Dose sensitivity enhancement on polymer gel with suspended gold particles

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dc.contributor.authorAFONSO, L.C.pt_BR
dc.contributor.authorSCHOFER, F.pt_BR
dc.contributor.authorHOESCHEN, C.pt_BR
dc.contributor.authorCALDAS, L.V.E.pt_BR
dc.contributor.editorDUDALA, JOANNA
dc.contributor.editorSTEGOWSKI, ZDZISLAW
dc.coverageInternacionalpt_BR
dc.creator.eventoINTERNATIONAL CONFERENCE ON DEVELOPMENT AND APPLICATIONS OF NUCLEAR TECHNOLOGIESpt_BR
dc.date.accessioned2014-11-19T11:54:23Zpt_BR
dc.date.accessioned2014-11-19T14:12:47Zpt_BR
dc.date.accessioned2015-04-01T12:41:52Z
dc.date.available2014-11-19T11:54:23Zpt_BR
dc.date.available2014-11-19T14:12:47Zpt_BR
dc.date.available2015-04-01T12:41:52Z
dc.date.eventoSeptember 11-14, 2011pt_BR
dc.description.abstractThe presence of high-Z materials adjacent to soft tissues, when submitted to irradiation, enhances locally the absorbed dose in these soft tissues. Such effects happen due to the outscattering of photoelectrons from the high-Z materials [1,2,3]. To investigate this effect, polymer gel dosimeters with suspended gold microspheres were used. This study was performed using the polymer gel dosimeter known as MAGIC [4]. The polymer gel was produced and divided into two parts. One part was uniformly mixed with gold microspheres at a concentration of 0.5 % by weight and the other part contained only polymer gel. Each part was poured into test tubes, 4 samples per dose were used, in a range from 0 to 6 Gy. The unirradiated samples were taken as control. The samples were irradiated with X-rays generated at 150 kV, filtered with 4 mm Al and 5 mm Cu, at a constant air kerma rate of 18.9 mGy/min. All samples were read using a Bruker 9.4 T Magnetic Resonance scanner. The transversal relaxation rate R2 (measured in terms of T2=1/R2) from each sample (minus the R2 value from the control) was plotted against the nominal delivered dose to obtain the calibration curves. The samples containing polymer gel with gold microspheres presented approximately 20 % higher change of the R2 value per dose in comparison to the samples containing only polymer gel. This result indicates a dose enhancement factor of approximately 20 %. An analytic estimation predicted a dose enhancement factor of 30 %. The calculations are being refined for a closer description of the experimental parameters.
dc.event.siglaNUTECHpt_BR
dc.format.extent61-61
dc.identifier.citationAFONSO, L.C.; SCHOFER, F.; HOESCHEN, C.; CALDAS, L.V.E. Dose sensitivity enhancement on polymer gel with suspended gold particles. In: DUDALA, JOANNA (ed.); STEGOWSKI, ZDZISLAW (ed.). In: INTERNATIONAL CONFERENCE ON DEVELOPMENT AND APPLICATIONS OF NUCLEAR TECHNOLOGIES, September 11-14, 2011, Krakow, Poland. <b>Abstract...</b> Krakow, Poland: Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, 2011. p. 61-61. Disponível em: http://repositorio.ipen.br/handle/123456789/22441.
dc.identifier.orcidhttps://orcid.org/0000-0002-7362-2455
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/22441pt_BR
dc.localKrakow, Poland
dc.local.eventoKrakow, Polandpt_BR
dc.publisherFaculty of Physics and Applied Computer Science, AGH University of Science and Technology
dc.rightsopenAccesspt_BR
dc.subjectx radiationpt_BR
dc.subjectgoldpt_BR
dc.subjectparticlespt_BR
dc.subjectgelspt_BR
dc.subjectpolymerspt_BR
dc.titleDose sensitivity enhancement on polymer gel with suspended gold particlespt_BR
dc.typeResumo de eventos científicospt_BR
dspace.entity.typePublication
ipen.autorF. SCHÖFER
ipen.autorC. HOESCHEN
ipen.autorLINDA V. E. CALDAS
ipen.autorLUCIANA CAMINHA AFONSO
ipen.codigoautor10345
ipen.codigoautor10346
ipen.codigoautor1495
ipen.codigoautor3259
ipen.contributor.ipenauthorF. SCHÖFER
ipen.contributor.ipenauthorC. HOESCHEN
ipen.contributor.ipenauthorLINDA V. E. CALDAS
ipen.contributor.ipenauthorLUCIANA CAMINHA AFONSO
ipen.date.recebimento11-12pt_BR
ipen.event.datapadronizada2011pt_BR
ipen.identifier.ipendoc17548pt_BR
ipen.notas.internasAbstractpt_BR
ipen.type.genreResumo
relation.isAuthorOfPublication4a4e3916-416f-42f4-aa19-7e07eb654047
relation.isAuthorOfPublicatione291bb83-0d4d-421f-a3e0-b22e3823a2ee
relation.isAuthorOfPublication7f46d4f4-dfd6-4485-a767-10df5b4f4f13
relation.isAuthorOfPublicationd14e43cb-42bd-45cd-a993-0038ccfeaef7
relation.isAuthorOfPublication.latestForDiscoveryd14e43cb-42bd-45cd-a993-0038ccfeaef7
sigepi.autor.atividadeAFONSO, L.C.:3259:330:Spt_BR
sigepi.autor.atividadeSCHOFER, F.:10345:-1:Npt_BR
sigepi.autor.atividadeHOESCHEN, C.:10346:-1:Npt_BR
sigepi.autor.atividadeCALDAS, L.V.E.:1495:330:Npt_BR
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