpd/ncy284DOI Listing
January 2019
3 Reads

OCCUPATIONAL EYE LENS DOSE ESTIMATED USING WHOLE-BODY DOSEMETER IN INTERVENTIONAL CARDIOLOGY AND RADIOLOGY: A MONTE CARLO STUDY.

Radiat Prot Dosimetry 2019 Jan 9. Epub 2019 Jan 9.

Vinca Institute of Nuclear Sciences, Department of Radiation and Environmental Protection, University of Belgrade, Belgrade, Serbia.

Medical personnel performing interventional procedures in cardiology and radiology is considered to be a professional group exposed to high doses of ionizing radiation. Reduction of the eye lens dose limit made its assessment in the interventional procedures one of the most challenging topics. The objective of this work is to assess eye lens doses based on the whole-body doses using methods of computational dosimetry. Read More

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http://dx.doi.org/10.1093/rpd/ncy283DOI Listing
January 2019
3 Reads

BIOPHOTONS IN RADIOBIOLOGY: INHIBITORS, COMMUNICATORS AND REACTORS.

Radiat Prot Dosimetry 2019 Jan 9. Epub 2019 Jan 9.

Medical Physics, McMaster University, 1280 Main Street West, Hamilton, ON, Canada.

Radiation-induced bystander effects refer to the production of signals from irradiated cells which induce responses in unirradiated, or bystander, cells. There has been a recent resurgence of interest in low-energy photon biology. This is due to concerns about health effects, increased use of biophoton imaging techniques, and the fact that biophotons can act as a bystander signal. Read More

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http://dx.doi.org/10.1093/rpd/ncy271DOI Listing
January 2019
8 Reads

RADIATION DOSE ESTIMATION BY COMPLETELY AUTOMATED INTERPRETATION OF THE DICENTRIC CHROMOSOME ASSAY.

Radiat Prot Dosimetry 2019 Jan 9. Epub 2019 Jan 9.

CytoGnomix, Inc., POB 27052, 60 N. Centre Rd, London, ON, Canada.

Accuracy of the automated dicentric chromosome (DC) assay relies on metaphase image selection. This study validates a software framework to find the best image selection models that mitigate inter-sample variability. Evaluation methods to determine model quality include the Poisson goodness-of-fit of DC distributions for each sample, residuals after calibration curve fitting and leave-one-out dose estimation errors. Read More

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http://dx.doi.org/10.1093/rpd/ncy282DOI Listing
January 2019
2 Reads

CALIBRATION OF LOW ENERGY X-RAY EXPERIMENTAL SETUP WITH STRONGLY FILTERED BEAM USING DATA FROM A SEMICONDUCTOR AND A THERMOLUMINESCENT DETECTORS.

Radiat Prot Dosimetry 2019 Jan 9. Epub 2019 Jan 9.

National Centre for Nuclear Research, ul. Andrzeja Soltana 7, Otwock, Swierk, Poland.

The calibration of low energy X-ray experimental setup with strongly filtered beam dedicated to radiobiological research was performed using the absorbed dose calculated from the data collected by two types detectors. For this purpose a semiconductor (Amptek, USA) and a thermoluminescent (Institute of Nuclear Physics, Krakow, Poland) detectors were applied. The absorbed dose in water values estimated by both detectors are in good agreement. Read More

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http://dx.doi.org/10.1093/rpd/ncy291DOI Listing
January 2019
3 Reads

OCCUPATIONAL EXPOSURE TO EXTERNAL IONISING RADIATION IN TANZANIA (2011-17).

Radiat Prot Dosimetry 2019 Jan 9. Epub 2019 Jan 9.

Ionizing Radiation Department, Tanzania Atomic Energy Commission, 23114 Block J Njiro, United Republic of Tanzania.

The objectives of this paper were to evaluate the occupational radiation exposure data from 2011 to 2017 and to compare the results with status in 1996-2010 periods. The evaluation was performed in terms of annual collective effective dose, the average annual effective dose, the individual dose distribution ratio and the annual collective effective dose distribution ratio. Irrespective of work category, the results indicate that the average effective dose ranged from 0. Read More

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https://academic.oup.com/rpd/advance-article/doi/10.1093/rpd
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http://dx.doi.org/10.1093/rpd/ncy297DOI Listing
January 2019
9 Reads

CHARACTERIZATION OF A LITHIUM FORMATE EPR-DOSIMETRY SYSTEM FOR PROTON RADIATION THERAPY.

Radiat Prot Dosimetry 2019 Jan 9. Epub 2019 Jan 9.

Department of Medicine and Health Sciences, Linköping University, Linköping, Sweden.

The specific aim for the characterization of the lithium formate dosimetry system is to determine response and stability in a proton beam. The long-term goal for this investigation is an audit system for proton therapy like the end-to-end dose determinations performed for radiotherapy with photons. For a 150-MeV proton beam, the dose response was found to be linear in the dose interval 0-8. Read More

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http://dx.doi.org/10.1093/rpd/ncy293DOI Listing
January 2019
2 Reads

OCCUPATIONAL RADIATION EXPOSURE OF THE EYE IN NEUROVASCULAR INTERVENTIONAL PHYSICIAN.

Radiat Prot Dosimetry 2019 Jan 9. Epub 2019 Jan 9.

Department of Radiology and Nuclear Medicine, Research Institute for Brain & Blood Vessels-Akita.

Neurovascular interventional radiology (neuro-IR) procedures tend to require an extended fluoroscopic exposure time and repeated digital subtraction angiography. To evaluate the actual measurement of eye lens dose using a direct eye dosemeter in neuro-IR physicians is important. Direct dosimetry using the DOSIRIS™ (IRSN, France) [3 mm dose equivalent, Hp(3)] was performed on 86 cases. Read More

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http://dx.doi.org/10.1093/rpd/ncy285DOI Listing
January 2019
2 Reads

ESTIMATION OF RBE VALUES FOR CARBON-ION BEAMS IN THE WIDE DOSE RANGE USING MULTICELLULAR SPHEROIDS.

Radiat Prot Dosimetry 2019 Jan 9. Epub 2019 Jan 9.

Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan.

Hypofractionated carbon-ion therapy has been applied to treatment of several tumours. In this case, relative biological effectiveness (RBE) at high dose region must be considered, however, the RBE calculated physically has been not verified biologically. In this study, spheroid technique was adopted to estimate RBE in wide dose range. Read More

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http://dx.doi.org/10.1093/rpd/ncy269DOI Listing
January 2019
3 Reads

BAYESIAN SPECTRUM DECONVOLUTION INCLUDING UNCERTAINTIES AND MODEL SELECTION: APPLICATION TO X-RAY EMISSION DATA USING WINBUGS.

Radiat Prot Dosimetry 2019 Jan 9. Epub 2019 Jan 9.

Physikalisch-Technische Bundesanstalt, Bundesallee 100, Braunschweig, Germany.

Spectrum deconvolution is an important task in ionizing radiation measurements, as the pulse height spectra, or, in general, the measured data from spectrometers or other measuring instruments are usually determined by the convolution of the response function with the fluence spectra. The method presented here for obtaining fluence spectra from the measurements is an application of Bayesian parameter estimation to the deconvolution of X-ray emission data. The problem of choosing the optimal model among several possible models is also considered, as well as an approach to include contributions from various sources of uncertainty, both correlated and uncorrelated. Read More

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http://dx.doi.org/10.1093/rpd/ncy286DOI Listing
January 2019
2 Reads

ESTIMATION OF ORGAN DOSES AND EFFECTIVE DOSES BASED ON IN-PHANTOM DOSIMETRY FOR PAEDIATRIC DIAGNOSTIC CARDIAC CATHETERISATION.

Radiat Prot Dosimetry 2019 Jan 9. Epub 2019 Jan 9.

Department of Radiological Technology, Kanagawa Children's Medical Centre, Mutsukawa 2-138-4, Minami-ku, Yokohama, Japan.

The present study evaluated the organ doses, effective doses and conversion factors from the dose-area product to effective dose in pediatric diagnostic cardiac catheterization performed by in-phantom dosimetry and Monte Carlo simulation. The organ and effective doses in 5-y-olds during diagnostic cardiac catheterizations were evaluated using radiophotoluminescence glass dosemeters implanted into a pediatric anthropomorphic phantom and PCXMC software. The mean effective dose was 3. Read More

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http://dx.doi.org/10.1093/rpd/ncy298DOI Listing
January 2019
3 Reads

EFFECTIVE DOSE ESTIMATION FROM ORGAN DOSE MEASUREMENTS IN FAST-kV SWITCH DUAL ENERGY COMPUTED TOMOGRAPHY.

Radiat Prot Dosimetry 2018 Dec;182(3):352-358

Duke Radiation Dosimetry Laboratory, Duke University Medical Center, Durham, NC, USA.

The purpose of this study was to validate a novel approach to estimating effective dose (E) in 'fast-kV switch dual energy computed tomography' using MOSFET detectors. The effective energy of the combined dual energy environment was characterized with the dual energy CT scanner and then MOSFETs were calibrated matching to the effective energy of the dual energy CT beam with a conventional CT beam. The calibration method was then experimentally validated by comparing the dose between MOSFET and an ion chamber (IC) using a standard CTDI body phantom. Read More

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http://dx.doi.org/10.1093/rpd/ncy072DOI Listing
December 2018
3 Reads

EFFECTIVE RADIATION DOSE TO STAFF MEMBERS DUE TO MYOCARDIAL PERFUSION SPECT IMAGING: TRACKING THE EXPOSURE FROM PREPARATION TO PATIENT RELEASE.

Radiat Prot Dosimetry 2018 Dec;182(3):345-351

Division of Medical Biophysics, Department of Physics, Faculty of Science, Helwan University, Cairo, Egypt.

The aim of the work was to tack the radiation exposure from dose preparation down to patient release during nuclear cardiac imaging. A total of 111 patients were recruited and external exposure was measured using a standard calibrated survey meter. Five phases have been determined including dose preparation, injection, post-injection, patient setup and patient release. Read More

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http://dx.doi.org/10.1093/rpd/ncy071DOI Listing
December 2018
3 Reads

IMPACT ON ABSORBED DOSE RATE IN AIR IN THE IZU ISLANDS FROM LONG HALF-LIFE RADIONUCLIDES RELEASED BY THE FUKUSHIMA DAIICHI NUCLEAR POWER PLANT ACCIDENT.

Radiat Prot Dosimetry 2018 Dec;182(3):335-344

Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10 Higashiogu, Arakawa-ku, Tokyo, Japan.

Car-borne surveys were carried out on eight islands of the Izu Islands located 339-570 km southwest of the Fukushima Daiichi Nuclear Power Plant. The mean dose rates measured in 2015, 2016 or 2017 on each island were from 12 to 47 nGy h-1, meaning that the contribution ratios of artificial radionuclides were 5-31%. Based on the environmental half-life for long half-life radionuclides (134Cs + 137Cs) measured on Izu-Oshima (3. Read More

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http://dx.doi.org/10.1093/rpd/ncy070DOI Listing
December 2018
2 Reads

IMPLEMENTATION OF QUALITY ASSURANCE PROGRAM IN RADIOGRAPHY-2-YEAR EXPERIENCE OF COLLABORATION WITH PUBLIC HEALTH INSTITUTIONS IN WEST REGION OF CROATIA.

Radiat Prot Dosimetry 2018 Dec;182(3):329-334

Medical Physics Department, Clinical Hospital Centre Rijeka, Krešimirova 42, Rijeka, Croatia.

Quality Assurance program on using ionizing radiation is mandatory in all EU member states but this is still not implemented in most facilities in Croatia mostly because of a lack of medical physicists in diagnostic radiology. Since public health institutions in Croatia do not employ medical physicists in diagnostic radiology, collaboration between these institutions in west region of Croatia with Clinical Hospital Center Rijeka (CHC) was initiated during the year 2015. Physicists from CHC Rijeka performed periodical Quality Control (QC) tests and were included in optimization process. Read More

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http://dx.doi.org/10.1093/rpd/ncy069DOI Listing
December 2018
3 Reads

EYE LENS RADIATION EXPOSURE OF WORKERS DURING MEDICAL INTERVENTIONAL PROCEDURES AND SURGERY.

Radiat Prot Dosimetry 2018 Dec;182(3):323-328

Service de Protection Radiologique des Armées (SPRA), Hôpital d'Instruction des Armées (HIA) Percy, 101 Avenue Henri Barbusse, Clamart, France.

To evaluates the eye-lens radiation exposure of workers during medical interventional procedures and surgery in a military hospital as well as of the equine veterinarians. The measures represent the exposure in a normal workload schedule of ninety randomly selected workers over a 3-month period, extrapolated to 1 year. The eye-lens dosemeters were placed near the eye closest to the radiation source (Carinou, E. Read More

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http://dx.doi.org/10.1093/rpd/ncy068DOI Listing
December 2018
3 Reads

EURADOS 2016 INTERCOMPARISON EXERCISE OF EYE LENS DOSEMETERS.

Radiat Prot Dosimetry 2018 Dec;182(3):317-322

Universitat Politécnica de Catalunya (UPC), Diagonal 647, Barcelona, Spain.

In the context of a new annual eye lens dose limit for occupational exposure equal to 20 mSv, European Radiation Dosimetry Group (EURADOS) organized an intercomparison dedicated to eye lens dosemeters, including photon and beta radiations. The objective was to complete the first intercomparison recently organized by EURADOS for photons and to update the overview of eye lens dosemeters available in Europe. The dosemeters provided by the 22 participants coming from 12 countries were all composed of thermoluminescent detectors. Read More

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https://academic.oup.com/rpd/article/182/3/317/4993071
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http://dx.doi.org/10.1093/rpd/ncy067DOI Listing
December 2018
18 Reads

RADIATION DOSE AND IMAGE QUALITY IN PEDIATRIC HEAD CT.

Radiat Prot Dosimetry 2018 Dec;182(3):310-316

Department of Radiology and Radiological Science, Medical University of South Carolina, 96 Jonathan Lucas Street, MSC 323, Charleston, SC, USA.

Our goal was to define a pediatric head CT protocol able to provide images of diagnostic quality, using the least amount of radiation, in children <10 years of age, while using a filtered back projection reconstruction algorithm. Image quality of 119 pediatric head CTs was assessed using a 5-point scoring system. Exams with scores ≥2. Read More

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http://dx.doi.org/10.1093/rpd/ncy066DOI Listing
December 2018
3 Reads

RECOMMENDATIONS FOR MONITORING AND INTERNAL DOSIMETRY FOR NUCLEAR MEDICINE STAFF EXPOSED TO RADIOPHARMACEUTICALS 223Ra DICHLORIDE.

Radiat Prot Dosimetry 2018 Dec;182(3):299-309

Service de Protection Radiologique des Armées, 1bis rue du Lieutenant Raoul Batany, CS500 57, Clamart Cedex, France.

223Ra is a radiopharmaceutical used as unsealed source in nuclear medicine. In the case of staff inhalation contamination of 223Ra, methods to estimate the committed effective dose should be chosen with care. Three methods are available: whole-body measurement and gamma spectrometry for urine or faeces samples. Read More

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http://dx.doi.org/10.1093/rpd/ncy065DOI Listing
December 2018
2 Reads

INITIAL EVALUATION OF INDIVIDUAL DOSES IN THE EARLY PHASE OF A NUCLEAR REACTOR ACCIDENT BASED ON IN-VIVO MONITORING DATA AND SIMULATED RADIOLOGICAL CONSEQUENCES.

Radiat Prot Dosimetry 2018 Dec 27. Epub 2018 Dec 27.

Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-SANTE/SDOS/LEDI, PSE-SANTE/SESUC/BMCA, PSE-SANTE, PSE-ENV/SAME, BP 17, Fontenay-aux-Roses, France.

In the early phase of a nuclear reactor accident, in-vivo monitoring of impacted population would be highly useful to detect potential contamination during the passage of the cloud and to estimate the dose from inhalation of measured radionuclides. However, it would be important to take into account other exposure components: (1) inhalation of unmeasured radionuclides and (2) external irradiation from the plume and from the radionuclides deposited on the soil. This article presents a methodology to calculate coefficients used to convert in-vivo measurement results directly into doses, not only from the measured radionuclides but from all sources of exposure according to model-based projected doses. Read More

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http://dx.doi.org/10.1093/rpd/ncy277DOI Listing
December 2018
5 Reads

ESTIMATE OF UAE COMMERCIAL AIRCREW EFFECTIVE DOSES USING CARI-6, EPCARD AND SIEVERT CODES.

Radiat Prot Dosimetry 2018 Dec 26. Epub 2018 Dec 26.

Department of Environmental Health Sciences, University of Sharjah, Sharjah, UAE.

The aim of this study is to calculate total cruising route effective doses using three commonly used algorithm codes CARI-6, EPCARD and SIEVERT. Further, the impact of flight cruising duration, altitude and latitude on the estimated effective doses will also be investigated. A total of 24 commercial UAE flight data were collected and retrospectively analysed. Read More

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http://dx.doi.org/10.1093/rpd/ncy280DOI Listing
December 2018
4 Reads

INVESTIGATION OF APPLICABILITY OF PURE PROPANE GAS FOR MICRODOSIMETRY AT NEUTRON FIELDS: A MONTE CARLO STUDY.

Radiat Prot Dosimetry 2018 Dec 20. Epub 2018 Dec 20.

Radiological Physics and Advisory Division, Health, Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai, Maharashtra, India.

Applicability of pure propane gas for microdosimetric measurements in neutron fields was investigated using the FLUKA Monte Carlo code. Monoenergetic neutrons in the energy range 1 keV-20 MeV and the ISO-neutron sources such as 241Am-Be, 241Am-B, 252Cf and 252Cf + D2O were considered in the present study. The tissue-equivalent proportional counter (TEPC) simulated in the study was LET-1/2 (by Far West Technology) with site sizes 1, 2 and 8 μm. Read More

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http://dx.doi.org/10.1093/rpd/ncy261DOI Listing
December 2018
2 Reads

CAPABILITIES OF THE ARADOS-WG03 REGIONAL NETWORK FOR LARGE-SCALE RADIOLOGICAL AND NUCLEAR EMERGENCY SITUATIONS IN AISA.

Radiat Prot Dosimetry 2018 Dec 20. Epub 2018 Dec 20.

Osaka Prefacture University, Osaka, Japan.

In 2015, the Asian Radiation Dosimetry Group established a regional network of biological dosimetry laboratories known as the ARADOS-WG03 (Working Group 03; Biological Dosimetry). A survey was conducted in 2017 to evaluate the capabilities and capacities of the participating laboratories for emergency preparedness and responses in large-scale nuclear and/or radiological incidents. The results of this survey were identified and assessed. Read More

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http://dx.doi.org/10.1093/rpd/ncy279DOI Listing
December 2018
4 Reads

NON-TARGETED EFFECTS LEAD TO A PARIDIGM SHIFT IN RISK ASSESSMENT FOR A MISSION TO THE EARTH'S MOON OR MARTIAN MOON PHOBOS.

Radiat Prot Dosimetry 2018 Dec 20. Epub 2018 Dec 20.

Physics Department, Prairie View A&M, Prairie View, TX, USA.

Cancer risk is an important limitation for galactic cosmic ray (GCR) exposures, which consist of a wide-energy range of protons, heavy ions and secondary radiation produced in shielding and tissues. Many studies suggest non-targeted effects (NTEs) occur for low doses of high-linear energy transfer (LET) radiation, leading to deviation from the linear dose response model used in radiation protection. We investigate corrections to quality factors (QF) for NTEs, which are used in predictions of fatal cancer risks for exploration missions. Read More

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http://dx.doi.org/10.1093/rpd/ncy264DOI Listing
December 2018
2 Reads

CONTRIBUTION OF BIODOSIMETRY TO DIFFERENT MEDICAL ISSUES.

Radiat Prot Dosimetry 2018 Dec 20. Epub 2018 Dec 20.

Bundeswehr Institute of Radiobiology, Munich, Germany.

Biodosimetry is a well-established field in science as well as diagnostics and is essential in various areas of application such as dose reconstruction after an accidental radiation exposure. However, depending on the medical issue the purpose of biodosimetry might differ. In this presentation, we will discuss about the contribution of biodosimetry regarding three medical subjects such as (i) diagnosis of acute effects after ionising radiation (Acute Radiation Syndrome), (ii) impact in the field of conventional and molecular epidemiology and (iii) occupational medicine. Read More

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http://dx.doi.org/10.1093/rpd/ncy278DOI Listing
December 2018
2 Reads

DIFFERENCE IN DEGREE OF SUB-LETHAL DAMAGE RECOVERY BETWEEN CLINICAL PROTON BEAMS AND X-RAYS.

Radiat Prot Dosimetry 2018 Dec 20. Epub 2018 Dec 20.

Radiation Oncology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan.

Fractionated proton beam radiotherapy is spreading worldwide these days. However, biological data of sub-lethal damage recovery (SLDR) after proton irradiation is not known yet. We here conducted split-dose experiments (20-360 min intervals) to clarify SLDR kinetics, and also compared the kinetics between cells with different repairability of DNA double-strand breaks. Read More

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http://dx.doi.org/10.1093/rpd/ncy270DOI Listing
December 2018
3 Reads

COMMENT ON THE PAPER 'LUMINESCENCE MODELS BY S.W.S. MCKEEVER AND R. CHEN, RADIATION MEASUREMENTS 27(5/6), 1997, pp. 625-661'.

Radiat Prot Dosimetry 2018 Dec 19. Epub 2018 Dec 19.

Nuclear Physics Laboratory, Physics Department, Aristotle University of Thessaloniki, Thessaloniki, Greece.

The present comment concerns the correct presentation of the equations giving the CW-OSL intensity in the case of second- and general-order kinetics. Those equations have also been published with their wrong formulation in two eminent books in their topic. Since most researchers (especially early stage) would use directly the proposed functions as published in the various sources, they should be notified of their correct formulation. Read More

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http://dx.doi.org/10.1093/rpd/ncy281DOI Listing
December 2018
3 Reads

TOWARDS THE USE OF NANODOSIMETRY TO PREDICT CELL SURVIVAL.

Radiat Prot Dosimetry 2018 Dec 19. Epub 2018 Dec 19.

INFN-Legnaro National Laboratories, viale dell'Università 2, Legnaro, Italy.

Experimental nanodosimetry aims to develop a new concept of radiation quality, based on the correlation between initial features of particle tracks and late biological outcome. A direct proportionality has been observed between the cumulative probability of measuring at least k ionisations within a nanometric volume and inactivation cross sections at specific survival levels. Based on this proportionality, physical quantities which are measurable at the nanometre level can be used to estimate the alpha and beta parameters of the linear-quadratic dose-response model, provided that two proportionality factors are determined in a reference radiation field. Read More

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http://dx.doi.org/10.1093/rpd/ncy274DOI Listing
December 2018
2 Reads

THE ROLE OF PARTICLE SPECTRA IN MODELING THE RELATIVE BIOLOGICAL EFFECTIVENESS OF PROTON RADIOTHERAPY BEAMS.

Radiat Prot Dosimetry 2018 Dec 19. Epub 2018 Dec 19.

Medical Radiation Physics, Dept. of Physics, Stockholm University, Stockholm, Sweden.

Radiotherapy beams of protons or heavier ions generate secondary particles through nuclear interactions over different patient tissues. The resulting particle spectra depend on the tissue composition and on charge and energy of the primary beam ions. In proton radiotherapy, predictive radiobiological models usually apply dose-averaged linear energy transfer (LET). Read More

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http://dx.doi.org/10.1093/rpd/ncy268DOI Listing
December 2018
3 Reads