Measurement Method of Ion-beam Relative Intensity Distribution Using γ-Ray Irradiation Response Function of Gafchromic Film HD-V2

Ishizaka, Tomohisa; Yuri, Yosuke; Agematsu, Takashi; Yuyama, Takahiro; Seito, Hajime; Okumura, Susumu

doi:10.3769/radioisotopes.66.251

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…Radiochromic films were used to study the X-ray depth-dose distribution in bulk biological samples [8]. Ishizaka et al utilized a radiochromic film to calculate relative intensity distribution by using gamma-ray irradiation [9].…”

Section: Introductionmentioning

confidence: 99%

Depth-dose distribution in potatoes with low-energy X-rays

Nguyen

Kume²,

Nguyen³

et al. 2022

hueuni-jns

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Irradiation is known as a handful measure to inhibit potato sprouting, kill harmful bacteria, and increase preservation. The absorbed dose is one of the essential characteristics of the irradiation process. In this study, the depth-dose distributions in potatoes and polymethyl methacrylate were investigated under low-energy X-ray irradiation by using the Fricke dosimeter and Gafchromic film dosimeter. The dose rates required for the rays to penetrate in polymethyl methacrylate were compared with those in potatoes. Polymethyl methacrylate could be used as a phantom in measuring the depth dose delivered in potatoes. The difference in depth-dose distribution in potatoes between one-sided and double-sided irradiation was also investigated. The calculated dose uniformity ratio values are 5.8 and 1.9 for potatoes irradiating one-sided and double-sided.

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Section: Introductionmentioning

confidence: 99%

Depth-dose distribution in potatoes with low-energy X-rays

Nguyen

Kume²,

Nguyen³

et al. 2022

hueuni-jns

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“…MeV electron beam under typical radiation processing conditions using radiochromic films. In 2017, T. Ishizaka et al 6 developed a method to measure the ion beam relative intensity distribution using gammaray irradiation response function of gafchromic film HD-V2. The radiochromic film showed good performance with excellent sensitivity to ionizing radiation and without need of chemical or physical processing after irradiation.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of low energy X-ray depth dose distribution by gafchromic film for dosimetry in food irradiation

Van

Nguyen

et al. 2020

Sci. Tech. Dev. J.

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Introduction: Dosimetry is of crucial importance in radiation processing of food. Among others, plastic film has been widely used for dosimetry in radiation therapy since its density is quite similar to the equivalent biological materials. In this study, the depth dose distribution was estimated by using gafchromic film for the purpose of dosimetry in food irradiation. Experimental: The HD-V2 gafchromic dosimetry film was employed to measure the interested dose instead of ion chamber. A stack of 19 PMMA (polymethyl methacrylate) sheets interleaved with 20 pieces of gafchromic film was made. The phantom was applied in the low energy X-ray beams (maximum 100 keV) to obtain the depth dose profile. Results: A significant correlation between absorbed doses (D) and color level or optical density (O.D.) of irradiated dosimetry films was observed. The fitting function has the form of , where a, b, c are the parameters to be fitted. The depth dose distribution in the 30 mm thickness phantom was inferred from the calibration. Conclusion: The present method and the depth dose profile to be obtained are very meaningful in the processing of foodstuffs by radiation.

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Measurement Method of Ion-beam Relative Intensity Distribution Using γ-Ray Irradiation Response Function of Gafchromic Film HD-V2

Cited by 2 publications

References 11 publications

Depth-dose distribution in potatoes with low-energy X-rays

Depth-dose distribution in potatoes with low-energy X-rays

Evaluation of low energy X-ray depth dose distribution by gafchromic film for dosimetry in food irradiation

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