7,243 results match your criteria Radiation Protection Dosimetry [Journal]


CONVERSION COEFFICIENTS FROM AIR KERMA TO DIRECTIONAL DOSE EQUIVALENT H'(0.07) FOR PHOTONS.

Radiat Prot Dosimetry 2019 Apr 24. Epub 2019 Apr 24.

Seibersdorf Labor GmbH, 2444 Seibersdorf, Austria.

New conversion coefficients from air kerma free-in-air, Ka, to directional dose equivalent at 0.07mm depth, H'(0.07), are provided for monoenergetic values and for the spectra of the radiation qualities defined in ISO 4037-1. Read More

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http://dx.doi.org/10.1093/rpd/ncz060DOI Listing

CONTEMPORARY RADIATION DOSES IN INTERVENTIONAL CARDIOLOGY: A NATIONWIDE STUDY OF PATIENT DOSES IN FINLAND.

Radiat Prot Dosimetry 2019 Apr 16. Epub 2019 Apr 16.

Department of Medical Physics, Turku University Hospital, Turku, Finland.

The amount of interventional procedures such as percutaneous coronary intervention (PCI), transcatheter aortic valve implantation (TAVI), pacemaker implantation (PI) and ablations has increased within the previous decade. Simultaneously, novel fluoroscopy mainframes enable lower radiation doses for patients and operators. Therefore, there is a need to update the existing diagnostic reference levels (DRLs) and propose new ones for common or recently introduced procedures. Read More

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http://dx.doi.org/10.1093/rpd/ncz041DOI Listing
April 2019
1 Read

OCCUPATIONAL RADIATION DOSE TO NUCLEAR MEDICINE STAFF DUE TO TC99M, F18-FDG PET AND THERAPEUTIC I-131 BASED EXAMINATIONS.

Radiat Prot Dosimetry 2019 Apr 16. Epub 2019 Apr 16.

Department of Biophysics, Faculty of Science, Cairo University, Giza, Egypt.

The aim was to track the exposure to radiation workers in six nuclear medicine examinations. A number of 180 patients were recruited and external exposure was measured. Patients had undergone cardiac stress and rest, bone scan, I-131 therapy, Gallium-67 and FDG PET/CT imaging. 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/ncz046DOI Listing
April 2019
1 Read

ASSESSMENT OF RADIOLOGICAL HAZARDS OF USING PETROLEUM RAW MATERIALS AND THEIR WASTE.

Radiat Prot Dosimetry 2019 Apr 15. Epub 2019 Apr 15.

Calibration and Radiation Dosimetry Division, Radiation Protection Department, Ministry of Health, Kuwait.

Activity concentrations of 238U, 232Th and 40K in raw and waste petroleum materials (Egypt and Kuwait) were measured using gamma ray spectrometer. The average values of 226Ra, 232Th and 40K were 21.1 ± 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/ncz043DOI Listing
April 2019
5 Reads

APPLICATION OF THE EUROPEAN PROTOCOL IN THE EVALUATION OF DIGITAL MAMMOGRAPHY UNITS WITH TUNGSTEN TARGET TUBES.

Authors:
M Borg

Radiat Prot Dosimetry 2019 Apr 15. Epub 2019 Apr 15.

Medical Imaging Department, Mater Dei Hospital, Msida, Malta.

The performance of the first direct digital mammography unit in Gozo General Hospital, the Hologic Selenia Dimensions 2D, was assessed by applying the European Protocol for quality control in mammography screening. This system employs a Tungsten anode in association with a Rhodium or Silver filter, depending on the compressed breast thickness. The objective of this article was to apply the European Protocol in the evaluation of this system in terms of dose, image quality and detector performance and determine whether this system is suitable for use in the national breast-screening program. Read More

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http://dx.doi.org/10.1093/rpd/ncz044DOI Listing

END-TO-END AUDIT: COMPARISON OF TLD AND LITHIUM FORMATE EPR DOSIMETRY.

Radiat Prot Dosimetry 2019 Mar 31. Epub 2019 Mar 31.

Department of Medical and Health Sciences, Linköping University, SE-581 85 Linköping, Sweden and Department of Medical Radiation Physics and Nuclear Medicine, Section for Radiotherapy Physics and Engineering, Karolinska University Hospital, SE-171 76 Stockholm, Sweden.

The aim of this study was to test two different solid state dosimetry systems for the purpose of end-to-end audits of radiotherapy volumetric modulated arc therapy (VMAT) technique; a lithium formate electron paramagnetic resonance system and a lithium fluoride thermoluminescent dosimetry system. As a complement to the solid state systems, ion chamber measurements were performed. A polystyrene phantom with a planning target volume (PTV) and an organ at risk (OAR) structure was scanned using CT. Read More

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http://dx.doi.org/10.1093/rpd/ncy289DOI Listing
March 2019
4 Reads

A DISCUSSION ON ISSUES WITH RADON IN DRINKING WATER.

Authors:
Jing Chen

Radiat Prot Dosimetry 2019 Mar 31. Epub 2019 Mar 31.

Radiation Protection Bureau, Health Canada, 775 Brookfield Road, Ottawa K1A 1C1, Canada.

The majority of the world's population relies on surface water or large public supply systems of groundwater, where radon is low and a guidance value for radon in drinking water is not necessary. However, the International Commission on Radiological Protection (ICRP) recently issued a dose coefficient for radon ingestion, raising questions among some radiation protection authorities about whether radon guidance values should be calculated for drinking water and how this might be done. Unlike many other radionuclides considered in drinking water management, radon has special characteristics and therefore requires special considerations. Read More

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http://dx.doi.org/10.1093/rpd/ncz035DOI Listing
March 2019
2 Reads

DO THE BMI AND SURGEON INFLUENCE THE PATIENT DOSE IN FLUOROSCOPICALLY GUIDED LUMBAR DISCECTOMY AND FUSION?☆.

Radiat Prot Dosimetry 2019 Mar 27. Epub 2019 Mar 27.

Department of Medical Physics, School of Medicine, University of Patras, 265 04 Patras, Greece.

A survey was conducted to evaluate the role of the surgeon and the patients' body size, on patient radiation dose in fluoroscopically guided lumbar discectomy and fusion (LDF) procedures. Fluoroscopy time (FT), kerma area product (KAP), cumulative dose (CD), as well as anatomical and technical data were recorded for 100 patients, who underwent single or multi-level posterior LDF, which was carried out by three senior neurosurgeons utilising a C-arm fluoroscopy system. The patients were divided into three groups based on the body mass index (BMI) values (normal, overweight, obese) and the neurosurgeon that performed each procedure (surgeon 1, surgeon 2, surgeon 3). Read More

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http://dx.doi.org/10.1093/rpd/ncz039DOI Listing
March 2019
3 Reads

DENTAL INTRAORAL EXPOSURES IN PORTUGAL: FROM 1990 TO 2018.

Radiat Prot Dosimetry 2019 Mar 27. Epub 2019 Mar 27.

MedicalConsult, Lda., 2560 Torres Vedras, Portugal.

Data from dental intraoral radiography quality controls was gathered from 1201 units (22% of the licensed X-ray units existing in Portugal), using film and digital image systems, between 2016 and 2018. The median incident air KERMA for standard superior molar tooth was evaluated in 0.9 mGy with the value of 1. Read More

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http://dx.doi.org/10.1093/rpd/ncz033DOI Listing
March 2019
2 Reads

MEASUREMENT OF OPERATIONAL QUANTITIES Hp(0.07) AND Hp(3) FOR INDIGENOUSLY DEVELOPED 106Ru/106Rh SOURCE USING AN EXTRAPOLATION CHAMBER.

Radiat Prot Dosimetry 2019 Mar 27. Epub 2019 Mar 27.

Radiological Physics & Advisory Division, Bhabha Atomic Research Centre (BARC), Mumbai, India.

In the present study, a prototype 106Ru/106Rh source was fabricated using high level liquid waste from reactor fuel, fixed in a stainless steel housing with a window and backing made of silver. The study involves measurement of the operational quantities Hp(0.07), Hp(3) and the percentage depth dose (PDD) using an extrapolation chamber. Read More

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http://dx.doi.org/10.1093/rpd/ncz024DOI Listing
March 2019
4 Reads

VALIDATION OF A BEAMNRC MONTE CARLO SIMULATION OF A BROAD BEAM DIAGNOSTIC X-RAY UNIT.

Radiat Prot Dosimetry 2019 Mar 27. Epub 2019 Mar 27.

Department of Medical Physics, Ninewells Hospital and Medical School, Ninewells Avenue, Dundee DD1 9SY, UK.

A BEAMnrc Monte Carlo simulation of a diagnostic X-ray unit in a broad beam geometry intended for the derivation of effective linear attenuation coefficients was validated against measurements made on the X-ray unit on which the simulation was based. The validation process assessed the size of the beam, the first and second half value layer, the variation in kerma with anode-heel effect and the accuracy of values of effective linear attenuation coefficient for water and solid water attenuators. The agreement between the simulated and measured results for all tests was consistently within the experimental uncertainty for the measurements. Read More

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http://dx.doi.org/10.1093/rpd/ncz032DOI Listing
March 2019
2 Reads

CLINICAL APPLICATIONS OF BIOMARKERS OF RADIATION EXPOSURE: LIMITATIONS AND POSSIBLE SOLUTIONS THROUGH COORDINATED RESEARCH.

Radiat Prot Dosimetry 2019 Mar 27. Epub 2019 Mar 27.

The International Atomic Energy Agency, P.O. Box 100, Wagramerstrasse 5, Vienna, Austria.

Dosimetric biomarkers have been effectively and intensively used for a long time in the area of radiation protection. In contrast to that, no robust standards or widely accepted protocols for application of these end-points in radiotherapy, diagnostic and interventional radiology and nuclear medicine exist to date. The International Atomic Energy Agency (IAEA) organized the review of the available data on the possibilities of the use of dosimetric biomarkers in medical irradiation scenarios. Read More

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http://dx.doi.org/10.1093/rpd/ncz038DOI Listing
March 2019
3 Reads

RADIOACTIVITY OF SOIL IN THE REGION OF THE TOWN OF NIŠ, SERBIA.

Radiat Prot Dosimetry 2019 Mar 27. Epub 2019 Mar 27.

Faculty of Science, Department of Physics, University of Kragujevac, 12 R. Domanovića Str., 34000 Kragujevac, Serbia.

The concentration of radionuclides in samples of soil collected in the region of the town of Niš, was measured and presented in this paper. The naturally occurring radionuclides, 226Ra, 232Th and 40K, were found in all samples. In many of them, 137Cs was also measured, while the other artificial radionuclides were not detected. Read More

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http://dx.doi.org/10.1093/rpd/ncz034DOI Listing
March 2019
3 Reads

DOSE BENCHMARKS FOR PAEDIATRIC HEAD COMPUTED TOMOGRAPHY EXAMINATION IN NIGERIA.

Radiat Prot Dosimetry 2019 Mar 27. Epub 2019 Mar 27.

Department of Radiography and Radiological Sciences, Faculty of Allied Medical Sciences, University of Calabar, PMB 1115 Calabar, Nigeria.

Diagnostic reference levels (DRLs) provide benchmarks for dose optimisation. We aimed to propose DRLs for paediatric head computed tomography (CT) in Nigeria and assess if facilities adapt protocols to age-specific standardisations. Volume CT dose index (CTDIvol) and dose-length-product (DLP) of at least 20 paediatric patients per age group were extracted from 11 facilities and used to propose DRLs. Read More

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http://dx.doi.org/10.1093/rpd/ncz036DOI Listing
March 2019
4 Reads

OPTIMIZING IMAGE QUALITY, RADIATION DOSAGE TO THE PATIENT AND TO THE DETECTOR IN PEDIATRIC CHEST RADIOGRAPHY: A PHANTOM STUDY OF A PORTABLE DIGITAL RADIOGRAPHY SYSTEM.

Radiat Prot Dosimetry 2019 Mar 27. Epub 2019 Mar 27.

Centre for Research and Development, Uppsala University/Region Gävleborg, 80188 Gävle, Sweden.

The present work aimed to optimize exposure settings in pediatric digital chest radiography (DR) with regard to image quality and radiation dosage. A pediatric phantom was imaged with a portable DR unit to examine different exposure settings (range: 75-109 kVp; 0.3-1. Read More

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http://dx.doi.org/10.1093/rpd/ncz028DOI Listing
March 2019
4 Reads

SHAPE ESTIMATION OF BOWTIE FILTERS BASED ON THE LUMINESCENCE FROM POLYETHYLENE TEREPHTHALATE RESIN BY X-RAY IRRADIATION.

Radiat Prot Dosimetry 2019 Mar 21. Epub 2019 Mar 21.

Department of Radiological Technology, School of Health Sciences, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya 461-8673, Japan.

In this study, we devised a novel method estimating the bowtie filter shapes by imaging luminescence from a polyethylene terephthalate (PET) resin with X-ray irradiation in a computed tomography (CT) scanner. The luminescence distribution of the PET resin corresponding to the thickness of bowtie filter was imaged using a charge-coupled device camera. On the assumption that the material of bowtie filter is aluminium (Al), the shape of bowtie filters was estimated from the correlation between Al attenuation curves and the angular-dependent luminance attenuation profiles according to the thickness of bowtie filters. Read More

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http://dx.doi.org/10.1093/rpd/ncz031DOI Listing
March 2019
3 Reads

SIMULTANEOUS INDOOR RADON, THORON AND THORON PROGENY MEASUREMENTS IN BETARE-OYA GOLD MINING AREAS, EASTERN CAMEROON.

Radiat Prot Dosimetry 2019 Mar 21. Epub 2019 Mar 21.

Department of Radiation Physics, Hirosaki University, Institute of Radiation Emergency Medicine, 66-1 Honcho, Hirosaki-shi, Aomori 036-8564, Japan.

Indoor radon (Rn), thoron (Tn) and thoron progeny (TnP) were simultaneously measured in the gold mining areas of Betare-Oya using RADUET detectors and TnP monitors. Rn and Tn concentrations range between 88-282 and 4-383 Bq m-3, respectively, with the arithmetic means of 133 ± 39 and 93 ± 76 Bq m-3. The 76% of houses for Rn and 25% for Tn exceed the WHO reference level of 100 Bq m-3 and 3% of the houses exceed the ICRP threshold of 300 Bq m-3. Read More

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http://dx.doi.org/10.1093/rpd/ncz026DOI Listing
March 2019
3 Reads

OPTIMISATION OF SWALLOWING CT EXAMINATION: DOSE REDUCTION AND IMAGE QUALITY.

Radiat Prot Dosimetry 2019 Mar 21. Epub 2019 Mar 21.

Graduate School of Health Sciences, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, Japan.

This study sought to optimise the swallowing computed tomography (SCT) scan protocol for use with the new wide-area detector-row CT (ADCT) scanner and to estimate patient dose in terms of the organ-absorbed dose and the effective dose. The conventional ADCT (ADCTViSION) and the new ADCT (ADCTGENESIS) scanner were compared using: (1) the organ-absorbed dose and the effective dose, with a phantom study, (2) the detailed organ-absorbed doses of the neck region, using a Monte Carlo simulation and (3) a relative visual quality analysis. The effective energy differed significantly between the ADCTViSION (50 keV) and the ADCTGENESIS (57 keV). Read More

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http://dx.doi.org/10.1093/rpd/ncz029DOI Listing
March 2019
3 Reads

EFFECTIVE DOSES ESTIMATED FROM THE RESULTS OF DIRECT RADON AND THORON PROGENY SENSORS (DRPS/DTPS), EXPOSED IN SELECTED REGIONS OF BALKANS.

Radiat Prot Dosimetry 2019 Mar 13. Epub 2019 Mar 13.

National Institutes for Quantum and Radiological Science and Technology, National Institute of Radiological Sciences, 263-8555 Chiba, Japan.

The main contribution to population exposure is due to radon and thoron progenies and not radon itself. The aim of this study was therefore to estimate annual effective dose using the results of Direct Radon and Thoron Progeny Sensors were exposed in 69 selected schools and 319 dwellings in several regions of Balkans: in Serbia: regions of Sokobanja and Kosovo and Metohija, Republic of Macedonia, Republic of Srpska and Slovenia. Obtained average total effective doses are in the range from 0. Read More

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http://dx.doi.org/10.1093/rpd/ncz025DOI Listing
March 2019
3 Reads

A PHANTOM STUDY TO DETERMINE THE OPTIMAL PLACEMENT OF EYE DOSEMETERS ON INTERVENTIONAL CARDIOLOGY STAFF.

Radiat Prot Dosimetry 2019 Mar 13. Epub 2019 Mar 13.

Department of Radiological Examination and Technology, Tohoku University Graduate School of Medicine, 2-1 Seiryo, Aoba-ku, Sendai 980-8575, Japan.

The International Commission on Radiological Protection has substantially reduced the recommended maximum annual eye lens dose for workers. Use of a dedicated eye dosemeter is one method for accurate dose monitoring. The main aim of this study was to yield recommendations for optimal placement of eye dosemeters to estimate the eye dose to interventional cardiology physicians and nurses. 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/ncz027DOI Listing
March 2019
8 Reads

S VALUES FOR NEUROIMAGING PROCEDURES ON KOREAN PEDIATRIC AND ADULT HEAD COMPUTATIONAL PHANTOMS.

Radiat Prot Dosimetry 2019 Mar 13. Epub 2019 Mar 13.

Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Rockville, MD 20850, USA.

Over the past decades, the application of single-photon emission computed tomography and positron emission tomography in neuroimaging has markedly increased. In the current study, we used a series of Korean computational head phantoms with detailed cranial structures for 6-, 9-, 12-, 15-y-old children and adult and a Monte Carlo transport code, MCNPX, to calculate age-dependent specific absorbed fraction (SAF) for mono-energetic electrons ranging from 0.01 to 4 MeV and S values for seven radionuclides widely used in nuclear medicine neuroimaging for the combination of ten source and target regions. Read More

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http://dx.doi.org/10.1093/rpd/ncy287DOI Listing
March 2019
3 Reads

SEVENTEENTH INTERNATIONAL SYMPOSIUM ON MICRODOSIMETRY.

Radiat Prot Dosimetry 2019 Mar 11. Epub 2019 Mar 11.

Oxford Institute for Radiation Oncology, University of Oxford, Oxford, UK.

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http://dx.doi.org/10.1093/rpd/ncz030DOI Listing
March 2019
3 Reads

MAIN FINDINGS FROM RADON INDOOR SURVEY IN MONTENEGRO.

Radiat Prot Dosimetry 2019 Mar 6. Epub 2019 Mar 6.

Primary School 'Dr Dragisa Ivanovic', Pohorska bb, 81000 Podgorica, Montenegro.

Recent residential radon survey in Montenegro revealed the national average annual radon activity concentrations: unweighted AM = 110 Bq m-3, GM = 58.3 Bq m-3, and population weighted (AM)w = 100.5 Bq m-3, (GM)w = 92. Read More

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http://dx.doi.org/10.1093/rpd/ncz022DOI Listing
March 2019
1 Read

PATIENT DOSE SURVEY BASED ON SIZE-SPECIFIC DOSE ESTIMATE AND ACCEPTABLE QUALITY DOSE IN CHEST AND ABDOMEN/PELVIS CT EXAMINATIONS.

Radiat Prot Dosimetry 2019 Feb 28. Epub 2019 Feb 28.

Immunology of Infectious Diseases Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, Iran.

The practical aspects of two recently developed patient dose optimization methods in computed tomography (CT) examinations, size-specific dose estimate (SSDE) and acceptable quality dose (AQD), were verified for the chest and abdomen/pelvis examinations. A dose survey was performed in a CT institute by considering patients lateral diameter, weight and body mass index (BMI). The AQD tables for weight and BMI groups and SSDE threshold curves were obtained. Read More

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http://dx.doi.org/10.1093/rpd/ncy288DOI Listing
February 2019
4 Reads

RADON-222 ASSESSMENT AND ESTIMATION OF ANNUAL EFFECTIVE DOSE IN GROUNDWATER IN LAGOS STATE, NIGERIA.

Radiat Prot Dosimetry 2019 Feb 28. Epub 2019 Feb 28.

Department of Physics, University of Ibadan, Ibadan, Nigeria.

Radon-222 concentration in groundwater from Lagos State, Nigeria was measured. The arithmetic means of the radon concentration in the water ranged between 0.138 ± 0. Read More

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http://dx.doi.org/10.1093/rpd/ncz015DOI Listing
February 2019
2 Reads

PRELIMINARY STAFF DOSE ASSESSMENT FOR COMMON FLUOROSCOPY GUIDED PROCEDURES AT KORLE-BU TEACHING HOSPITAL, ACCRA, GHANA.

Radiat Prot Dosimetry 2019 Feb 28. Epub 2019 Feb 28.

School of Nuclear and Allied Sciences, University of Ghana, PO Box AE 1, Atomic, Accra, Ghana.

Preliminary studies on effective and eye lens doses of six Radiologists, four Cardiologists have been conducted for a period of 3 months. Electronic dosemeters positioned under and over lead apron of staff were used for the dosimetry. The estimated effective dose per month to Cardiologist and Radiologist were 0. Read More

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http://dx.doi.org/10.1093/rpd/ncz021DOI Listing
February 2019
3 Reads

PROPOSAL FOR A EUROPEAN METROLOGY NETWORK ON BIOLOGICAL IONISING RADIATION EFFECTS.

Radiat Prot Dosimetry 2019 Feb 27. Epub 2019 Feb 27.

Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany.

Progress in the field of ionising radiation (IR) metrology achieved in the BioQuaRT project raised the question to what extent radiobiological investigations would benefit from metrological support of the applied methodologies. A panel of experts from the medical field, fundamental research and radiation protection attended a workshop at Physikalisch-Technische Bundesanstalt to consult on metrology needs related to biological radiation effects. The panel identified a number of metrological needs including the further development of experimental and computational techniques for micro- and nanodosimetry, together with the determination of related fundamental material properties and the establishment of rigorous uncertainty budgets. Read More

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http://dx.doi.org/10.1093/rpd/ncz011DOI Listing
February 2019
3 Reads

COMPARISON OF RADIATION EXPOSURE TO THE PATIENT AND CONTRAST DETAIL RESOLUTIONS ACROSS LOW DOSE 2D/3D SLOT SCANNER AND TWO CONVENTIONAL DIGITAL RADIOGRAPHY X-RAY IMAGING SYSTEMS.

Radiat Prot Dosimetry 2019 Feb 27. Epub 2019 Feb 27.

Department of Radiology, Odense University Hospital, Odense C, Denmark.

Purpose: To assess and compare the radiation dose and image quality of the low dose 2D/3D EOS slot scanner (LDSS) to conventional digital radiography (DR) X-ray imaging systems for chest and knee examination protocols.

Methods And Materials: The effective doses (ED) to the patient in the chest and knee clinical examination protocols for LDSS and DR X-ray imaging systems were determined using the dose area product and PCXMC Monte Carlo simulation software. The CDRAD phantom was imaged with 19 cm, and 13 cm thick Polymethyl Methacrylate (PMMA) blocks to simulate the chest and knees respectively of a patient of average adult size. Read More

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http://dx.doi.org/10.1093/rpd/ncz006DOI Listing
February 2019
3 Reads
0.913 Impact Factor

ENERGY RESPONSE FACTOR of BeO DOSEMETER CHIPS: A MONTE CARLO SIMULATION AND GENERAL CAVITY THEORY STUDY.

Radiat Prot Dosimetry 2019 Feb 26. Epub 2019 Feb 26.

Department of Radiation and Cellular Oncology, University of Chicago Pritzker School of Medicine, Chicago, IL, USA.

The objective of this study is to determine the energy response factors for BeO optically simulated dosemeter (OSLD) using general cavity theory and Monte Carlo (MC) simulations. A virtual phantom is constructed in EGSnrc MC program and energy response of BeO OSLDs were simulated at 5 cm depth for x-ray beams ranging from 1.25 to 25 MV and at 2 cm for beams with <250 kV including ISO 4037 narrow beam energies in a virtual water phantom. Read More

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http://dx.doi.org/10.1093/rpd/ncz010DOI Listing
February 2019
3 Reads

AN ADVANCE IN EPR DOSIMETRY WITH NAILS.

Radiat Prot Dosimetry 2019 Feb 26. Epub 2019 Feb 26.

Radiation Dosimetry Laboratory, Department of Physics, Oklahoma State University, Stillwater, OK, USA.

Olive oil is proposed as a medium for storage of nails in the time between nail harvesting and electron paramagnetic resonance (EPR) measurements to minimise the decay of the radiation-induced EPR signals (RIS). The behaviours of three main EPR signals, namely, RIS, mechanically induced and the background signals (MIS and BG, respectively), were studied for storage in olive oil. The properties of the MIS and BG signals were very similar to those previously observed for the storage in a vacuum. Read More

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http://dx.doi.org/10.1093/rpd/ncz019DOI Listing
February 2019
4 Reads

MCNP SIMULATIONS WITH A PERSONALISED VOXEL PHANTOM TO VERIFY 131I CONTENT IN THYROID ESTIMATED BASED ON MEASUREMENTS WITH AN NaI(Tl) SPECTROMETER.

Radiat Prot Dosimetry 2019 Feb 26. Epub 2019 Feb 26.

Department of Radiation Measurement and Dose Assessment, National Institutes for Quantum and Radiological Sciences and Technology, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba-city, Chiba, Japan.

One of the authors (O.K.) stayed in the area located ~110 km south from the Fukushima Daiichi Nuclear Power Plant during the arrival of radioactive plumes released into the environment due to the accident in March 2011 in Japan. Read More

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http://dx.doi.org/10.1093/rpd/ncz020DOI Listing
February 2019
2 Reads

DETECTION OF IONIZING RADIATION TREATMENT IN GLASS USED FOR HEALTHCARE PRODUCTS.

Radiat Prot Dosimetry 2019 Feb 26. Epub 2019 Feb 26.

Core Facilities, Istituto Superiore di Sanità, Viale Regina Elena 299, Roma, Italy.

The treatment with high doses of ionizing radiation is prescribed for the terminal sterilization of many healthcare products. In order to check the product irradiation, it may be useful to develop suitable detection methods. The aim of this work was to verify the suitability of the thermoluminescence (TL) and electron paramagnetic resonance (EPR) techniques to reveal illegal omission of radiation sterilization in glass used for blood test tubes. Read More

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http://dx.doi.org/10.1093/rpd/ncz014DOI Listing
February 2019
5 Reads

THE PROJECT OF ANOTHER LOW-COST METAPHASE FINDER (SECOND REPORT-APPLICATION OF ARTIFICIAL INTELLIGENCE).

Authors:
Akira Furukawa

Radiat Prot Dosimetry 2019 Feb 26. Epub 2019 Feb 26.

National Institutes for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba, Japan.

Biological dosimetry is used to estimate individual absorbed radiation dose by quantifying an appropriate biological marker. The most popular gold-standard marker is the appearance of dicentric chromosomes in metaphase. The metaphase finder is a tool for biological dosimetry that finds metaphase cells on glass slides. Read More

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http://dx.doi.org/10.1093/rpd/ncz012DOI Listing
February 2019
4 Reads

TERRESTRIAL RADIONUCLIDES IN SURFACE (DAM) WATER AND CONCOMITANT DOSE IN METROPOLITAN KUALA LUMPUR.

Radiat Prot Dosimetry 2019 Feb 26. Epub 2019 Feb 26.

Centre for Biomedical Physics, School of Healthcare and Medical Sciences, Sunway University, 47500 Bandar Sunway, Selangor Darul Ehsan, Malaysia.

Batu Dam is of considerable importance to the metropolis of Kuala Lumpur, its existence and the quality assessment of its waters being essential in helping to maintain the lives of a large sector of the Malaysian population. Concerning the level of naturally occurring radioactivity contained within its waters, a well characterised HPGe γ-ray technique has been used in making measurements of the concentrations of primordial radionuclides in samples of surface water from the Dam. Based on the mean individual daily consumption of dam water, estimation has been made of the concomitant radiation dose. Read More

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http://dx.doi.org/10.1093/rpd/ncz018DOI Listing
February 2019
5 Reads

MODELLING THE INDOOR RADIATION DOSES: A REVIEW AND PERSPECTIVE.

Authors:
Momen Orabi

Radiat Prot Dosimetry 2019 Feb 26. Epub 2019 Feb 26.

Physics Department, Faculty of Science, Cairo University, Giza, Egypt.

Theoretical models to calculate the indoor gamma and radon doses are reviewed, refined and applied. The model for gamma doses is built based on the relative effects of the different room elements that control the amount of radiation. The relative doses are calculated by the MCNP5 simulation software. Read More

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http://dx.doi.org/10.1093/rpd/ncz008DOI Listing
February 2019
1 Read

A RADIATION DOSIM alRY ASSESSMENT OF WORKERS IN GREEK STYLE ROTISSERIES THAT USE PELLETS CONTAMINATED BY 137Cs AND 90Sr.

Radiat Prot Dosimetry 2019 Feb 26. Epub 2019 Feb 26.

Greek Atomic Energy Commission, Patriarchou Grigoriou & Neapoleos, P.O BOX 60092, P.C. 15341, Agia Paraskevi, Athens, Greece.

This work evaluates the 137Cs and 90Sr content of wood pellets of the Greek energy market and additionally calculates worker exposure in Greek catering establishments (rotisseries). Wood pellets and ash samples were analysed through high resolution gamma-ray spectroscopy and liquid scintillation. Imported pellets had higher 137Cs concentrations, especially pellets that were imported in bulk. Read More

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http://dx.doi.org/10.1093/rpd/ncz017DOI Listing
February 2019
2 Reads

ASSESSMENT OF MOVEMENT-INDUCED TIME-VARYING MAGNETIC FIELDS EXPOSURE IN MAGNETIC RESONANCE IMAGING BY A COMMERCIAL PORTABLE MAGNETOMETER.

Radiat Prot Dosimetry 2019 Feb 26. Epub 2019 Feb 26.

Neuroradiology Unit, Azienda Ospedaliero-Universitaria of Parma, Parma, Italy.

The purpose of this study was to describe a simple procedure to assess head exposure of MRI workers to time-varying magnetic field, due to their movements in the static magnetic field of a 3T MRI scanner. A group of MRI workers were provided with a commercial portable meter that stored in its internal memory the instantaneous B values. The dB/dt was obtained by the post hoc processing of measured data. Read More

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http://dx.doi.org/10.1093/rpd/ncz016DOI Listing
February 2019
4 Reads

INITIAL TL/OSL/EPR CONSIDERATIONS FOR COMMERCIAL DIATOMACEOUS EARTH IN RETROSPECTIVE DOSIMETRY AND DATING.

Radiat Prot Dosimetry 2019 Feb 26. Epub 2019 Feb 26.

Oak Ridge National Laboratory, Nuclear Security Modeling Group, 1 Bethel Valley Road, Oak Ridge, TN, USA.

Diatomaceous earth is found in various locations around the planet. It is caused by the deposited exoskeleton material formed by the death of large concentrated populations of diatoms. The exoskeleton is effectively pure silicate and as such becomes a prospective material for retrospective dosimetry and dating. Read More

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http://dx.doi.org/10.1093/rpd/ncz013DOI Listing
February 2019
3 Reads

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
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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
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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
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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
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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
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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
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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
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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
2 Reads
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
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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
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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
2 Reads
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
17 Reads