Application of clear polymethylmethacrylate dosimeter Radix W to a few MeV electron in radiation processing

Seito, Hajime; Ichikawa, Tatsuya; Hanaya, Hiroaki; Sato, Yoshishige; Kaneko, Hirohisa; Haruyama, Yasuyuki; Watanabe, Hiroshi; Kojima, Takuji

doi:10.1016/j.radphyschem.2009.07.018

Cited by 4 publications

(3 citation statements)

References 10 publications

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“…In such situations, alternative solid phantoms such as solid water, plastic water, virtual water, PMMA, polystyrene, etc. which are nominally equivalent to water may be employed [21,[23][24][25]. However, due to a slight difference in physical density and effective atomic number with respect to water, the spatial, angular, and energy distribution of the electron beam inside the plastic phantom may be different from what would be observed in water at the same physical depth [17,20].…”

Section: Introductionmentioning

confidence: 99%

On the measurement of scaling factors in the RW3 plastic phantom during high energy electron beam dosimetry

2023

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Ionometric electron dosimetry inside water-equivalent plastic phantoms demands special considerations including determination of depth scaling and uence scaling factors (c pl and h pl ) to shift from in-phantom measurements to those relevant to water. This study evaluates these scaling factors for RW3 slab phantom and also introduce a new coe cient, k(RW3), for direct conversion from RW3 measurements to water without involving scaling factors.The RW3 solid phantom developed by the PTW Company was used and the corresponding scaling factors including c pl , h pl , and k(RW3) were measured for conventional electron energies of 4, 6, 9, 12, and 16 MeV. Separate measurements were performed in water and in the RW3 slab phantom using the Advanced Markus chamber. The validity of the reported scaling factors was con rmed by comparing the direct and indirect percentage depth dose (PDD) measurement in water and in the RW3 phantom.The c pl values for the RW3 phantom were respectively equal to 0.915, 0.927, 0.934, 0.937, and 0.937 for 4, 6, 9, 12, and 16 MeV electron energies. The h pl and k(RW3) values were dependent on the investigation depth and on the electron energy. Application of the c pl -h pl factors and of the k(RW3) coe cients to measured data inside the RW3 can reliably reproduce the measured PDD curves in water. The mean difference between the PDDs measured directly and indirectly in water and in the RW3 phantom was less than 1.5% in both approaches for PDD conversion (c pl -h pl coupling and the use of k(RW3)).The scaling factors measured and the k(RW3) coe cients are su ciently relevant to mimic water-based dosimetry results through indirect measurements inside the RW3 slab phantom. Nevertheless, employing k(RW3) is more straightforward than the c pl -h pl approach because it does not involve scaling and it is also less time-consuming.

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Section: Introductionmentioning

confidence: 99%

On the measurement of scaling factors in the RW3 plastic phantom during high energy electron beam dosimetry

2023

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“…The most obvious solution was to exploit the physical, optical, and color changes following radiation treatment. , The most widespread solution was based on composite films whose matrix is an easy-to-cast polymer that interacts with different host molecules without affecting their colorimetric, physical, or optical characteristics. , At present, functional polymers are widely investigated in various fields. − Several polymers have been reported as matrices of thin-film dosimeters, such as PVA, nylon-6, polystyrene, polymethyl methacrylate, and polyvinyl chloride. Their possible doping using different dyes preceding their irradiation was studied, and their dosimetric efficiency was evaluated. − In line with this, the investigation of PVA-doped films has shown great interest in several studies and research. , PVA has shown more opportunities due to its low cost, availability, nontoxicity, water solubility, and ability to incorporate a wide range of transition metal salts and dyes. − Currently, nanofibrous materials via different electrospinning technologies are widely reported and proven effective in various biomedical applications including tissue engineering, wound dressing, drug delivery, regenerative medicine, disease modeling, and detection/biodetection. − These sustainable electrospun composites were effective due to their ease of operation, nanoscale diameter, wide specific surface, high porosity, cost-effectiveness, and the considerable adaptability for engineering eco-friendly bioactive nanomaterials. , Electrospun nanomaterials synthesized by mixing high molecular weight polymers and different sensitive dye molecules could be an effective way to prepare various nanomaterials as dosimeters of different γ-ray exposure levels.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, and Performance of Pyridomethene–BF2 Fluorescence Dye-Doped PVA Thin Film and PVP Nanofibers as Low γ-ray Dosimeters

et al. 2022

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Currently, particular attention is paid to public health related to the field of γ-ray dosimetry, which is becoming increasingly important in medical diagnostic processes. Incorporating sensitive dyes as radiation dose sensors in different material hosts has shown promising radiation dosimetry application routes. In this perspective, the current study proposes a new fluorescent dye based on boron difluoride complex, the pyridomethene–BF2 named 2-(1-(difluoroboraneyl)-1,2-dihydroquinolin-2-yl)-2-(1-methylquinoxalin-2-ylidene) acetonitrile (DBDMA) as an indicator for low γ-ray doses. The different optical and quantum chemical parameters and the spectral behavior of the selected fluorescent dye were first studied. Then, PVP/DBDMA electrospun nanofibers and PVA/DBDMA thin films were prepared. The different UV–vis spectrophotometric and fluorescence studies revealed a clear change after exposure to different γ-ray doses. Thermogravimetric analysis exhibited excellent thermal stability of the prepared nanocomposite films, showing altered thermal behavior after γ-ray treatment. Furthermore, the SEM evaluation displayed a significant modification in the surface morphology of the two designed nanomaterials with increased radiation dose intensity. These novel forms of dosimeter designed in nanoscale composites could therefore constitute a promising and efficient alternative for rapid and accurate detection of low doses of γ-rays in various medical applications.

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“…The most suitable choice was the use of thin films based on different polymers [ 23 , 24 ]. Numerous researches and publications have reported the investigation of polyamide-6, polyvinyl alcohol and polystyrene films dopped with various dyes, in the detection of various types of radiation [ 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Development, Characterization and Valuable Use of Novel Dosimeter Film Based on PVA Polymer Doped Nitro Blue Tetrazolium Dye and AgNO3 for the Accurate Detection of Low X-ray Doses

et al. 2021

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Currently, the uncontrolled exposure of individuals to X-rays during medical examinations represents a substantial danger that threatens both medical professionals and patients. Therefore, radiation dosimetry for low X-ray doses is a very important control of radiation practice in medical diagnostic radiology. In line with this, the current study proposes a valuable dosimeter-based PVA thin film doubly doped with silver nitrate salt and nitro blue tetrazolium dye. The nanocomposite film was prepared via a simple casting method and the different processing parameters were optimized. The performance of radiation detection was evaluated according to optical, chromic, chemical and structural changes after exposure to variable low X-ray doses (0, 2, 4, 10 and 20 mGy). The different film labels exhibited an excellent stability behavior in dark and light upon 30 days of storage. The UV-Vis spectrophotometric study showed a gradual increase in the maximum absorbance as a function of the dose and the corresponding response curve confirmed this linear variation (R = 0.998). A clear structural modification was recorded via X-ray diffraction (XRD) analysis revealing the increase in crystallinity with the level of the dose received by the nanocomposite films. Microscopic surface analysis via SEM assessments revealed a significant morphological change in PVA/Ag+/NBT films exposed to increased radiation doses and typical dendrites growing in needle- or tree-like microstructures appeared with a high X-ray dose. Finally, the nanocomposite films before and after irradiation were evaluated via a spectrocolorimetric study and the different CIELab coordinates, the color difference, as well as the color strength, showed a linear correlation with the intensity of the applied dose. This new dosimeter design could, therefore, provide a promising and efficient alternative for prompt and accurate detection of low X-rays doses in diagnostic radiology.

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Application of clear polymethylmethacrylate dosimeter Radix W to a few MeV electron in radiation processing

Cited by 4 publications

References 10 publications

On the measurement of scaling factors in the RW3 plastic phantom during high energy electron beam dosimetry

On the measurement of scaling factors in the RW3 plastic phantom during high energy electron beam dosimetry

Synthesis, Characterization, and Performance of Pyridomethene–BF2 Fluorescence Dye-Doped PVA Thin Film and PVP Nanofibers as Low γ-ray Dosimeters

Development, Characterization and Valuable Use of Novel Dosimeter Film Based on PVA Polymer Doped Nitro Blue Tetrazolium Dye and AgNO3 for the Accurate Detection of Low X-ray Doses

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