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TLD measurements and Monte Carlo simulations for glandular dose and scatter fraction assessment in mammography: a comparative study

2011Journal article Open access
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dc.contributor.authorDi Maria, Salvatore
dc.contributor.authorBarros, Sílvia
dc.contributor.authorBento, Joana
dc.contributor.authorTeles, Pedro
dc.contributor.authorFigueira, Catarina
dc.contributor.authorPereira, Matheus
dc.contributor.authorVaz, P.
dc.contributor.authorPaulo, Graciano
dc.date.accessioned2017-04-19T16:09:02Z
dc.date.available2017-04-19T16:09:02Z
dc.date.issued2011
dc.description.abstractThe main purpose of this study was to validate and compare Mean Glandular Dose (MGD) values obtained using Monte Carlo simulations with experimental values obtained from Entrance Surface Dose (ESD) and depth dose measurements performed in a Hospital mammography unit. ESD and depth dose were measured using ThermoLuminescent Dosimeters (TLDs), and a tissue equivalent mammography phantom recommended by the American College of Radiology (ACR). Measurements and Monte Carlo simulations were also compared with the MGD calculated using the Automatic Exposure Control (AEC) system of the mammographic unit. In the simulations the Doppler energy broadening effect was also taken into account. The simulated ESD are about 5%-10% higher than the measured ESD values. The deviation between the measured and simulated MGD values in the phantom is of about 15%. The MGD evaluated using the AEC system is smaller both with respect to the Monte Carlo simulation and experimental result by a factor of about 15% and 25% respectively. Moreover the BackScatter Factor (BSF) estimated by Monte Carlo simulations was used for the MGD calculation according to the Wu's method. Finally the inclusion of the energy broadening effect on MGD calculation produces negligible variations on the simulated results.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.radmeas.2011.06.072pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.26/18207
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.subjectAmerican college of radiologiespt_PT
dc.subjectBackscattering factorpt_PT
dc.subjectComparative studiespt_PT
dc.subjectDepth dosept_PT
dc.subjectDepth dose measurementspt_PT
dc.subjectDopplerpt_PT
dc.subjectExperimental valuespt_PT
dc.subjectGlandular dosept_PT
dc.subjectMammographicpt_PT
dc.subjectMean glandular dosept_PT
dc.subjectMonte Carlo Simulationpt_PT
dc.subjectScatter fractionspt_PT
dc.subjectSimulated resultspt_PT
dc.subjectSurface dosept_PT
dc.subjectThermoluminescent dosimeterspt_PT
dc.subjectWu's methodpt_PT
dc.titleTLD measurements and Monte Carlo simulations for glandular dose and scatter fraction assessment in mammography: a comparative studypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1108pt_PT
oaire.citation.issue10pt_PT
oaire.citation.startPage1103pt_PT
oaire.citation.titleRadiation Measurementspt_PT
oaire.citation.volume46pt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT

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