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Articoli di riviste sul tema "Radiation dosimetry"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

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 o

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2

Arumbifa, Farhansyah Yunandani, Deni Kurniawan, Desalsa Anggoro Diani, et al. "Evaluation of Tartrazine Solution as a Potential Gamma Dosimeter Material." International Journal of Applied Sciences and Smart Technologies 6, no. 2 (2024): 379–92. https://doi.org/10.24071/ijasst.v6i2.9283.

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Radiation dosimetry plays a crucial role in various fields, including medical, industrial, and environmental applications. Accurate and reliable dosimeters are essential for measuring and controlling radiation exposure. This study aims to evaluate the stability of the food dye tartrazine as a potential gamma radiation dosimeter. The need for accessible and cost-effective dosimetric materials motivates the exploration of tartrazine's capabilities in this regard. This research investigates the response of tartrazine solutions under varying gamma radiation doses (0 to 3.118 kGy) using UV-Vis spec

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Titov, N. V. "Methodology for Measuring the Dose Rate of Pulsed Bremsstrahlung Radiation using Gamma Radiation Dosimeters with Geiger-Muller Counter." Journal of the Russian Universities. Radioelectronics 27, no. 3 (2024): 97–107. http://dx.doi.org/10.32603/1993-8985-2024-27-3-97-107.

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Introduction. Industrial monitoring of pulsed bremsstrahlung radiation is associated with a number of challenges. Russia produces only three dosimeters that can be used for measuring pulsed bremsstrahlung radiation with a pulse duration of less than 10 gs. These dosimeters, in addition to being rather expensive, have a number of significant restrictions on the energy range (10 MeV) and the minimum pulse duration (10 ns). The DKG-RM1621 dosimeter with a Geiger-Muller counter can be used for dosimetry of photon radiation with energies up to 20 MeV. However, this device is not intended for dosime

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Jain, Gourav K., Arun Chougule, Ananth Kaliyamoorthy, and Suresh K. Akula. "Study of dosimetric characteristics of a commercial optically stimulated luminescence system." Journal of Radiotherapy in Practice 16, no. 4 (2017): 461–75. http://dx.doi.org/10.1017/s1460396917000346.

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AbstractBackgroundOptically stimulated luminescence dosimeters (OSLDs) have a number of advantages in radiation dosimetry making them an excellent dosimeter for in vivo dosimetry. The study aimed to study the dosimetric characteristics of a commercial optically stimulated luminescence (OSL) system by Landauer Inc., before using it for routine clinical practice for in vivo dosimetry in radiotherapy. Further, this study also aimed to investigate the cause of variability found in the literature in a few dosimetric parameters of carbon-doped aluminium oxide (Al2O3:C).Materials and methodsThe comme

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5

West, William Geoffrey, and Kimberlee Jane Kearfott. "Optically Stimulated Luminescence Dosimetry: An Introduction." Solid State Phenomena 238 (August 2015): 161–73. http://dx.doi.org/10.4028/www.scientific.net/ssp.238.161.

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A subset of solid state materials have long been used as integrating dosimeters because they store energy deposited as a result of their interactions with ionizing radiation and then, when stimulated appropriately, release a proportionate amount of visible or near-visible light. During the 1960s, thermoluminescent dosimeters (TLDs), for which heat is used to extract the stored dosimetric signal, began to replace the photographic film as occupational dosimeters of record and for medical dosimetry. At the end of the twentieth century, a viable optically stimulated luminescent (OSL) material was

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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 (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

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Noorin, Eftekhar Sadat, Shahzad Feizi та Shahram Moradi Dehaghi. "Novel radiochromic porphyrin-based film dosimeters for γ ray dosimetry: investigation on metal and ligand effects". Radiochimica Acta 107, № 3 (2019): 271–78. http://dx.doi.org/10.1515/ract-2018-3055.

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Abstract As the utilizing of porphyrins and metalloporphyrins in high dose dosimetry becomes more prevalent, research on structural effects of these molecules on dosimetric characteristics and physicochemical properties of their film dosimeters becomes more and more essential. The present study emphasizes dosimetry (measuring radiolytic bleaching of two novel film dosimeters with spectrophotometric methods against 60Co γ-rays exposure in dose range of 0–100 kGy) and evaluating substituent effects on the radiation response of the film dosimeters (role of organic groups and changing the metal co

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Wickramasinghe, Sachini Udara, Vijitha Ramanathan, and Sivananthan Sarasanandarajah. "Evaluating Occupational Radiation Exposure in Interventional Cardiology: An Investigation into Estimating Effective Dose." KDU Journal of Multidisciplinary Studies 5, no. 2 (2023): 157–65. http://dx.doi.org/10.4038/kjms.v5i2.87.

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To safeguard the safety and well-being of interventional cardiology healthcare workers, monitoring their occupational radiation exposure is crucial. This study evaluates the radiation dose of interventional cardiologists using the Swiss Ordinance for personal dosimetry approach. Its primary aim is to estimate the radiation dose for each operator engaged in interventional cardiology procedures to protect from dangerous levels of radiation. Additionally, this study assesses the correlation between under-apron and over-apron dosimeters. Notably, no previous studies in Sri Lanka have specifically

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Piotrowski, Michał, Piotr Maras, Zbigniew Stempień, Radosław Wach, and Marek Kozicki. "Deformable Fricke-XO-Gelatin Radiochromic Dosimeter of Ionizing Radiation and Its Applications in Quality Assurance Tests for Radiation Therapy." Materials 18, no. 13 (2025): 3135. https://doi.org/10.3390/ma18133135.

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This work presents a Fricke radiochromic gel dosimeter with xylenol orange (XO) and a gelatin matrix modified with sorbitol. The dosimeter, combined with 2D scanning using a flatbed scanner and data processing using dedicated software packages, creates a radiotherapy dosimetry measurement system. The dosimeter reacts to ionizing radiation by changing color as a result of the formation of complexes of Fe3+ and XO molecules. It was characterized in terms of thermal and chemical stability and mechanical properties. The presence of sorbitol improved the mechanical and thermal properties of the dos

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Vargas-Segura, Walter, and Laura Rojas-Rojas. "Implementation of a high dose routine dosimetry in a self-shielded irradiator." UNED Research Journal 16 (July 1, 2024): e5229. http://dx.doi.org/10.22458/urj.v16i1.5229.

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Introduction: Ionizing radiation is applied in various fields, and dosimetric control guarantees the quality and safety of products during the irradiation process. There is a need for dosimetric calibration procedures in industrial irradiation plants, specifically for self-shielded irradiation systems. Objective: To implement high dose dosimetry in the routine control of irradiated materials within a self-shielded irradiator. Methods: We worked with 32 dosimeters; we divided the dose range used into 8 points and used four RED Perspex dosimeters per point. We measured the specific absorbance fo

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Jung, Aleksandra, and Katarzyna Matusiak. "New trends in clinical and retrospective dosimetry." Bio-Algorithms and Med-Systems 19, no. 1 (2023): 69–73. http://dx.doi.org/10.5604/01.3001.0054.1972.

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Selecting the proper dosimeter and methodology is crucial for accurate dose measurement, especially since the requirements are different for clinical and retrospective dosimetry. Regardless of the field-radiotherapy, X-ray diagnostic radiology or nuclear medicineefforts are continuously being made to improve radiation measurement accuracy through the development of new dosimeters, accurate calibration of instrumentation, training of staff, proper quality control and enhancement of radiation safety procedures. For instance, for retrospective dose estimation during radiation accidents, the selec

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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 accepte

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13

Hossain, Z., S. Purohit, N. Arobi, M. S. Rahman, and AKM M. H. Meaze. "Study of the Response and Calibration Procedures of LiF:Mg, Ti TLD-100 for the Dosimetry of Photon Beam." Bangladesh Journal of Physics 29, no. 2 (2025): 59–67. https://doi.org/10.3329/bjphy.v29i2.79346.

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To guarantee quality assurance and quality control of the received radiation dose and treatment level, Thermoluminescent Dosimeter (TLD) is frequently employed in personal control and monitoring equipment. TLDs are commonly used to ensure the precise delivery of radiation doses to patients in clinical radiotherapy, diagnostic radiology, personal radiation monitoring, and environmental radiation dosimetry. Even though the manufacturer made all the TLDs in the same batch, their sensitivity varies. This study aims to examine the TLD crystal calibration process, in particular, the crystal sensitiv

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Noorin, Eftekhar Sadat, Shahzad Feizi, and Shahram Moradi Dehaghi. "Dosimetric characterization of novel polycarbonate/porphyrin film dosimeters for high dose dosimetry: study on complexation effect." Radiochimica Acta 106, no. 8 (2018): 695–702. http://dx.doi.org/10.1515/ract-2017-2839.

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Abstract Two novel radiochromic films with 20 μm thickness were made from casting of solutions of polycarbonate (PC) containing 0.5 wt.% tetra phenyl porphyrin (TPPH2) and 5,10,15,20-tetraphenyl-21H,23H-porphine iron(III) chloride (Fe-TPP). Dosimetric characterization of the films as routine dosimeters were studied by spectrophotometric method. On subjecting TPPH2/PC and Fe-TPP/PC film dosimeters to gamma radiation, radiolytic bleaching of films was observed. The effects of metal-complexation on the radiation response of the film dosimeters were studied under 60Co γ-rays exposure in dose range

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15

Nascimento, G. G., C. R. Silva, V. P. Campos, and L. L. Campos. "Assessment of energy and angular dependence of LiF:Mg,Ti dosimeters irradiated in the quantity Hp(0.07)." Brazilian Journal of Radiation Sciences 11, no. 1A (2023): 01–11. http://dx.doi.org/10.15392/2319-0612.2023.2142.

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Radiation dosimetry has the purpose of quantifying the dose received by the occupationally exposed individual. The device used in this process is called a dosimeter, the dosimeter can be used in different situations, for example, the dosimeter used to quantify the dose received in the fingers is the ring model dosimeter, for the extremity, which is the focus of this work. In Brazil, we still do not have standards for the calibration of extremity dosimeters, therefore, in this work, the CASEC recommendations were used, adapted for extremity dosimetry. For a dosimeter to be used in its respectiv

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Beinke, Christina, Christian Siebenwirth, Michael Abend, and Matthias Port. "Contribution of Biological and EPR Dosimetry to the Medical Management Support of Acute Radiation Health Effects." Applied Magnetic Resonance 53, no. 1 (2021): 265–87. http://dx.doi.org/10.1007/s00723-021-01457-5.

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AbstractIn this review, we discuss the value of biological dosimetry and electron paramagnetic resonance (EPR) spectroscopy in the medical management support of acute radiation syndrome (ARS). Medical management of an ionizing radiation scenario requires significant information. For optimal medical aid, this information has to be rapidly (< 3 days) delivered to the health-care provider. Clinical symptoms may initially enable physicians to predict ARS and initiate respective medical treatment. However, in most cases at least further verification through knowledge on radiation exposure detail

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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 (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

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Pham Thi, Thu Hong, Thi Ly Nguyen, Thanh Duoc Nguyen, Binh Doan, Van Chung Cao, and Thi The Doan. "The international calibration procedure for B3 film dosimetry system to ensure the quality irradiated products by 10 MeV electron beam accelerators at VINAGAMMA." Nuclear Science and Technology 7, no. 2 (2021): 38–43. http://dx.doi.org/10.53747/jnst.v7i2.110.

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We performed an in-plant calibration of dosimetry system by electron beam (EB)irradiating the B3 film dosimeters at VINAGAMMA, and inter-compared with the alanine dosimetry, which were supplied and analyzed by Risø High Dose Reference Laboratory (HDRL) as the reference standard. The results revealed that the relative deviation between the values of absorbed doses obtained with our dosimeter and the transfer standards dosimeter measured by HDRL was within the acceptable limitation (about ± 3.0 % in the target range of 2.0-10.0 kGy). And post-irradiation stability of B3 film dosimeters was still

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Mantuano, Andrea, Arissa Pickler Oliveira, Carla Lemos da Silva Mota, et al. "INVESTIGATION ON THE USE OF FRICKE DOSIMETRY FOR COSMIC RADIATION." REVISTA FOCO 16, no. 10 (2023): e3282. http://dx.doi.org/10.54751/revistafoco.v16n10-048.

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The dosimetry of cosmic radiation outside Earth's atmosphere is a significant challenge due to the high complexity of radiation fields encountered in Low Earth Orbit (LEO) and interplanetary space, in addition to the constraints imposed by instrument spaceflight. The Fricke dosimeter is a water-based (96% by mass) chemical dosimetry system that offers the potential to measure the absorbed dose in water in an arbitrary geometry, for doses of up to 400 Gy, for different energy spectra. The LCR/UERJ was part of the Cubes in Space project. The main goal of this work was to obtain absorbed doses in

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Chant, Tim, and Prabhakar Ramachandran. "Design and Development of a Low-cost Integrated Dosimeter for External Beam Dosimetry in Radiation Oncology." Journal of Medical Physics 48, no. 4 (2023): 392–97. http://dx.doi.org/10.4103/jmp.jmp_107_23.

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Radiation dosimeters play a crucial role in radiation oncology by accurately measuring radiation dose, ensuring precise and safe radiation therapy. This study presents the design and development of a low-cost printed circuit board (PCB) dosimeter and an integrated electrometer with sensitivity optimized for dose rates intended for use in megavoltage radiation therapy. The PCB dosimeter was designed in KiCad, and it uses a low-cost S5MC-13F general-purpose 1 kV 5A power diode as a radiation detector. The dosimeter is calibrated against a known dose derived from an ionization chamber and tested

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Alhassan, M., A. Abdulrahman, and I. S. Mustafa. "Response of 2-Hydroxymethyl Methacrylate Polymer Gel Dosimeter with Maltose Additive for Radiation within Diagnostic X-Ray Energies." Journal of Applied Sciences and Environmental Management 27, no. 4 (2023): 849–52. http://dx.doi.org/10.4314/jasem.v27i4.29.

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The use of polymer gel dosimeters (PGD) in x-ray radiography has not yet been confirmed. However, if it could be applied, it could help to improve patient dosimetry, dose optimization, and quality assurance through its three-dimensional (3D) image display. This research aimed to evaluate the response of a 2-hydroxymethyl methacrylate (HEMA) polymer gel dosimeter at lower energies for possible use in diagnostic x-ray radiography and to determine the effect of maltose concentrations on the sensitivity. The dosimeter was made under normoxic conditions using Gelatin, HEMA, N, N’- Methylene – bis –

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El-Kelany, Moshira, and Sameh Gafar. "Development of two dosimeters for industrial use with low doses." Nuclear Technology and Radiation Protection 32, no. 2 (2017): 148–54. http://dx.doi.org/10.2298/ntrp1702148e.

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The present study involves a comparison between two dosimetry systems. The first system depends on victoria blue B (incorporating polyvinyl alcohol) as a thin-film dosimeter. The second system depends on the same dye as a liquid dosimeter, which is more sensitive to gamma rays. The prepared film/liquid has a considerable signal that increases upon irradiation and the intensity of the signal decrease with increasing radiation dose. The gamma ray absorbed dose for these dosimeters was found to be up to 25 kGy for the thin film and 700 Gy for the liquid form. Radiation chemical yield, additive su

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Kim, Jeongho, Jeehoon Park, Byungdo Park, Yonghoon Kim, Beomjun Park, and So Hyun Park. "Compact and Real-Time Radiation Dosimeter Using Silicon Photomultipliers for In Vivo Dosimetry in Radiation Therapy." Sensors 25, no. 3 (2025): 857. https://doi.org/10.3390/s25030857.

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Existing dosimeters for radiation therapy are typically large, and their performance in in vivo system applications has not been assessed. This study develops a compact real-time dosimeter using silicon photomultipliers, plastic scintillators, and optical fibers and evaluates its in vivo applicability for radiation therapy. Dose calibration, dose-rate dependency and linearity, and short-term repeatability tests were conducted using solid water phantoms and bolus materials, and in vivo dosimetry was performed using an in-house phantom. The characterization evaluation results showed high lineari

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Komar, D. I., R. V. Lukashevich, V. D. Guzov, and S. A. Kutsen. "METROLOGICAL SUPPORT OF DOSIMETRY GAMMA-RAY WITH ENERGY TO 10 MEV FOR RADIATION PROTECTION DEVICES." Devices and Methods of Measurements 8, no. 3 (2017): 279–85. http://dx.doi.org/10.21122/2220-9506-2017-8-3-279-285.

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The field of high-energy gamma-ray for the calibration of radiation protection devices can be obtained by capturing thermal neutrons from titanium target (to 7 MeV) and nickel target (to 10 MeV). The aim of this work was to determine the metrological characteristics of capture gamma-ray fields from titanium target and nickel target obtained at the AT140 Neutron Calibration Facility to provide dosimetry up to 10 MeV.We have chosen energy intervals in which we can calibrate dosimetry devices taking into account the accompanying generation of gamma-ray neutrons by the fast neutron source 238PuBe,

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Paprocki, K., J. Winiecki, R. Kabacińska, K. Przegietka, M. Szybowicz, and K. Fabisiak. "Thermoluminescence properties of undoped diamond films deposited using HF CVD technique." Materials Science-Poland 35, no. 4 (2018): 785–90. http://dx.doi.org/10.1515/msp-2017-0103.

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Abstract Natural diamond has been considered as a perspective material for clinical radiation dosimetry due to its tissuebiocompatibility and chemical inertness. However, the use of natural diamond in radiation dosimetry has been halted by the high market price. The recent progress in the development of CVD techniques for diamond synthesis, offering the capability of growing high quality diamond layers, has renewed the interest in using this material in radiation dosimeters having small geometricalsizes. Polycrystalline CVD diamond films have been proposed as detectors and dosimeters of β and

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Ha, Xuan Vinh, Phan Thao Tien Doan, and Chi Thang Nguyen. "Effects of Gamma and Beta Radiations to Dosimeters Fabricated from K₂YF₅ and K₂GdF₅." Nuclear Science and Technology 4, no. 3 (2014): 47–54. http://dx.doi.org/10.53747/jnst.v4i3.236.

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K2YF5 and K2GdF5 doped with rare earth can be used as thermoluminescent (TL) dosimeters for gamma, beta radiations. In this study, the K2YF5 and K2GdF5 doped with Tb, Pr, Sm, and Dy with different concentrations were synthesized by solid state reaction method. These double fluoride dosimeters were irradiated with different radiations, namely beta and gamma. The study results showed that in general, the TL intensity of K2GdF5 is higher than that of K2YF5. The K2GdF5 crystals doped with Tb3+, Pr3+ have very high TL sensitivities. But the sensitivities of Sm3+, Dy3+ doped- are very low. The TL gl

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Omanwar, S. K., K. A. Koparkar, and Hardev Singh Virk. "Recent Advances and Opportunities in TLD Materials: A Review." Defect and Diffusion Forum 347 (December 2013): 75–110. http://dx.doi.org/10.4028/www.scientific.net/ddf.347.75.

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Thermoluminescence (TL) is the thermally stimulated emission of light from an insulator or a semiconductor following the previous absorption of energy from ionizing radiation. TL dosimetry is used in many scientific and applied fields such as radiation protection, radiotherapy, industry, and environmental and space research, using many different materials. The basic demands of a thermoluminescent dosimeter (TLD) are good reproducibility, low hygroscopicity, and high sensitivity for very low dose measurements and good response at high doses in radiotherapy and in mixed radiation fields. In this

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Teichmann, Tobias, Lotte Ligaya Schaap, Andre Poremba, et al. "Dosimetry for low-energy electron beam applications at Fraunhofer FEP." Nukleonika 69, no. 2 (2024): 81–85. http://dx.doi.org/10.2478/nuka-2024-0011.

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Abstract Accelerating electrons to achieve chemical and biological effects is a well-established competence of Fraunhofer FEP. Today, there is a large variety of low-energy electron beam applications with a broad range of absorbed doses, e.g. modification of plastics, plasma-chemical syntheses, pollutant removal in wastewaters and exhaust gases, sterilization of medical products, disinfection of seeds, biocompatible functionalization of implants and stimulation of biotechnological processes. This calls for reliable, sensitive, and flexible methods for dosimetry. Radiochromic films are suitable

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Prlić, Ivica, Marija Mihić, Gordana Marović, and Tomislav Meštrović. "Total Occupational Exposure During Characterisation, Conditioning, and Securing of Radioactive Sealed Sources: A New Dosimetric Concept Using Active Electronic Dosimeters." Archives of Industrial Hygiene and Toxicology 60, no. 1 (2009): 53–60. http://dx.doi.org/10.2478/10004-1254-60-2009-1913.

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Total Occupational Exposure During Characterisation, Conditioning, and Securing of Radioactive Sealed Sources: A New Dosimetric Concept Using Active Electronic DosimetersRadiation dosimetry in protection against ionising radiation involves research of all possible pathways through which natural or man-made radioactive materials can contaminate a habitat and actually harm its biota. It also takes into account natural and artificial (man-made) electromagnetic ionizing radiation (γ and x radiation). This article presents a dosimetric study assessing exposure to man-made ionising radiation of loca

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Titova, V. A., D. A. Kokontsev, and T. S. Belle. "CLINICAL PROBLEMS OF DIRECT DOSIMETRY (IN VIVO) IN CONTACT RADIATION THERAPY." Biomedical Photonics 7, no. 2 (2018): 19–24. http://dx.doi.org/10.24931/2413-9432-2018-7-2-19-24.

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The use of multicomponent methods of special treatment (surgery, polychemotherapy, radiation therapy, laser photodynamic therapy) in oncology requires the control of doses in the tumor and healthy organs with high accuracy. A method of direct dosimetry using fiber-optic scintillation dosimeter MCD-4 is proposed. The dosimeter is fixed on endostats and is visualized on CT/MRI. The coordinates are entered into the anatomical units and dosimetry calculations, the data are mapped, the doses are adjusted on medical grounds. The developed technique of direct dosimetry allows monitoring of the contac

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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. Dependin

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Petkovic, Jelena, Ivana Mladenovic, Nikola Vukelic, Milos Mojovic, and Goran Bacic. "Lanthanide doped alkaline metal sulphates as candidates for EPR dosimetry." Journal of the Serbian Chemical Society 65, no. 10 (2000): 743–54. http://dx.doi.org/10.2298/jsc0010743p.

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The applicability of lanthanide doped alkaline metal sulphates as a new type of dosimeters for EPR dosimetery of ionizing radiation has been investigated in an attempt to obtain a dosimeter with better characteristics than the commonly used alanine dosimeter. Irradiation of samples doped with different lanthanides (Y, Ln, Gd) showed that the best sensitivity is obtained using dosimeters doped with Y2(S04)3. Different procedures for manufacturing dosimeters were studied and an optimum procedure was established. The time stability of the EPR signal of the irradiated Y2(S04)3 dosimeter was invest

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Ozerskyi, Kostiantyn, Andrii Pustovyi, and Volodymyr Skliarov. "Experimental study of dosimetric properties of thermoluminescent powder TLD-100." Ukrainian Metrological Journal, no. 3 (October 18, 2023): 45–53. http://dx.doi.org/10.24027/2306-7039.3.2023.291964.

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Abstract (sommario):

The creation of a scientifically substantiated quality assurance system for dosimetry and the optimization of medical exposure of the population of Ukraine during diagnostic and therapeutic procedures (and the possibility of dosimetric control and monitoring of emergency situations) falls within the field of the application of ionizing radiation sources (IRs). Trends in modern medicine in most countries, including Ukraine, prove a continued increase in the share of medical exposure. The main requirements and recommendations for the use of IRs for medical purposes while ensuring the radiation s

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Basharin, V. A., V. V. Zatsepin, M. A. Karamullin, et al. "Biological dosimetry – modern opportunities and prospects for diagnosis of acute radiation damage." Bulletin of the Russian Military Medical Academy 21, no. 4 (2019): 228–34. http://dx.doi.org/10.17816/brmma630102.

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Abstract (sommario):

In case of large-scale radiation incidents, timely detection of overexposed persons and determination of the severity of radiation injuries will be of great importance. The main methods of diagnosing acute radiation injuries are the methods of physical and biological dosimetry. In practice, in case of radiation accidents, physical dosimetry may be unavailable due to the lack of individual dosimeters, lack of information about the duration of exposure, dose rate, distance to the source of ionizing radiation, etc. Under such conditions, biological dosimetry becomes a reliable source of data on p

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35

Fonseca, Lorena, Daniel Silva Calheiro, Amir Mesquita, Thêssa Alonso, and Peterson Squair. "Calibration and evaluation of the MTS-N dosimeter for absorbed dose measurement in blood components." Brazilian Journal of Radiation Sciences 12, no. 4A (Suppl.) (2025): e2502. https://doi.org/10.15392/2319-0612.2024.2502.

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Abstract (sommario):

The use of ionizing radiation has significantly expanded, particularly in the healthcare sector, where the irradiation of blood components prevents transfusion-associated graft-versus-host disease (TA-GvHD). The ISO ASTM 51939:2017 standard establishes a minimum dose of 25 Gy for this procedure, requiring a precise and traceable dosimetric system. This study investigates the calibration of MTS-N thermoluminescent dosimeters at the Gamma Irradiation Laboratory (LIG) of CDTN, which currently uses radiochromic films for routine dosimetry. The dosimeters were calibrated using a RISØ TL/OSL DA-20 r

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Лисин, В., and V. Lisin. "On Some Methodological Issues of Studying Cytogenetic Effects in Cancer Patients Treated with Neutron Therapy Using U-120 Cyclotron." Medical Radiology and radiation safety 63, no. 2 (2018): 47–54. http://dx.doi.org/10.12737/article_5ac620f416a449.50054749.

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Abstract (sommario):

Purpose: To study dosimetric characteristics of neutron radiation field, to determine their role in the formation of the total cytogenetic effect in the patient’s body and to assess the cytogenetic dosimetry capabilities in improving the quality of NT. Material and methods: A therapeutic beam with the average neutron energy of ~6.3 MeV was obtained from the V-120 cyclotron. The radiation field of the beam was investigated with the help of two ionization chambers with different sensitivity to neutrons. Chamber with high and low sensitivities were made of polyethylene and graphite, respectively.

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Lebedenko, I. M. "Experience of Using in Vivo Dosimetry in Clinical Practice." Meditsinskaya Fizika, no. 2 (June 28, 2024): 66–80. http://dx.doi.org/10.52775/1810-200x-2024-102-2-66-80.

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Abstract (sommario):

Purpose: To familiarize medical physicists with the experience of in vivo dosimetry in the practice of radiation therapy and experimental work at the N.N. Blokhin National Medical Research Center of Oncology. Materials and methods: The main characteristics, operating principles and experience of using semiconductor detectors and thermoluminescent dosimeters in the practice of radiation therapy and experimental work are described. Results: It was shown that thermoluminescent dosimeters and semiconductor detectors are still relevant when conducting point by-point relative dosimetry and cannot be

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Muhamad, Shalina Sheik, Siti Zulaiha Hairaldin, Muhd Izham Ahmad, Shahrina Akma Mansur, and Noor Hasni M. Ali. "Radiation dosimetry for quality control of silicon wafer using electron beam." IOP Conference Series: Materials Science and Engineering 1285, no. 1 (2023): 012014. http://dx.doi.org/10.1088/1757-899x/1285/1/012014.

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Abstract (sommario):

Abstract Dosimetry studies using electron beams were performed with energies of up to 3 MeV, 2mA with various trolley speeds on the silicon wafer. The silicon wafer came with diameters of 152.4 and 203.2 mm with a thickness of 0.5 mm. The irradiations were performed by utilising the EPS 3000 Cockcroft-Walton type 3.0 MeV, 90 kwatts electron beam (EB) accelerator. Plastic film dosimeter, cellulose triacetate (CTA) was used as a dosimeter with a UV-vis spectrophotometer as the readout system. The dose setting in this investigation was ~100 kGy for 152.4 mm diameter and ~160 kGy for 203.2 mm diam

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Piskunou, V. S., and I. G. Tarutin. "Static small radiation fields and detectors for relative small field dosimetry in external beam radiotherapy." Doklady BGUIR 19, no. 5 (2021): 94–101. http://dx.doi.org/10.35596/1729-7648-2021-19-5-94-101.

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Abstract (sommario):

The aim of this work is to analyze existing detectors for the relative dosimetry of small radiation fields in external beam radiation therapy and the requirements for them, consider the problems in carrying out dosimetry of small radiation fields, determine the physical conditions under which an external photon beam can be designated as a small field. In modern radiation therapy, there is an increase in the use of small static fields, which is facilitated by the general availability of standard and optional multileaf collimators and new generation treatment machines of various designs. There i

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40

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 (2022): 2887. http://dx.doi.org/10.3390/polym14142887.

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Abstract (sommario):

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, PR

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Rühm, Werner, Pascal Pihet, and Helmut Schuhmacher. "The European Radiation Dosimetry Group—a 40 year success story." Radiation Protection Dosimetry 199, no. 15-16 (2023): 1659–69. http://dx.doi.org/10.1093/rpd/ncac193.

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Abstract (sommario):

Abstract The European Radiation Dosimetry Group (EURADOS) was founded in 1982. Since then, the group has continuously developed and is currently a network of 80 institutions and more than 600 individual scientists across Europe, including exchange with the scientific community outside of Europe. EURADOS supports research and development of dosimetry and harmonising dosimetric practices. This paper describes the major milestones in the history of the organization. It starts from the very beginning when the idea was born and describes periods during which the role and strategy of the network had

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42

König, Alexander Marc, Robin Etzel, Rohit Philip Thomas, and Andreas H. Mahnken. "Personal Radiation Protection and Corresponding Dosimetry in Interventional Radiology: An Overview and Future Developments." RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren 191, no. 06 (2019): 512–21. http://dx.doi.org/10.1055/a-0800-0113.

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Abstract (sommario):

Background The increasing number of minimally invasive fluoroscopy-guided interventions is likely to result in higher radiation exposure for interventional radiologists and medical staff. Not only the number of procedures but also the complexity of these procedures and therefore the exposure time as well are growing. There are various radiation protection means for protecting medical staff against scatter radiation. This article will provide an overview of the different protection devices, their efficacy in terms of radiation protection and the corresponding dosimetry. Method The following key

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Solodkiy, Vladimir, Andrey Pavlov, V. Titova, and A. Tsybulsky. "CONTACT RADIATION THERAPY (BRACHYTHERAPY): CLINICAL CONCEPT OF DIRECT DOSIMETRY [IN VIVO] AND QUALITY ASSURANCE OF RADIATION THERAPY." Problems in oncology 66, no. 4 (2020): 398–403. http://dx.doi.org/10.37469/0507-3758-2020-66-4-398-403.

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Abstract (sommario):

Contact radiation therapy (brachytherapy): the clinical concept of direct dosimetry [in vivo] and quality assurance of radiation therapy the issues of organizing the brachytherapy process with the possibility of confirming the calculated doses obtained on planning systems by direct dosimetry with scintillation small-size dosimeters with the technology of their placement, fixation and visualization are Considered. The coincidence of the calculation data with the measurement results helps to improve quality assurance, especially when using the fractionation mode of a single focal dose of more th

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44

Ubizskii, S., O. Poshyvak, and Ya Zhydachevskii. "ANALYSIS OF THE RADIOISOTOPES RECOGNITION POSSIBILITY BY MEANS OF THE ABSORBED DOSE MEASUREMENT WITH DOSIMETRIC DETECTORS OF DIFFERENT DENSITY." Information and communication technologies, electronic engineering 3, no. 1 (2023): 154–62. http://dx.doi.org/10.23939/ictee2023.01.154.

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Abstract (sommario):

The work is devoted to the problem of identifying an unknown source of g-radiation as a task of emergency dosimetry in the case of the use for terrorist purposes of the radiation-dispersive devices, known also as dirty bomb. The possibility of identifying an unknown g-source is considered based on the energy dependence of the absorption of ionizing photon radiation, which in passive dosimetry manifests itself as dosimetric sensitivity. Radioisotope recognition is analyzed by the ratio of dosimetric sensitivities of heavy (with a high value of the effective atomic number Zeff) and light (with a

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45

Secerov, Bojana, and Goran Bacic. "Calibration of routine dosimeters in radiation processing: Validation procedure for in-plant calibration." Nuclear Technology and Radiation Protection 26, no. 3 (2011): 271–74. http://dx.doi.org/10.2298/ntrp1103271s.

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Abstract (sommario):

The essential prerequisite of radiation dosimetry is to provide quality assurance and documentation that the irradiation procedure has been carried out according to the specification requirement of correct calibration of the chosen dosimetry system. At the Radiation Plant of the Vinca Institute of Nuclear Sciences we compared two recommended protocols of irradiation procedures in the calibration of dosimetry systems in radiation processing: (1) by irradiation of routine dosimeters (ethanol-chlorobenzene - ECB) at the calibration laboratory and (2), by in-plant calibration with alanine transfer

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46

Mochizuki, Anri, Takuya Maeyama, Yusuke Watanabe, and Shinya Mizukami. "Sensitivity enhancement of DHR123 radio-fluorogenic nanoclay gel dosimeter by incorporating surfactants and halogenides." RSC Advances 10, no. 48 (2020): 28798–806. http://dx.doi.org/10.1039/d0ra02717k.

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Abstract (sommario):

Dosimetry of spatial dose distribution of ionizing radiation in tissue equivalent materials using high sensitive radio-fluorogenic gel dosimeter using DHR123 with sensitizer. (Radiation therapy planning image courtesy of Varian Medical Systems, Inc. All rights reserved.)

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47

Carlier, Bram, Sophie V. Heymans, Sjoerd Nooijens, et al. "A Preliminary Investigation of Radiation-Sensitive Ultrasound Contrast Agents for Photon Dosimetry." Pharmaceuticals 17, no. 5 (2024): 629. http://dx.doi.org/10.3390/ph17050629.

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Abstract (sommario):

Radiotherapy treatment plans have become highly conformal, posing additional constraints on the accuracy of treatment delivery. Here, we explore the use of radiation-sensitive ultrasound contrast agents (superheated phase-change nanodroplets) as dosimetric radiation sensors. In a series of experiments, we irradiated perfluorobutane nanodroplets dispersed in gel phantoms at various temperatures and assessed the radiation-induced nanodroplet vaporization events using offline or online ultrasound imaging. At 25 °C and 37 °C, the nanodroplet response was only present at higher photon energies (≥10

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48

Kozicki, Marek, Piotr Maras, and Malwina Jaszczak-Kuligowska. "3D Polymer Gel Dosimeters with iCBCT 3D Reading and polyGeVero-CT Software Package for Quality Assurance in Radiotherapy." Materials 17, no. 6 (2024): 1283. http://dx.doi.org/10.3390/ma17061283.

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Abstract (sommario):

Dynamically evolving radiotherapy instruments require advancements in compatible 3D dosimetry systems. This paper reports on such tools for the coincidence test of the mechanical and radiation isocenter for a medical accelerator as part of the quality assurance in routine radiotherapy practice. Three-dimensional polymer gel dosimeters were used in combination with 3D reading by iterative cone beam computed tomography and 3D data processing using the polyGeVero-CT software package. Different polymer gel dosimeters were used with the following acronyms: VIP, PAGAT, MAGIC, and NIPAM. The same sch

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49

Rabaeh, Khalid, and Ahmed Basfar. "Optical evaluation of dithizone solution as a new radiochromic dosimeter." Pigment & Resin Technology 49, no. 4 (2020): 249–53. http://dx.doi.org/10.1108/prt-10-2019-0091.

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Abstract (sommario):

Purpose The purpose of this paper is to propose a new dithizone solution dosimeter for high radiation applications such as polymers applications and food irradiation. Design/methodology/approach Gamma-rays cell of Co-60 source with 8.4 kGy/h dose rate was used to irradiate the dithizone solutions at different irradiation temperatures. The optical measurements of unirradiated and irradiated dithizone dye solution dosimeters were performed using a UV/VIS spectrophotometer at absorption peaks of 421 and 515 nm. Findings The new dosimeter improved significantly with the increase of dithizone dye c

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50

Kubiak, Tomasz. "Advances in EPR Dosimetry in Terms of Retrospective Determination of Absorbed Dose in Radiation Accidents." Current Topics in Biophysics 41, no. 1 (2018): 11–21. http://dx.doi.org/10.2478/ctb-2018-0002.

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Abstract (sommario):

AbstractThe electron paramagnetic resonance measurements of dosimetric signals originating from radicals generated under the influence of ionizing radiation allow to determine the dose absorbed by the casualties of radiation accidents. The study material can consist of victim’s teeth, bones or nails. Also human hair and mineral glass from personal electronic devices, that people had in the moment of accident, are considered to be useful in dosimetry. Although X-band (9.4 GHz) spectrometers predominate, Q-band devices (34 GHz) enable to increase the sensitivity of measurements and reduce the si

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