Dosimetry of gamma chamber blood irradiator using Gafchromic EBT film

Vandana, S.; Shaiju, V S; Sharma, S. D.; Mhatre, Sharayu; Shinde, S.; Chourasiya, G.; Mayya, Y. S.

doi:10.1016/j.apradiso.2010.08.018

Cited by 20 publications

(14 citation statements)

References 13 publications

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“…Due to its nearwater equivalence at therapeutic photon energies 1,2 and excellent spatial resolution, 3 RCF is also used extensively for dose verification in high dose-gradient regions and other challenging dosimetric applications. [4][5][6][7][8][9] However, the accuracy of RCF dosimetry is not solely determined by the film itself, but is also dependent on the specific digitizer used. 10 Quantitative use of RCF in clinical dosimetry is often limited by suboptimal characteristics of the readout device.…”

Section: Introductionmentioning

confidence: 99%

A prototype, glassless densitometer traceable to primary optical standards for quantitative radiochromic film dosimetry

et al. 2015

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Section: Introductionmentioning

confidence: 99%

A prototype, glassless densitometer traceable to primary optical standards for quantitative radiochromic film dosimetry

et al. 2015

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“…The two dimensional dose profile of the blood irradiator obtained in this study is in close agreement with the dose profile measured in previous investigations by GAFCHROMIC films. (17) The Gammacell 3000 Elan delivers a uniform dose of 25 Gy when targeted at the center of the canister. The isodose curve was obtained from the data given by the measurements of the factory.…”

Section: Resultsmentioning

confidence: 99%

“…These differences are because of the dissimilarities of pencil source strength and nonuniform intersource spacing at cylindrical periphery. (17) Figures 9 and 10 also compare the dose profiles of different methods that were compared with the results of the factory.…”

Section: Resultsmentioning

confidence: 99%

“…Pelszynski et al (8,9) reported that the minimum possible radiation dose of only 25 Gy is necessary for lymphocytes to be efficiently inactivated in red blood cell units. Also, Anderson et al (10,11) mentioned that gamma irradiation is the only process that effectively prevents transfusion associated GVHD and suggested that blood components and products be irradiated to the lowest recommended dose (15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25) Gy) capable of preventing lymphocyte proliferation before blood transfusions. Nuclear radioactive sources like Cs-137 are used to deliver doses to blood products, and errors in calculating the radioactive decay of the radiation source (7) should be considered as a physical factor influencing the dose delivered to the blood product.…”

Section: Introductionmentioning

confidence: 99%

“…(14) Different dosimeters are used to achieve this objective, for example, Fricke dosimeter and TL dosimeter, as well as GAFCHROMIC films. The first two dosimeters have limited resolutions, while GAFCHROMIC films have good resolution, (15,16,17) but these dosimeters are 2D dosimeters. Gel dosimetry systems are true 3D dosimeters.…”

Section: Introductionmentioning

confidence: 99%

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Dosimetry of gamma chamber blood irradiator using PAGAT gel dosimeter and Monte Carlo simulations

Mohammadyari

Zehtabian

Sina

et al. 2014

J Applied Clin Med Phys

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Currently, the use of blood irradiation for inactivating pathogenic microbes in infected blood products and preventing graft‐versus‐host disease (GVHD) in immune suppressed patients is greater than ever before. In these systems, dose distribution and uniformity are two important concepts that should be checked. In this study, dosimetry of the gamma chamber blood irradiator model Gammacell 3000 Elan was performed by several dosimeter methods including thermoluminescence dosimeters (TLD), PAGAT gel dosimetry, and Monte Carlo simulations using MCNP4C code. The gel dosimeter was put inside a glass phantom and the TL dosimeters were placed on its surface, and the phantom was then irradiated for 5 min and 27 sec. The dose values at each point inside the vials were obtained from the magnetic resonance imaging of the phantom. For Monte Carlo simulations, all components of the irradiator were simulated and the dose values in a fine cubical lattice were calculated using tally F6. This study shows that PAGAT gel dosimetry results are in close agreement with the results of TL dosimetry, Monte Carlo simulations, and the results given by the vendor, and the percentage difference between the different methods is less than 4% at different points inside the phantom. According to the results obtained in this study, PAGAT gel dosimetry is a reliable method for dosimetry of the blood irradiator. The major advantage of this kind of dosimetry is that it is capable of 3D dose calculation.PACS number: 87.53.Bn

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A versatile radiochromic dosimeter for low‐medium gamma radiation and its application to food irradiation

Lopes

Ferreira

Franco

et al. 2017

J of Applied Polymer Sci

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This article presents a novel radiochromic film for selective detection of low-medium (0-10 kGy) gamma radiation ( 60 Co) doses. This dosimeter is based on a printed fluorescent multilayer structure comprising a paper substrate having layers of copper phthalocyanine (DY220) (a green emitter material) on the bottom, and layers of poly[2-methoxy-5(2 0 -ethylhexyloxy)-p-phenylenevinylene] (MEH-PPV) (a green-light absorber, red emitter, and radiation sensitive polymer) on the top. The effect of gamma radiation on the optical properties of DY220/MEH-PPV was described: it was observed as a strong correlation between radiation dose and fluorescent, color coordinates for CIE (1931) chromatic diagram, and Pantone color reference of the dosimeter. The rate of these changes can be altered by manipulation of top-bottom layers to represent easily the radiation dose to be determined in a wide range. This versatile dosimeter has many uses in the field of food radiation for monitoring, quality assurance, and control of the gamma radiation process.

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Dosimetry of gamma chamber blood irradiator using Gafchromic EBT film

Cited by 20 publications

References 13 publications

A prototype, glassless densitometer traceable to primary optical standards for quantitative radiochromic film dosimetry

A prototype, glassless densitometer traceable to primary optical standards for quantitative radiochromic film dosimetry

Dosimetry of gamma chamber blood irradiator using PAGAT gel dosimeter and Monte Carlo simulations

A versatile radiochromic dosimeter for low‐medium gamma radiation and its application to food irradiation

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