Ion diffusion modelling of Fricke-agarose dosemeter gels
In Fricke-agarose gels, an accurate determination of the spatial dose distribution is hindered by the diffusion of ferric ions. In this work, a model was developed to describe the diffusion process within gel samples of finite length and, thus, permit the reconstruction of the initial spatial distri...
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| Veröffentlicht in: | Radiation protection dosimetry 2006-09, Vol.120 (1-4), p.151-154 |
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| container_title | Radiation protection dosimetry |
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| creator | de Pasquale, F. Barone, P. Sebastiani, G. d'Errico, F. Egger, E. Luciani, A. M. Pacilio, M. Guidoni, L. Viti, V. |
| description | In Fricke-agarose gels, an accurate determination of the spatial dose distribution is hindered by the diffusion of ferric ions. In this work, a model was developed to describe the diffusion process within gel samples of finite length and, thus, permit the reconstruction of the initial spatial distribution of the ferric ions. The temporal evolution of the ion concentration as a function of the initial concentration is derived by solving Fick's second law of diffusion in two dimensions with boundary reflections. The model was applied to magnetic resonance imaging data acquired at high spatial resolution (0.3 mm) and was found to describe accurately the observed diffusion effects. |
| doi_str_mv | 10.1093/rpd/nci683 |
| format | Article |
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M.</creatorcontrib><creatorcontrib>Pacilio, M.</creatorcontrib><creatorcontrib>Guidoni, L.</creatorcontrib><creatorcontrib>Viti, V.</creatorcontrib><title>Ion diffusion modelling of Fricke-agarose dosemeter gels</title><title>Radiation protection dosimetry</title><addtitle>Radiat Prot Dosimetry</addtitle><description>In Fricke-agarose gels, an accurate determination of the spatial dose distribution is hindered by the diffusion of ferric ions. In this work, a model was developed to describe the diffusion process within gel samples of finite length and, thus, permit the reconstruction of the initial spatial distribution of the ferric ions. The temporal evolution of the ion concentration as a function of the initial concentration is derived by solving Fick's second law of diffusion in two dimensions with boundary reflections. The model was applied to magnetic resonance imaging data acquired at high spatial resolution (0.3 mm) and was found to describe accurately the observed diffusion effects.</description><subject>Computer Simulation</subject><subject>Diffusion</subject><subject>Dose-Response Relationship, Radiation</subject><subject>Equipment Design</subject><subject>Equipment Failure Analysis</subject><subject>Ferrous Compounds - chemistry</subject><subject>Ferrous Compounds - radiation effects</subject><subject>Gels - chemistry</subject><subject>Gels - radiation effects</subject><subject>Ion Exchange</subject><subject>Materials Testing</subject><subject>Models, Chemical</subject><subject>Models, Molecular</subject><subject>Radiation Dosage</subject><subject>Reproducibility of Results</subject><subject>Sensitivity and Specificity</subject><subject>Sepharose - chemistry</subject><subject>Sepharose - radiation effects</subject><subject>Solutions - chemistry</subject><subject>Solutions - radiation effects</subject><subject>Thermoluminescent Dosimetry - instrumentation</subject><subject>Thermoluminescent Dosimetry - methods</subject><issn>0144-8420</issn><issn>1742-3406</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpFj9FKwzAUhoMobk5vfADptVCXk6RJc6nD2cFQLxSGN6FLTkZdu5ZkA317Kx16c86B8_Hzf4RcA70Dqvk0dG66s5XM-QkZgxIs5YLKUzKmIESaC0ZH5CLGT0qZ0pk4JyOQUgjN9Zjki3aXuMr7Q6z6q2kd1nW12yStT-ahsltMy00Z2oiJ60eDewzJBut4Sc58WUe8Ou4JeZ8_vs2KdPnytJjdL1PLM71PVYYiA6u5t7mlCgRDBwLRCkWzXJdCWqdAWc7WnikpUVMGuQIPgiubST4ht0Ou7UvEgN50oWrK8G2Aml990-ubQb-Hbwa4O6wbdP_o0bcH0gGo4h6__v5l2BqpuMpMsfowq9eCFQ_wbID_ALVpZLs</recordid><startdate>20060901</startdate><enddate>20060901</enddate><creator>de Pasquale, F.</creator><creator>Barone, P.</creator><creator>Sebastiani, G.</creator><creator>d'Errico, F.</creator><creator>Egger, E.</creator><creator>Luciani, A. 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| identifier | ISSN: 0144-8420 |
| ispartof | Radiation protection dosimetry, 2006-09, Vol.120 (1-4), p.151-154 |
| issn | 0144-8420 1742-3406 |
| language | eng |
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| source | Oxford University Press Journals All Titles (1996-Current); MEDLINE |
| subjects | Computer Simulation Diffusion Dose-Response Relationship, Radiation Equipment Design Equipment Failure Analysis Ferrous Compounds - chemistry Ferrous Compounds - radiation effects Gels - chemistry Gels - radiation effects Ion Exchange Materials Testing Models, Chemical Models, Molecular Radiation Dosage Reproducibility of Results Sensitivity and Specificity Sepharose - chemistry Sepharose - radiation effects Solutions - chemistry Solutions - radiation effects Thermoluminescent Dosimetry - instrumentation Thermoluminescent Dosimetry - methods |
| title | Ion diffusion modelling of Fricke-agarose dosemeter gels |
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