نتایج جستجو برای: دزیمتر thermoluminescence dosimeter

تعداد نتایج: 3142  

Journal: :journal of biomedical physics and engineering 0
s. m. j. mortazavi professor of medical physics, department of medical physics and medical engineering, school of medicine, shiraz university of medical sciences, shiraz, iran n. omidifar pathology resident, pathology department, school of medicine, shiraz university of medical sciences, shiraz, iran r. faghihi nuclear engineering department, school of mechanical engineering, shiraz university, shiraz, iran s. mehdizadeh nuclear engineering department, school of mechanical engineering, shiraz university, shiraz, iran s. masoumi the center for radiological research, shiraz university of medical sciences, shiraz, iran s. m. hashemi the center for radiological research, shiraz university of medical sciences, shiraz, iran

background: the number of interventional cardiology procedures performed has increased rapidly over the past years. while these procedures help physicians avoid using highly complicated invasive methods, it usually leads to high levels of exposure to ionizing radiation of both patients and cardiologist. the dose received by the cardiologist during interventional cardiology procedures is determi...

Journal: :Chest 2005
Nathan D Allen Beth E Davis Thomas S Hurst Donald W Cockcroft

BACKGROUND Two bronchoprovocation methods are widely used. Compared to the tidal breathing method, the dosimeter method delivers approximately half the dose and involves five deep inhalations. Both the lower dose and the bronchoprotective deep inhalations contribute to the lesser airway response of the dosimeter. OBJECTIVE To determine the relative role of dose and deep inspiration in the dif...

2016
M. Böhm R. Grasser A. Hofstaetter A. Scharmann M. Bohm

— In tungstate and molybdate crystals having scheelite structure various (intrinsic and extrinsic) hole and electron centres are created by X-irradiation at liquid nitrogen temperature. Several of these centres have been thoroughly investigated by electron paramagnetic resonance (EPR) measurements. Their thermal decay and optical bleaching, resp., can be related to glow peaks of thermoluminesce...

2004
K. Koike H. Chihara C. Koike M. Nakagawa M. Okada M. Matsumura J. Takada

the date of receipt and acceptance should be inserted later Abstract. Possible forsterite nanoparticle model of the Extended Red Emission(ERE) is proposed on the basis of photo-luminescence of forsterite after gamma-ray and neutron irradiation. Forsterite exhibits interesting thermoluminescence spectrum similar to ERE of Red Rectangle after irradiation in low temperature. It is shown that the f...

Journal: :Physics in medicine and biology 2015
Y De Deene P S Skyt R Hil J T Booth

Three dimensional radiation dosimetry has received growing interest with the implementation of highly conformal radiotherapy treatments. The radiotherapy community faces new challenges with the commissioning of image guided and image gated radiotherapy treatments (IGRT) and deformable image registration software.A new three dimensional anthropomorphically shaped flexible dosimeter, further call...

2017
H. Amer

In radiation accidents, especially those occuring in residential regions, where the general public may receive a significant dose, it will be very advantageous to define a material that could be easily found in accident location to be used as a radiation dosimeter. One of such materials is the household NaCl that always exist everywhere and could be easily collected. For that reason, the Thermo...

Journal: :Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine 2001
T T Cheung K N Yu D Nikezic

A true bronchial dosimeter has been designed, consisting of four 400-mesh wire screens and a filter paper. With a face velocity of 3.3 cm s(-1) for home exposure and 4.6 cm s(-1) for mine exposure, the deposition pattern on the wire screens were found to satisfactorily match the variation of the dose conversion factor (in units of mSv WL M(-1)) with the size of radon progeny from 1 to 1000 nm. ...

2010
Susana Lopez-Aparicio Terje Grøntoft Elin Dahlin

96 Since its development, the Early Warning dosimeter for Organic materials (EWO dosimeter) has been used as both a research and general measurement tool for the evaluation of indoor air quality for preservation of cultural heritage artefacts. The EWO dosimeter measures the integrated degradation impact of the environment, comparable to that observed on organic materials due to the synergistic ...

2015
Lata Wanjari D. P. Bisen Raunak Kumar Tamrakar

Pure and copper doped ZnS nanoparticles in powder form were prepared by wet chemical route method by using thioglycerol as a capping agent. The XRD studies indicate that the samples are cubic in nature. The thermoluminescence (TL) behavior of pure and copper doped ZnS has been studied for fixed 10 min UV exposure time; TL glow curve shows a single peak at 165.1°C and 184.3°C temperature respect...

2014
Marc F. Desrosiers

Post-irradiation stability of high-dose dosimeters has traditionally been an important measurement influence quantity. Though the exceptional stability of the alanine dosimeter response with time has rendered this factor a non-issue for routine work, the archival quality of the alanine dosimeter has not been characterized. Here the alanine pellet dosimeter response is measured up to seven years...

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