Comparison of different methods for shielding design in computed tomography.

abstract：:In response to reactive oxygen species (ROS) or electrophiles, the transcription factor nuclear factor-erythroid 2 (NF-E2)-related factor 2 (Nrf2) rapidly translocates into the nucleus and induces the expression of various antioxidant genes, such as heme oxygenase-1 (HO-1). Low linear energy transfer (LET) ionising ra...

journal_title：Radiation protection dosimetry

authors： Yoshino H,Kiminarita T,Matsushita Y,Kashiwakura I

更新日期：2012-11-01 00:00:00

abstract：:In this paper, the results aimed at assessing the performance of two varieties of LiF detectors (LiF:Mg,Ti and LiF:Mg,Cu,P) in photon fields relatively to reproducibility, detection threshold and angular dependence as defined in the ISO 12794 standard are presented. The fading properties and the limit of detection wer...

journal_title：Radiation protection dosimetry

authors： Freire LC,Pereira MF,Calado AM,Santos LM,Cardoso JV,Alves JG

更新日期：2011-03-01 00:00:00

abstract：:Continuous observation of radioactivity ratio of (214)Bi to (214)Pb as tracers in rainwater was carried out with 15-min cyclic measurement at Nagoya, Japan, from August 2011 to July 2012 to characterise wet deposition. The ratio ranged from 0.55 to 3.82. Based on the observation and a simplified time evolution model o...

journal_title：Radiation protection dosimetry

authors： Moriizumi J,Kondo D,Kojima Y,Liu H,Hirao S,Yamazawa H

更新日期：2015-11-01 00:00:00

abstract：:Doses in radiology should be as low as reasonably achievable. In order to compare practice in different centres it is necessary to compare patient doses. This can only be undertaken if dosimetry studies are similar. In order to facilitate comparisons, the DIMOND consortium developed a patient dosimetry protocol. Refer...

journal_title：Radiation protection dosimetry

authors： Faulkner K

更新日期：2005-01-01 00:00:00

abstract：:Expansion of accelerator technologies into different application areas brings the need for neutron-field measurements in their vicinity. The measurements of neutron energy spectra and neutron dose rates can be done with the aid of neutron multisphere spectrometers with passive neutron detectors. In addition to the usu...

journal_title：Radiation protection dosimetry

authors： Vlk P,Pavlovic M

更新日期：2018-04-01 00:00:00

abstract：:In Austria a comprehensive study on radiation exposure in waterworks was conducted. The aim of this study was to evaluate the risks for the affected employees. On the basis of geographical, geological and hydrological aspects, 21 waterworks were selected. A total of 85 passive short-term measurements and measurements ...

journal_title：Radiation protection dosimetry

authors： Michael S,Andreas B,Claudia S,Fabian R,Ringer W,Josef MF

更新日期：2014-07-01 00:00:00

abstract：:The objective of this work is to obtain fluence to effective dose conversion coefficients for neutron point sources, using the GEANT4 toolkit. These calculations aim to investigate the aspects of neutron transport in the human body through Monte Carlo simulation using the International Commission on Radiological Prote...

journal_title：Radiation protection dosimetry

authors： Ribeiro RM,Souza-Santos D

更新日期：2018-08-01 00:00:00

abstract：:Daily rhythmic changes are found in cellular events in cell cycle, DNA repair, apoptosis and angiogenesis in both normal and tumour tissue, as well as in enzymatic activity and drug metabolism. In this paper, we hypothesize that circadian rhythms need to be considered in radiation protection and optimization in person...

journal_title：Radiation protection dosimetry

authors： Forssell-Aronsson E,Quinlan RA

更新日期：2017-04-01 00:00:00

abstract：:Neutron therapy beams are obtained by accelerating protons or deuterons on Beryllium. These neutron therapy beams present comparable dosimetric characteristics as those for photon beams obtained with linear accelerators; for instance, the penetration of a p(65)+Be neutron beam is comparable with the penetration of an ...

journal_title：Radiation protection dosimetry

authors： Vynckier S,International Atomic Energy Agency.,International Commission on Radiation Units and Measurements.

更新日期：2004-01-01 00:00:00

abstract：:In France, natural sources account for most of the population exposure to ionising radiation. This exposure varies widely with area. Radon and gamma-ray exposure data come from national measurement campaigns; cosmic doses were calculated from city altitude. These data were corrected for season of measurement, housing ...

journal_title：Radiation protection dosimetry

authors： Billon S,Morin A,Caër S,Baysson H,Gambard JP,Backe JC,Rannou A,Tirmarche M,Laurier D

更新日期：2005-01-01 00:00:00

abstract：:The starting point of the Spanish experience in the study of High Background Radiation Areas is the development of a nationwide indoor radon survey carried out in 1988. This campaign, belonging to the first Spanish Radon Framework, consisted of approximately 2000 indoor radon measurements which represented a valuable ...

journal_title：Radiation protection dosimetry

authors： Sáinz C,Quindós LS,Fernández PL,Gómez J,Fuente I,Quindós L,Matarranz JL

更新日期：2007-01-01 00:00:00

abstract：:Entrance surface doses (ESDs) were measured for the most common types of X ray procedures, such as chest PA, lumber spine AP, lumber spine lateral, skull AP, skull lateral and pelvis AP in four major hospitals of Dhaka, the capital city of Bangladesh. Organ/tissue doses for 29 organs/tissues and effective doses for th...

journal_title：Radiation protection dosimetry

authors： Begum Z

更新日期：2001-01-01 00:00:00

abstract：:Although numerous models have been developed for occupational and medical internal dosimetry, they may not be applicable to an accident situation. Published dose coefficients relate effective dose to intake, but if acute deterministic effects are possible, effective dose is not a useful parameter. Consequently, dose r...

journal_title：Radiation protection dosimetry

authors： Toohey RE

更新日期：2003-01-01 00:00:00

abstract：:The measurement of indoor radon concentrations were performed in the dwellings of the Punjab and Himachal Pradesh, India by using LR-115 type II Solid-State Nuclear Track Detectors in the bare mode. The annual average indoor radon concentrations in the dwellings are found to vary from 114 to 400 Bq m(-3) with an avera...

journal_title：Radiation protection dosimetry

authors： Rani A,Singh S,Duggal V

更新日期：2013-01-01 00:00:00

abstract：:It has been reported recently that the A-bomb gamma ray spectra received by the colon of the average Japanese survivor of Hiroshima and Nagasaki may be experimentally simulated using a hospital-based Philips SL15 linear accelerator. The simulated A-bomb gamma radiation may be used in radiobiology experiments to determ...

journal_title：Radiation protection dosimetry

authors： Pattison JE,Payne LC,Hugtenburg RP,Beddoe AH,Charles MW

更新日期：2004-01-01 00:00:00

abstract：:Thoron progeny concentrations were determined using the time-integrated method around closed uranium mine sites in Japan. Because the time-integrated radon progeny monitor developed by the authors has the function to detect (212)Po, time-integrated monitoring of thoron progeny concentration is also available with the ...

journal_title：Radiation protection dosimetry

authors： Ishimori Y

更新日期：2010-10-01 00:00:00

abstract：:At a high-energy, high-intensity proton accelerator facility, the accelerator components inside the beam-line tunnel and the concrete wall of the tunnel are activated due to beam loss during operation. During maintenance work inside the tunnel, radiation emitted from these activated materials can cause exposure to rad...

journal_title：Radiation protection dosimetry

authors： Numajiri M

更新日期：2007-01-01 00:00:00

abstract：:In March 2011, the Fukushima Daiichi Nuclear Power Plant Accident occurred and a large amount of radionuclides was released. To study its effect, we estimated the internal exposure due to intake of tap water in the early phase after the accident. As the number of measured values of tap water following the accident was...

journal_title：Radiation protection dosimetry

authors： Kawai M,Yoshizawa N,Suzuki G

更新日期：2018-04-01 00:00:00

abstract：:An extensive studies on the indoor activity concentrations of thoron, radon and their progeny in the granite region in the state of Karnataka, India, has been carried out since, 2007 in the scope of a lung cancer epidemiological study using solid-state nuclear track detector-based double-chamber dosemeters (LR-115, ty...

journal_title：Radiation protection dosimetry

authors： Sannappa J,Ningappa C

更新日期：2014-03-01 00:00:00

abstract：:For more accurate assessments of the occupational exposure to radon for miners, the individual monitoring was conducted by using an improved passive integrating (222)Rn monitor. A total of 120 miners in 3 different kinds of mines were monitored throughout a year. The results showed that the individual exposure to rado...

journal_title：Radiation protection dosimetry

authors： Fan D,Zhuo W,Zhang Y

更新日期：2016-09-01 00:00:00

abstract：:According to the worldwide reports, industrial radiography is one of the highest risk radiation practices due to handling high activity sources. Therefore, an optimization of protection along with appropriate investigation level and/or dose constraint is required to achieve appropriate radiological safety. This resear...

journal_title：Radiation protection dosimetry

authors： Hosseini Pooya SM,Dashtipour MR

更新日期：2018-10-01 00:00:00

abstract：:With the widespread introduction of extra high voltage power transmission lines in the 1960s, and subsequent to early reports from Soviet Union scientists about health risks for transformer station personnel, public concern regarding the effects of electromagnetic fields (EMFs) on biological function has given rise to...

journal_title：Radiation protection dosimetry

authors： Cooper PJ,Garny A,Kohl P

更新日期：2003-01-01 00:00:00

abstract：:In Malaysia technologically enhanced naturally occurring radioactive materials (TENORM) wastes are mainly the product of the oil and gas industry and mineral processing. Among these TENORM wastes are tin tailing, tin slag, gypsum and oil sludge. Mineral processing and oil and gas industries produce large volume of TEN...

journal_title：Radiation protection dosimetry

authors： Ismail B,Teng IL,Muhammad Samudi Y

更新日期：2011-11-01 00:00:00

abstract：:The effect of an automatic wedge filter on photon and photoneutron spectra of a medical linac was evaluated using the Monte Carlo method. The head of an Elekta SL75/25 was simulated using the MCNPX Monte Carlo code. The photon and photoneutron spectra for open and wedged beams were calculated at the isocentre with a s...

journal_title：Radiation protection dosimetry

authors： Ghavami SM,Mesbahi A,Mohammadi E

更新日期：2010-02-01 00:00:00

abstract：:The first commercial spent nuclear fuel reprocessing plant at Rokkasho in Japan discharged 129I from actual spent nuclear fuel into the atmosphere during its test operation from 2006 to 2008. Previously, we measured monthly atmospheric concentrations of gaseous and particulate 129I and atmospheric deposition rates of ...

journal_title：Radiation protection dosimetry

authors： Abe K,Hasegawa H,Akata N,Kakiuchi H,Chiang JH,Suwa H,Hisamatsu S

更新日期：2019-10-01 00:00:00

abstract：:The purpose of this study was to investigate other indices estimating absorbed dose for eye lens and brain, using clinical images of East Asian pediatric patients. We simulated head computed tomography (CT ) examinations in 104 pediatric patients. Effective diameter (deff) and water equivalent diameter (dw) were measu...

journal_title：Radiation protection dosimetry

authors： Kawamoto K,Fukushima Y,Matsuda A,Nakata M

更新日期：2020-12-17 00:00:00

abstract：:New imaging technologies utilising X rays and radiopharmaceuticals are continuously under development. The benefit of computed tomography (CT) has been so dramatic that there is a tendency to overuse it and not to place enough efforts into optimisation of the technique. It is also now more and more common to combine t...

journal_title：Radiation protection dosimetry

authors： Mattsson S,Söderberg M

更新日期：2011-09-01 00:00:00

abstract：:Radon gas concentrations in eight basements, four living rooms and four caves from different locations in Kabul and Panjsher, Afghanistan, were measured by using eight active radon exposure meters recently developed by the Helmholtz Center in Munich, Germany. The two-phase measurements lasted from a week to a year. In...

journal_title：Radiation protection dosimetry

authors： Tanha MR,Vahlbruch JW,Riebe B,Irlinger J,Rühm W,Khalid FR,Storai A,Walther C

更新日期：2018-01-01 00:00:00

abstract：:Representative environmental samples (sandy soil, limestone, marble and gravels) collected from Wadi El Assuity, protective area, Assuit governorate in Upper Egypt have been investigated radiometrically using NaI (Tl) gamma-ray spectrometer. The specific activity of the radionuclides in Bq kg⁻¹ for soil ranged between...

journal_title：Radiation protection dosimetry

authors： El-Taher A

更新日期：2011-06-01 00:00:00

abstract：:Decommissioning of nuclear building structures usually leads to large amounts of low-level radioactive waste. Using a reliable method to determine the contamination depth, it is indispensable prior to the start of decontamination works and for minimising the radioactive waste volume and the total workload. This paper ...

journal_title：Radiation protection dosimetry

authors： Dolniak J,Lištjak M,Slaninka A,Nečas V

更新日期：2019-12-31 00:00:00