Relevant bibliographies by topics / Dosimetry applications

Academic literature on the topic 'Dosimetry applications'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Dosimetry applications"

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Bhatt, B. C., and M. S. Kulkarni. "Thermoluminescent Phosphors for Radiation Dosimetry." Defect and Diffusion Forum 347 (December 2013): 179–227. http://dx.doi.org/10.4028/www.scientific.net/ddf.347.179.

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The use of thermoluminescence (TL) as a method for radiation dosimetry of ionizing radiation has been established for many decades and has found many useful applications in various fields, such as personnel and environmental monitoring, retrospective dosimetry, medical dosimetry, space dosimetry, high-dose dosimetry. Method of preparation, studies and applications of thermoluminescence (TL) dosimetric materials are reviewed. Several high sensitivity thermoluminescent dosimeters (TLDs) are now commercially available in different physical forms. These commercial TL dosimeters comply with a set of stringent requirements stipulated by the International Electrotechnical Commission (IEC). Specific features of TL phosphors for thermal neutron, fast neutron and high-energy charged particle (HCP) dosimetry are also considered. Some of the recent developments in the field of optically stimulated luminescence (OSL) and radiophotoluminescence (RPL) are also summarized. Comparative advantages of TL, OSL and RPL dosimeters are given. Results of recent studies of TL in nanosized materials are briefly presented. Future challenges in this field will also be discussed. Contents of Paper
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Gafar, Sameh Mohamed, and Nehad Magdy Abdel-Kader. "Radiation induced degradation of murexide dye in two media for possible use in dosimetric applications." Pigment & Resin Technology 48, no. 6 (November 4, 2019): 540–46. http://dx.doi.org/10.1108/prt-02-2019-0014.

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Purpose The purpose of this paper is to study the effect of gamma-rays on murexide (Mx) dye and its possible use as radiation dosimeters in two different dosimetry systems. The first system depends on the Mx dye as a liquid dosimeter. The second dosimetry system depends also on the same dye but as in a gel form, which is more sensitive to gamma-rays. Design/methodology/approach The prepared Mx (solutions/gels) have a considerable two peaks at 324 and 521 nm that upon irradiation, the intensity of these peaks decreases with the increasing radiation dose. Findings The gamma-ray absorbed dose for these dosimeters was found to be up to 2 kGy for the solution samples and 40 Gy for the gels. Radiation chemical yield, dose response function, radiation sensitivity and before and after-irradiation stability under various conditions were discussed and studied. Practical implications It is expected that the radiolysis of the Mx dye can be used as radiation dosimeters in two different dosimetry systems; liquid and gel dosimeters. This can be applied in a wide range of gamma radiation practical industrial applications in water treatment, food irradiation dosimeters, radiotherapy and fresh food irradiation and seed production. Originality/value Both of the prepared Mx dyes, either as solutions or gel samples, can be facilely prepared from commercially, cheap, safe, available chemicals and suitable for useful applied Mx solutions and gels radiation dosimeters.
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Prestopino, Giuseppe, Enrico Santoni, Claudio Verona, and Gianluca Verona Rinati. "Diamond Based Schottky Photodiode for Radiation Therapy In Vivo Dosimetry." Materials Science Forum 879 (November 2016): 95–100. http://dx.doi.org/10.4028/www.scientific.net/msf.879.95.

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Diamond has long been considered as a suitable material for the fabrication of radiation detectors due to its outstanding physical properties. Even more so in the specific case of radiation therapy dosimetry applications, where the near-tissue equivalence radiation absorption, good spatial resolution and radiation hardness are required. Recently, a synthetic single crystal diamond dosimeter was developed at “Tor Vergata” University in cooperation with PTW-Freiburg, showing excellent dosimetric properties. Such a device was thus commercialized (microDiamondTM, PTW-type 60019) and widely accepted by the medical physics community, due to its reproducibility, reliability, accuracy and versatility. In this work, a novel diamond based dosimeter for in vivo application developed in our laboratories is presented. A basic dosimetric characterization of detector performances was performed under irradiation with 60Co and 6 MV photon beams. Response stability, short and long term reproducibility, fading effect, linearity with dose, dose rate dependence, and temperature dependence were investigated. The detector response was found to be reproducible and dose rate independent in the range between 0.5 and 5 Gy/min. Its temperature dependence was within 0.5% between 25 and 38 ◦C, and negligible fading effect was observed. The obtained results indicate the proposed novel diamond device as a promising candidate for in vivo dosimetry in radiation therapy application.
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Murthy, K. V. R. "Applications of TLDs in Radiation Dosimetry." Defect and Diffusion Forum 341 (July 2013): 211–30. http://dx.doi.org/10.4028/www.scientific.net/ddf.341.211.

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An increasing amount of public interest in environmental monitoring programmes is being focused on the environmental impact of radiation arising from nuclear power operations and the corresponding detection of slight variations in the natural radiation background. The primary objective of individual monitoring for external radiation is to assess, and thus limit, radiation doses to individual workers. Supplementary objectives are to provide information about the trends of these doses and about the conditions in places of work and to give information in the event of accidental exposure. Depending on the kind of radiation hazard, the ICRP recommended maximum permissible dose (MPD) values. These are the maximum dose equivalent values, which are not expected to cause appreciable body injury to a person during his lifetime. Thermoluminescent Dosimetry (TLD) has been developed during 1960-70 for various applications in medicine and industry. TLD, the most advanced and most intensively studied integrating dosimeter system, has now reached the stage at which it may replace or supplement film dosimetry. TLD systems are widely applied to environmental monitoring programmes near nuclear installations. TLD systems with high reproducibility in the milli roentgen dose range are required in order to measure exposures equal to that resulting from an exposure rate of 10μR h-1 during field periods of from several days up to a year. A brief list of applications specific to radiation oncology is given here. In radiation oncology dosimetric accuracy demanded is of the order of 2-5%. TLDs offer a clear solution since their precision meets this criteria. Contents
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Murthy, K. V. R. "Thermoluminescence and its Applications: A Review." Defect and Diffusion Forum 347 (December 2013): 35–73. http://dx.doi.org/10.4028/www.scientific.net/ddf.347.35.

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The present review article contains various applications of Thermoluminescence. The phenomena of thermoluminescence (TL) or thermally stimulated luminescence (TSL) and optically stimulated luminescence (OSL) are widely used for measurement of radiation doses from ionizing radiations, viz. x-rays, γ rays and β particles. The applications of TL are initiated in the field of Geology followed by Archaeology, personal dosimetry, material characterization and many more to name. The TL technique has been found to be useful in dating specimens of geologically recent origin where all other conventional methods fail. It has been found to be highly successful in dating ancient pottery samples. The TL/OSL dating is done from a quartz grain, which is collected from pottery or brick, by reading the TL-output. The main basis in the Thermoluminescence Dosimetry (TLD) is that TL output is directly proportional to the radiation dose received by the phosphor and hence provides the means of estimating the dose from unknown irradiations. The TL dosimeters are being used in personnel, environmental and medical dosimetry. During the last two decades, OSL based dosimeters have also been used for various applications. Natural and induced TL signals can be used to explore mineral, oil and natural gas. The present review presents TL theory, TL of minerals, salt, cement, salt crystals from pickles, and low temperature thermoluminescence (LLTL) of few agricultural products. Contents of Paper
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Dhakal, Rabin, Mohammad Yosofvand, and Hanna Moussa. "Development and Application of MAGIC-f Gel in Cancer Research and Medical Imaging." Applied Sciences 11, no. 17 (August 24, 2021): 7783. http://dx.doi.org/10.3390/app11177783.

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Much of the complex medical physics work requires radiation dose delivery, which requires dosimeters to accurately measure complex three-dimensional dose distribution with good spatial resolution. MAGIC-f polymer gel is one of the emerging new dosimeters widely used in medical physics research. The purpose of this study was to present an overview of polymer gel dosimetry, using MAGIC-f gel, including its composition, manufacture, imaging, calibration, and application to medical physics research. In this review, the history of polymer gel development is presented, along with the applications so far. Moreover, the most important experiments/applications of MAGIC-f polymer gel are discussed to illustrate the behavior of gel on different conditions of irradiation, imaging, and manufacturing techniques. Finally, various future works are suggested based on the past and present works on MAGIC-f gel and polymer gel in general, with the hope that these bits of knowledge can provide important clues for future research on MAGIC-f gel as a dosimeter.
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Mohyedin, Muhammad Zamir, Hafiz Mohd Zin, Mohd Zulfadli Adenan, and Ahmad Taufek Abdul Rahman. "A Review of PRESAGE Radiochromic Polymer and the Compositions for Application in Radiotherapy Dosimetry." Polymers 14, no. 14 (July 16, 2022): 2887. http://dx.doi.org/10.3390/polym14142887.

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Recent advances in radiotherapy technology and techniques have allowed a highly conformal radiation to be delivered to the tumour target inside the body for cancer treatment. A three-dimensional (3D) dosimetry system is required to verify the accuracy of the complex treatment delivery. A 3D dosimeter based on the radiochromic response of a polymer towards ionising radiation has been introduced as the PRESAGE dosimeter. The polyurethane dosimeter matrix is combined with a leuco-dye and a free radical initiator, whose colour changes in proportion to the radiation dose. In the previous decade, PRESAGE gained improvement and enhancement as a 3D dosimeter. Notably, PRESAGE overcomes the limitations of its predecessors, the Fricke gel and the polymer gel dosimeters, which are challenging to fabricate and read out, sensitive to oxygen, and sensitive to diffusion. This article aims to review the characteristics of the radiochromic dosimeter and its clinical applications. The formulation of PRESAGE shows a delicate balance between the number of radical initiators, metal compounds, and catalysts to achieve stability, optimal sensitivity, and water equivalency. The applications of PRESAGE in advanced radiotherapy treatment verifications are also discussed.
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Algain, Ibrahim, Mehenna Arib, Said A. Farha Al-Said, and Hossam Donya. "Dosimetric Study of Heat-Treated Calcium–Aluminum–Silicon Borate Dosimeter for Diagnostic Radiology Applications." Sensors 23, no. 2 (January 16, 2023): 1011. http://dx.doi.org/10.3390/s23021011.

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The production of thermoluminescence (TL) dosimeters fabricated from B2O3-CaF2-Al2O3-SiO2 doped with Cu and Pr for use in diagnostic radiology is the main goal of this research. The TL samples were synthesized via the melt-quench technique processed by melting the mixture at 1200 °C for 1 h, and, after cooling, the sample thus created was divided into two samples and retreated by heating for 2 h (referred to as TLV30) and for 15 h (referred to as TLV17). SEM and EDS analyses were performed on the TL samples to confirm the preparation process and to investigate the effects of irradiation dosimetry on the TL samples. Furthermore, the TL samples were irradiated with γ-rays using a 450 Ci 137Cs irradiator and variable X-ray beams (5–70 mGy). Two important diagnostic radiology applications were considered: CT (6–24 mGy) and mammography (2.72–10.8 mGy). Important dosimetric properties, such as the glow curves, reproducibility, dose–response linearity, energy dependence, minimum dose detectability and fading, were investigated for the synthetized samples (TLV17 and TLV30), the results of which were compared with the Harshaw TLD-100. The TLV17 dosimeter showed higher sensitivity than TLV30 in all applied irradiation procedures. The dose–response linearity coefficients of determination R2 for TLV17 were higher than TLD-100 and TLV30 in some applications and were almost equal in others. The reproducibility results of TLV17, TLV30 and TLD-100 were less than 5%, which is acceptable. On the other hand, the results of the fading investigations showed that, in general, TLV17 showed less fading than TLV30. Both samples showed a significant decrease in this regard after the first day, and then the signal variation became essentially stable though with a slight decrease until the eighth day. Therefore, it is recommended to read the TL dosimeters after 24 h, as with TLD-100. The SEM images confirmed the existence of crystallization, whilst the EDS spectra confirmed the presence of the elements used for preparation. Furthermore, we noticed that TLV17 had grown dense crystals that were larger in size compared to those of TLV30, which explains the higher sensitivity in TLV17. Overall, despite the fading, TLV17 showed greater radiation sensitivity and dose–response linearity compared with TLD-100. The synthetized TL samples showed their suitability for use as dosimeters in diagnostic radiology radiation dosimetry.
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Gasiorowski, Andrzej, Piotr Szajerski, and Jose Francisco Benavente Cuevas. "Use of Terbium Doped Phosphate Glasses for High Dose Radiation Dosimetry—Thermoluminescence Characteristics, Dose Response and Optimization of Readout Method." Applied Sciences 11, no. 16 (August 5, 2021): 7221. http://dx.doi.org/10.3390/app11167221.

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The phosphate glass samples doped with Tb2O3 oxide (general formula: P2O5-Al2O3-Na2O-Tb2O3) were synthesized and studied for usage in high-dose radiation dosimetry (for example, in high-activity nuclear waste disposals). The influence of terbium concentration on thermoluminescent (TL) signals was analyzed. TL properties of glasses were investigated using various experimental techniques such as direct measurements of TL response vs. radiation dose, Tmax–Tstop and VHR (various heating rate) methods, and glow curve deconvolution analysis. The thermoluminescence dosimetry (TLD) technique was used as the main investigation tool to study detectors’ dose responses. It has been proved that increasing the concentration of terbium oxide in glass matrices significantly increases the thermoluminescence yield of examined material. For the highest dose range (up to 35 kGy), the dependence of the integrated thermoluminescent signals vs. dose can be considered as a saturation-type curve. Additional preheating of samples improves linearity of signal vs. dose dependencies and leads to a decrease of the signal loss over time. All obtained data suggest that investigated material can be used in high-dose radiation dosimetry. Additional advantages of the investigated dosimetric system are its potential ability to re-use the same dosimeters multiple times and the fact that reading dosimeters only requires usage of a basic TL reader without any modifications.
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Sholom, Sergey, Stephen W. S. McKeever, Maria B. Escalona, Terri L. Ryan, and Adayabalam S. Balajee. "A comparative validation of biodosimetry and physical dosimetry techniques for possible triage applications in emergency dosimetry." Journal of Radiological Protection 42, no. 2 (March 22, 2022): 021515. http://dx.doi.org/10.1088/1361-6498/ac5815.

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Abstract Large-scale radiological accidents or nuclear terrorist incidents involving radiological or nuclear materials can potentially expose thousands, or hundreds of thousands, of people to unknown radiation doses, requiring prompt dose reconstruction for appropriate triage. Two types of dosimetry methods namely, biodosimetry and physical dosimetry are currently utilized for estimating absorbed radiation dose in humans. Both methods have been tested separately in several inter-laboratory comparison exercises, but a direct comparison of physical dosimetry with biological dosimetry has not been performed to evaluate their dose prediction accuracies. The current work describes the results of the direct comparison of absorbed doses estimated by physical (smartphone components) and biodosimetry (dicentric chromosome assay (DCA) performed in human peripheral blood lymphocytes) methods. For comparison, human peripheral blood samples (biodosimetry) and different components of smartphones, namely surface mount resistors (SMRs), inductors and protective glasses (physical dosimetry) were exposed to different doses of photons (0–4.4 Gy; values refer to dose to blood after correction) and the absorbed radiation doses were reconstructed by biodosimetry (DCA) and physical dosimetry (optically stimulated luminescence (OSL)) methods. Additionally, LiF:Mg,Ti (TLD-100) chips and Al2O3:C (Luxel) films were used as reference TL and OSL dosimeters, respectively. The best coincidence between biodosimetry and physical dosimetry was observed for samples of blood and SMRs exposed to γ-rays. Significant differences were observed in the reconstructed doses by the two dosimetry methods for samples exposed to x-ray photons with energy below 100 keV. The discrepancy is probably due to the energy dependence of mass energy-absorption coefficients of the samples extracted from the phones. Our results of comparative validation of the radiation doses reconstructed by luminescence dosimetry from smartphone components with biodosimetry using DCA from human blood suggest the potential use of smartphone components as an effective emergency triage tool for high photon energies.
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Dissertations / Theses on the topic "Dosimetry applications"

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Jardine, Paul. "Applications of gel based chemistry dosimetry." Thesis, Queensland University of Technology, 1994. https://eprints.qut.edu.au/37183/1/37183_Jardine_1994.pdf.

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The transformation of Fe2+ to Fe3+ ions in ferrous sulphate-agarose-xylenol orange (FAX) gel due to irradiation results in a change of absorbance in the FAX gel, which can then be used for the dosimetry of the x-ray beam. The project's aim was to investigate the performance of a laser based system that determines the dose distribution of an x-ray field by measuring the change in absorbance of the FAX gel due to irradiation. Initially a one-dimensional laser scanning system was constructed to perform calibration tests on the FAX gel. Calibration curves were obtained at different x-ray energies (200 kVp, 300 kVp, 6 MV, 10 MV) for the FAX gel and were approximated by a second order polynomial. The difference in the curve equation coefficients for the four dose curves was approximately 2% and hence indicating that the response of the FAX gel was not energy dependent. From a linear approximation of the calibration curve a G value of 57.8 ± 3.1 was calculated for a dose range of 0-10 Gy. The reproducibility of the FAX gel was investigated through preparation and irradiation of a number of gel samples from a single batch. The standard deviations of absorbance measurements for both irradiated and unirradiated FAX gel samples were 1.2% and 1.1% respectively. These errors compare favourably with the standard deviation of 0.5-1 % in the conventional dosimeter (ion chamber) readings. The source of uncertainties in the FAX gel measurements is considered to be due to the continual thermal oxidation of ferrous ions in the FAX gel. Storage lifetime of the unirradiated FAX gel was investigated under a number of different storage enviroments. After 500 hours, the absorbance of the FAX gel stored under refrigeration increased by 25% whereas the absorbance of the FAX gel stored at room temperature and exposed to fluorescence light increased by 80%. The increase in the absorbance of the FAX gels led to a decrease in the dynamic range of the FAX gel response. A scanning system was constructed to perform two-dimensional scans of a collimated x-ray field, and physical and dynamic wedged fields. For all three fields, the relative dose obtained by the laser based system was found to be within 3% of data acquired using the current standard measurement device (ion chamber). An advantage of the laser based system over the ion chamber was shorter irradiation times were required for data acquisition. These findings demonstrate the potential use of FAX gel phantoms for the acquisition of two-dimensional dose distributions. An alternative scanning method for the FAX gels based on a video camera imaging system was also investigated. This system acquired a two­dimensional dose distribution in a few minutes whereas the laser based system required up to 2 hours. To obtain any quantitative information using the video camera imaging system further investigations involving calibration of the system are required.
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Wang, Yang. "Digital film dosimetry in radiotherapy and the development of analytical applications software." Access electronically, 2005. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20060223.150107/index.html.

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Farajollahi, Ali Reza. "An investigation into the applications of polymer gel dosimetry in radiotherapy." Thesis, Online version, 1998. http://ethos.bl.uk/OrderDetails.do?did=1&uin=uk.bl.ethos.284699.

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Li, Bo. "An inductive superconducting transition-edge nano-detector for nano-dosimetry applications." Thesis, University of Surrey, 2018. http://epubs.surrey.ac.uk/848851/.

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In this thesis I have demonstrated the feasibility of using Inductive Superconducting Transition-Edge Sensor (ISTED) as an excellent nanodosimeter for nano-dosimetry applications. This thesis can be divided broadly into two parts. In the first part, I begin by addressing how the study of low energetic ionising particles in liquid water using concepts from classical mechanics is a valid approach, despite being inside the quantum-classical boundary regime. Based on the circumstantial validity condition, I showed that the percentage uncertainties in nanodosimetric quantities due to Heisenberg's uncertainty principle for sub- 1 keV electrons in liquid water as calculated by GEANT4-DNA is not significant enough to cause changes to their distributions. Important nanodosimetric quantities studied in details are ionisation cluster-size distribution, second order of moment for cluster-size distribution (M₂) and the cumulative frequency of ionisation cluster-size distribution from cluster-size two (F₂). In the second part of my thesis, I have focussed on the design, optimisation, fabrication, characterisation of the superconducting devices. An ISTED is made from three components: a) a Superconducting Quantum Interference Device (SQUID), b) a superconducting thin-film and c) a top layer of thin-film Carbon absorber. I have measured the magnetic flux noise of a nanoSQUID of loop dimension 350 nm and nano- Josephson junctions of dimensions 65 nm x 65 nm as 3 x 10⁻¹⁴ Φ₀² in the white noise region. It is shown that the measured nanoSQUID is more than capable of sub- 10 eV energy detection.
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Abbasinejad, Enger Shirin. "Dosimetry Studies of Different Radiotherapy Applications using Monte Carlo Radiation Transport Calculations." Doctoral thesis, Uppsala University, Department of Oncology, Radiology and Clinical Immunology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-9277.

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Developing radiation delivery systems for optimisation of absorbed dose to the target without normal tissue toxicity requires advanced calculations for transport of radiation. In this thesis absorbed dose and fluence in different radiotherapy applications were calculated by using Monte Carlo (MC) simulations.

In paper I-III external neutron activation of gadolinium (Gd) for intravascular brachytherapy (GdNCB) and tumour therapy (GdNCT) was investigated. MC codes MCNP and GEANT4 were compared. MCNP was chosen for neutron capture reaction calculations. Gd neutron capture reaction includes both very short range (Auger electrons) and long range (IC electrons and gamma) products. In GdNCB the high-energetic gamma gives an almost flat absorbed dose delivery pattern, up to 4 mm around the stent. Dose distribution at the edges and inside the stent may prevent stent edge and in-stent restenosis. For GdNCT the absorbed dose from prompt gamma will dominate over the dose from IC and Auger electrons in an in vivo situation. The absorbed dose from IC electrons will enhance the total absorbed dose in the tumours and contribute to the cell killing.

In paper IV a model for calculation of inter-cluster cross-fire radiation dose from β-emitting radionuclides in a breast cancer model was developed. GEANT4 was used for obtaining absorbed dose. The dose internally in cells binding the isotope (self-dose) increased with decreasing β-energy except for the radionuclides with substantial amounts of conversion electrons and Auger electrons. An effective therapy approach may be a combination of radionuclides where the high self-dose from nuclides with low β-energy should be combined with the inter-cell cluster cross-fire dose from high energy β-particles.

In paper V MC simulations using correlated sampling together with importance sampling were used to calculate spectra perturbations in detector volumes caused by the detector silicon chip and its encapsulation. Penelope and EGSnrc were used and yielded similar results. The low energy part of the electron spectrum increased but to a less extent if the silicon detector was encapsulated in low z-materials.

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Chen, Yongye. "Study of luminescence signals from quartz and their applications in geothermometry." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/b40203955.

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Nasreddine, Abbas. "Alanine/EPR dosimetry for low to medium energy X-ray radiation processing control." Thesis, Strasbourg, 2020. http://www.theses.fr/2020STRAE025.

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L’irradiation par des rayons X de faible à moyenne énergie devient de plus en plus une technique répandue qui remplace des irradiations réalisées par des sources radioactives pour différentes applications telles que l’irradiation du sang, les traitements Sterile Insect Technology et la décontamination des produits alimentaires. Afin de s’assurer que la bonne dose est délivrée au produit, un dosimètre est placé sur ce dernier. Un type de dosimètres utilisé pour ces applications est le dosimètre à l’alanine, qui est équivalent à l’eau dans le cas des photons d’énergie supérieure à 200 keV. Cette thèse présente l’utilisation de l’alanine pour le control et la validation des process d’irradiations réalisés avec des rayons X de faible à moyenne énergie, ainsi que différentes méthodes développées pour déterminer des facteurs correctifs à appliquer à la réponse de ce dosimètre. Ces méthodes reposent sur des mesures expérimentales, des simulations Monte Carlo et des calculs analytiques
Nowadays, low to medium energy X-ray irradiators are starting to replace irradiators using radioactivesources, mainly in the fields of blood irradiations, Sterile Insect Technique and food irradiations. A dosimeter is placed on the irradiated product to ensure that the desired dose is well delivered. One of the dosimetry systems that is used in radiation processing is the alanine/EPR dosimetry system. Alanine is considered as water equivalent, from a dosimetric point of view for photon energies that are higher than 200 keV. However, it loses its water equivalency for lower photon energies.This thesis presents the use of alanine for the control and validation of irradiation processes performed with low to medium energy X-rays, as well as different methods developed to determine corrective factors to be applied to the response of this dosimeter. These methods are based on experimental measurements, Monte Carlo simulations and analytical calculations
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Zvereva, Alexandra [Verfasser], and Katia [Akademischer Betreuer] Parodi. "Advanced modeling for personalized dosimetry in nuclear medicine applications / Alexandra Zvereva ; Betreuer: Katia Parodi." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2017. http://d-nb.info/1170061192/34.

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McCowan, Peter Michael. "in vivo patient dose verification of volumetric modulated arc therapy including stereotactic body radiation treatment applications using portal dose images." Medical Physics, 2015. http://hdl.handle.net/1993/31120.

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The complexity of radiation therapy delivery has increased over the years due to advancements in computing and technical innovation. A system of dose delivery verification has the potential to catch treatment errors and therefore improve patient safety. The goal of this thesis was to create a portal image-based in vivo dose reconstruction model for volumetric modulated arc therapy (VMAT) deliveries, specifically for stereotactic body radiation therapy (SBRT). This model-based approach should be robust and feasible within a clinical setting. VMAT involves the modulation of dose rate, gantry speed, and aperture shaping while the treatment gantry (i.e., x-ray beam) rotates about the patient. In this work, portal images were acquired using an amorphous silicon electronic portal imaging device (a-Si EPID). A geometrical characterization of the linear accelerator (linac) during VMAT delivery was performed. An angle adjustment method was determined which improves each EPID’s angular accuracy to within ±1° of the true physical angle. SBRT delivers large doses over fewer fractions than conventional radiotherapy, therefore, any error during an SBRT delivery will have a greater impact on the patient. In this work, a robust, model-based SBRT-VMAT dose reconstruction verification system using EPID images was developed. The model was determined to be clinically feasible. The accuracy of a 3D in vivo dose reconstruction, using all the EPID images acquired during treatment, is sensitive to the chosen frame averaging per EPID image: the greater the frame averaging, the larger the reconstruction error. Optimization of the EPID frame averaging number as a function of average linac gantry speed and dose per fraction were determined. The EPID-based in vivo dose reconstruction model for SBRT-VMAT developed here was determined to be robust, accurate, and clinically feasible as long as adjustments were made in order to correct for EPID image geometrical errors and frame-averaging errors.
May 2016
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Chen, Yongye, and 陳永曄. "Study of luminescence signals from quartz and their applications in geothermometry." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B40203955.

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Books on the topic "Dosimetry applications"

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Dene, Hocken, and McLaughlin William L, eds. Dosimetry for high dose applications. Gaithersburg, MD: U.S. Dept. of Commerce, National Bureau of Standards, 1988.

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Humphreys, Jimmy C. Dosimetry for high dose applications. Gaithersburg, MD: U.S. Dept. of Commerce, National Bureau of Standards, 1988.

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Farrar, H., and EP Lippincott, eds. Reactor Dosimetry: Methods, Applications, and Standardization. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 1989. http://dx.doi.org/10.1520/stp1001-eb.

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Humphreys, Jimmy C. NBS measurement services: Dosimetry for high dose applications. Washington, D.C: National Bureau of Standards, 1988.

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R, Zimmerman Michael, and Whitehead N, eds. New applications of electron spin resonance: Dating, dosimetry and microscopy. Singapore: World Scientific, 1993.

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Ikeya, Motoji. New applications of electron spin resonance: Dating, dosimetry and microscopy. Singapore: World Scientific, 1993.

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International Symposium on High Dose Dosimetry for Radiation Processing (2nd 1990 Vienna, Austria). High dose dosimetry for radiation processing: Proceedings of an International Symposium on High Dose Dosimetry for Radiation Processing. Vienna: The Agency, 1991.

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American Association of Physicists in Medicine. General Medical Physics Committee. Recommended nomenclature for physical quantities in medical applications of light: Report of Task Group 2, AAPM General Medical Physics Committee. New York, NY: published for American Association of Physicists in Medicine by the American Institute of Physics, 1996.

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Yukihara, Eduardo G. Optically stimulated luminescence: Fundamentals and applications. Chichester, West Sussex: Wiley, 2011.

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Golʹdin, V. A. Ustanovki i apparaty radiat͡s︡ionnoĭ tekhnologii. Moskva: Ėnergoatomizdat, 1985.

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Book chapters on the topic "Dosimetry applications"

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Pillay, M. "Dosimetry." In The Clinical Applications of SPET, 79–120. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0229-2_4.

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Pacilio, Massimiliano, Elisabetta Verdolino, Bartolomeo Cassano, and Giuseppe De Vincentis. "Dosimetry." In Clinical Applications of Nuclear Medicine Targeted Therapy, 393–403. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-63067-0_29.

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Gold, Raymond, James P. McNeece, and Bruce J. Kaiser. "Advances in Continuous Gamma-Ray Spectrometry and Applications." In Reactor Dosimetry, 357–71. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5378-9_35.

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Cremonesi, Marta, Mahila Ferrari, and Francesca Botta. "Dosimetry in PRRT." In Clinical Applications of Nuclear Medicine Targeted Therapy, 297–313. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-63067-0_23.

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Walrand, Stephan. "SPECT/CT for Dosimetry." In Clinical Applications of SPECT-CT, 29–42. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-35283-6_2.

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Walrand, Stephan, and Michel Hesse. "SPECT/CT for Dosimetry." In Clinical Applications of SPECT-CT, 37–55. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-65850-2_3.

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Malinen, Eirik. "EPR Dosimetry in Clinical Applications." In Applications of EPR in Radiation Research, 509–38. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-09216-4_14.

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Stabin, Michael G. "Patient Models for Dosimetry Applications." In Handbook of Nuclear Medicine and Molecular Imaging for Physicists, 141–53. New York: CRC Press, 2021. http://dx.doi.org/10.1201/9780429489549-9.

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Miller, Wayne. "19 The Conundrum of Dosimetry: Its Applications to Pharmacology and Biophysics Are Distinct." In Dosimetry in Bioelectromagnetics, 399–418. 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487–2742: CRC Press, 2017. http://dx.doi.org/10.1201/9781315154572-20.

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Dalci, D., G. Dorter, I. Ilbilgi, and G. Koksal. "Biological Dosimetry And Applications In Turkey." In Environmental Protection Against Radioactive Pollution, 195–200. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-007-0975-1_35.

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Conference papers on the topic "Dosimetry applications"

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Liu, Yanping, Zhaoyang Chen, Yanwei Fan, Weizhen Ba, and Shilie Pan. "A Novel Radiation Dosimetry Based on Optically Stimulated Luminescence." In 16th International Conference on Nuclear Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/icone16-48023.

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Abstract:
A new generation of Alkaline earth sulfides (MgS, CaS, and BaS) doped with rare-earth ions have been identified by the University of Montpellier as the very high sensitivity of these phosphors, the short time constant of the luminescence and the perfectly separated spectra enable many applications in real time and online dosimetry. The online detecting technology of optically stimulated luminescent (OSL) radiation dosimeter main make use of the OSL characteristics of doping the alkaline-earth metal sulphides, makes the material into the thin films for storing energy from Ionizing radiation, the excitation light through optical fibers reached the where under radiation-field, with a sensitive detection device to read out the radiation dose from storing the OSL material, obtains a novel technology of radiation dose measurement. In the previous works, the dosimeter benefits from a printed circuit board mount. Both the sensor and the electronics are exposed to radiation, the problem of the radiation induced damage is supposedly being addressed. In both cases, the use of optical fibers can provide an elegant solution. Optical fibers offer a unique capability for remote monitoring of radiation in difficult-to-access and hazardous locations. Optical fiber can be located in radiation hazardous areas and optically interrogated from a safe distance. Hence, optical fiber dosemeters are immune to electrical and radio-frequency interference that can seriously degrade the performance of remote electronic dosimeters. In this paper, a novel remote optical fiber radiation dosimeter is described. The optical fiber dosimeter takes advantage of the charge trapping materials CaS:Ce, Sm and SrS:Eu, Sm that exhibit optically stimulated luminescence (OSL). The range of the dosimeter is from 0.01 to 1000Gy. The optically stimulated luminescent (OSL) radiation dosimeter technically surveys a wide dynamic measurement range and a high sensitivity. The equipment is relatively simple and small in size, and has low power consumption. This device is suitable for measuring the space radiation dose; it also can be used in high radiation dose condition and other dangerous radiation occasions.
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Yamamoto, Takayoshi, Anatoly Rosenfeld, Tomas Kron, Francesco d’Errico, and Marko Moscovitch. "RPL Dosimetry: Principles and Applications." In CONCEPTS AND TRENDS IN MEDICAL RADIATION DOSIMETRY: Proceedings of SSD Summer School. AIP, 2011. http://dx.doi.org/10.1063/1.3576169.

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O'Keeffe, S., E. Lewis, A. Santhanam, A. Winningham, and J. P. Rolland. "Low dose plastic optical fibre radiation dosimeter for clinical dosimetry applications." In 2009 IEEE Sensors. IEEE, 2009. http://dx.doi.org/10.1109/icsens.2009.5398516.

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McCarthy, D., S. O'Keeffe, and E. Lewis. "Plastic optical fibre X-Ray dosimeter for real-time clinical dosimetry applications." In 2010 IEEE Sensors Applications Symposium (SAS). IEEE, 2010. http://dx.doi.org/10.1109/sas.2010.5439383.

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Oliveira, Carmen H., Florbela Rego, Luis Peralta, and Maria C. Abreu. "Plastic scintillator dosimetry in radiology applications." In 2011 IEEE Nuclear Science Symposium and Medical Imaging Conference (2011 NSS/MIC). IEEE, 2011. http://dx.doi.org/10.1109/nssmic.2011.6154644.

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Majchrowski, Andrzej. "Thermoluminescence in ionizing radiation dosimetry." In Solid State Crystals: Materials Science and Applications, edited by Jozef Zmija. SPIE, 1995. http://dx.doi.org/10.1117/12.224985.

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Lewin, P. A., and M. E. Schafer. "Piezoelectric Polymer Transducers for Ultrasound Dosimetry Applications." In Sixth IEEE International Symposium on Applications of Ferroelectrics. IEEE, 1986. http://dx.doi.org/10.1109/isaf.1986.201196.

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Bueker, Harald, Friedrich W. Haesing, S. Nicolai, and B. Wolters. "Fiber optic radiation dosimetry for medical applications." In OE/LASE '90, 14-19 Jan., Los Angeles, CA, edited by Abraham Katzir. SPIE, 1990. http://dx.doi.org/10.1117/12.17567.

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HENRIKSSON, H., and I. KODELI. "ACTIVITIES AT THE NEA FOR DOSIMETRY APPLICATIONS." In Proceedings of the 13th International Symposium. WORLD SCIENTIFIC, 2009. http://dx.doi.org/10.1142/9789814271110_0080.

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McCarthy, D., S. O'Keeffe, G. Leen, and E. Lewis. "Optical fibre radiation dosimetry for low dose applications." In 2010 Ninth IEEE Sensors Conference (SENSORS 2010). IEEE, 2010. http://dx.doi.org/10.1109/icsens.2010.5689945.

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Reports on the topic "Dosimetry applications"

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Humphreys, Jimmy C., Dene Hocken, and William L. McLaughlin. Dosimetry for high dose applications. Gaithersburg, MD: National Bureau of Standards, 1988. http://dx.doi.org/10.6028/nbs.sp.250-11.

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Felton, J., K. Turteltaub, J. Vogel, R. Balhorn, B. Gledhill, J. Southon, M. Caffee, et al. Accelerator mass spectrometry in the biomedical sciences: Applications in low-exposure biomedical and environmental dosimetry. Office of Scientific and Technical Information (OSTI), May 1990. http://dx.doi.org/10.2172/6947352.

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Kerr, G. (Application of dosimetry system DS86 to individual A-bomb survivors). Office of Scientific and Technical Information (OSTI), April 1990. http://dx.doi.org/10.2172/6936949.

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James, A. C. Dosimetric applications of the new ICRP lung model. Office of Scientific and Technical Information (OSTI), June 1994. http://dx.doi.org/10.2172/10195677.

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Johnson, M. W., and M. W. Drigert. COSL dosimetry for application to on-site inspections: A technical review. Office of Scientific and Technical Information (OSTI), August 1993. http://dx.doi.org/10.2172/10178204.

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Rich, Jeremy C. Investigation of Bubble Dosimeter Suitability for Treaty Verification Applications. Fort Belvoir, VA: Defense Technical Information Center, May 1993. http://dx.doi.org/10.21236/ada270812.

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Hickman, Jr., A. W. Application of a canine 238Pu dosimetry model to human bioassay data. Office of Scientific and Technical Information (OSTI), August 1991. http://dx.doi.org/10.2172/10189498.

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Johnson, M. L. Evaluation of the Science Applications International Corporation PD-4 electronic dosimeter. Office of Scientific and Technical Information (OSTI), November 1993. http://dx.doi.org/10.2172/10110203.

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Swinth, K. L. Considerations in the application of the electronic dosimeter to dose of record. Office of Scientific and Technical Information (OSTI), December 1997. http://dx.doi.org/10.2172/564200.

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Gary W. Phillips. Neutron detection and characterization for non-proliferation applications using 3D computer optical memories [Use of 3D optical computer memory for radiation detectors/dosimeters. Final progress report]. Office of Scientific and Technical Information (OSTI), December 2000. http://dx.doi.org/10.2172/772680.

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