Influence of the components of a radiochromic PVA – Iodide gel dosimeter on the optical dose response

Hayashi, Shin-ichiro; Ono, Kaoru; Fujino, Keisuke; Fujimoto, Sachie

doi:10.1088/1742-6596/1305/1/012031

Cited by 16 publications

(4 citation statements)

References 5 publications

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“…PVA-KI may form a nontoxic, low cost, reusable, highly efficient dose meter. It is easy to use and has excellent characteristics for visualization of radiation in gel form [9]. In addition, its form is easily modified from liquid to gel by changing the concentration of water.…”

Section: Pva-ki Gel and Measurementmentioning

confidence: 99%

Effect of insulating oil covering electrodes on the characteristics of a dielectric barrier discharge

Tran¹,

Oanthavinsak²,

Kado³

et al. 2020

Plasma Sci. Technol.

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In this study, the effects of the fluid cooling and electric field line deformation were investigated in a dielectric barrier discharge (DBD) plasma source. The DBD plasma jet is improved by covering the ground electrode and a power electrode with insulating oil. We obtained positive results as insulating oil prevents arc formation, while it improved the supplied power and plasma jet length, and increased radical production. Radical production of this nonthermal plasma jet is studied with polyvinyl alcohol-potassium iodide liquid.

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Section: Pva-ki Gel and Measurementmentioning

confidence: 99%

Effect of insulating oil covering electrodes on the characteristics of a dielectric barrier discharge

Tran¹,

Oanthavinsak²,

Kado³

et al. 2020

Plasma Sci. Technol.

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“…[43], introduced a similar colorless transparent system with high viscosity which was colored red after irradiation. Hayashi et al, (2019, 2020) [44,45] presented PVA-I dosimeter with gellan gum gelling agent and fructose. The dosimeter's irradiation history can be erased and reset when heated to a certain temperature.…”

Section: Introductionmentioning

confidence: 99%

Optimizing the feasibility of polyvinyl alcohol-potassium iodine gel for medical dosimeter

Rabaeh,

Qawouq,

Eyadeh

et al. 2024

Biomed. Phys. Eng. Express

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This work aims to improve the post stabilty of reusable potassium iodide hydrogel dosimter. A reusable and low-cost radiochromic dosimeter containing a gel matrix of polyvinyl alcohol, potassium iodide dye, froctose as reducing agent and glutaraldehyde as cross-linking agent was developed for dose calibration in radiotherapy. The gel samples were exposed to different absorbed doses using a medical linear acceleration. UV–vis Spectrophotometry was utilized to investigate the changes in optical-properties of irradiated gels with regard to peak wavelength of 353 nm. The stability of the gel (one of the most limitation of using this dosimeter) was improved significantly by the addition of certain concentrations of dimethyl sulfoxide. The two-dimensional optical imaging system of charge-coupled-device (CCD) camera with a uniform RGB light-emitting-diode (LED) array source was used for diffusion coefficient purpose using two dimensional gel template. The value of diffusion coefficient reported is significant and highly reduced compared with other dosimeters reported in the literatures. Moreover, heating the improved gels to certain temperatures results in resetting their optical properties, which makes it possible to reuse for multiple times.

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“…Sunagawa et al reported the red colorization of PVA-KI complexes in applied x-ray and proton beam experiments [33]. Generally, PVA-KI has a complex reaction mechanism [34,35]. Up to this point, it has not been applied in atmospheric plasma research.…”

Section: Introductionmentioning

confidence: 99%

Polyvinyl alcohol–potassium iodide gel probe to monitor the distribution of reactive species generation around atmospheric-pressure plasma jet

Tran¹,

Hu²,

Ogasawara³

et al. 2023

Plasma Sci. Technol.

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Reactive species in the gas-phase region are of great interest for biomedical, agricultural, and industrial applications. At the same time, assessment of the concentration and distribution of reactive species and treatment area control need to be further understood. Visualization of reactive species concentration and distribution has been studied for decades based on a variety of methods. This study proposes polyvinyl alcohol–potassium iodide (PVA–KI) as a novel gel chemical probe. The probe uses the reactions among PVA, KI, water, borax, and oxidative species to visualize the distribution of reactive species. This method provides information regarding the distribution of reactive species by coloration on the gel surface. The effects of the surrounding gas phase on the distribution and diffusion of the reactive species are also investigated using the PVA–KI gel probe. Further, the relationship between the irradiation distance and reactive species diffusion is determined on the surface of the PVA–KI probe with and without plastic shielding. Adjusting the irradiation distance appropriately leads to an increase in the modified area as detected by the PVA–KI gel probe analysis. The relative reactive species concentration distributions are also obtained from visualized color distributions measured using a colorimeter. Further, reactive species generation by long-scale line plasma is confirmed by the color reaction on the PVA–KI gel surface, with a greater area being covered by an atmospheric-pressure pulsed microwave line plasma source.

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Influence of the components of a radiochromic PVA – Iodide gel dosimeter on the optical dose response

Cited by 16 publications

References 5 publications

Effect of insulating oil covering electrodes on the characteristics of a dielectric barrier discharge

Effect of insulating oil covering electrodes on the characteristics of a dielectric barrier discharge

Optimizing the feasibility of polyvinyl alcohol-potassium iodine gel for medical dosimeter

Polyvinyl alcohol–potassium iodide gel probe to monitor the distribution of reactive species generation around atmospheric-pressure plasma jet

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