Validation of Monte Carlo simulation of mammography with TLD measurement and depth dose calculation with a detailed breast model
Mean glandular dose (MGD) is not only determined by the compressed breast thickness (CBT) and the glandular content, but also by the distribution of glandular tissues in breast. Depth dose inside the breast in mammography has been widely concerned as glandular dose decreases rapidly with increasing...
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Online Access: | https://doi.org/10.1051/epjconf/201715304017 |
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doaj-c6bd8642444f43fa943e42aa27e898422021-08-02T07:28:51ZengEDP SciencesEPJ Web of Conferences2100-014X2017-01-011530401710.1051/epjconf/201715304017epjconf_icrs2017_04017Validation of Monte Carlo simulation of mammography with TLD measurement and depth dose calculation with a detailed breast modelWang WenjingQiu RuiRen LiLiu HuanWu Zhen0Li Chunyan1Li JunliNuctech Company LimitedNuctech Company LimitedMean glandular dose (MGD) is not only determined by the compressed breast thickness (CBT) and the glandular content, but also by the distribution of glandular tissues in breast. Depth dose inside the breast in mammography has been widely concerned as glandular dose decreases rapidly with increasing depth. In this study, an experiment using thermo luminescent dosimeters (TLDs) was carried out to validate Monte Carlo simulations of mammography. Percent depth doses (PDDs) at different depth values were measured inside simple breast phantoms of different thicknesses. The experimental values were well consistent with the values calculated by Geant4. Then a detailed breast model with a CBT of 4 cm and a glandular content of 50%, which has been constructed in previous work, was used to study the effects of the distribution of glandular tissues in breast with Geant4. The breast model was reversed in direction of compression to get a reverse model with a different distribution of glandular tissues. Depth dose distributions and glandular tissue dose conversion coefficients were calculated. It revealed that the conversion coefficients were about 10% larger when the breast model was reversed, for glandular tissues in the reverse model are concentrated in the upper part of the model.https://doi.org/10.1051/epjconf/201715304017 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Wang Wenjing Qiu Rui Ren Li Liu Huan Wu Zhen Li Chunyan Li Junli |
spellingShingle |
Wang Wenjing Qiu Rui Ren Li Liu Huan Wu Zhen Li Chunyan Li Junli Validation of Monte Carlo simulation of mammography with TLD measurement and depth dose calculation with a detailed breast model EPJ Web of Conferences |
author_facet |
Wang Wenjing Qiu Rui Ren Li Liu Huan Wu Zhen Li Chunyan Li Junli |
author_sort |
Wang Wenjing |
title |
Validation of Monte Carlo simulation of mammography with TLD measurement and depth dose calculation with a detailed breast model |
title_short |
Validation of Monte Carlo simulation of mammography with TLD measurement and depth dose calculation with a detailed breast model |
title_full |
Validation of Monte Carlo simulation of mammography with TLD measurement and depth dose calculation with a detailed breast model |
title_fullStr |
Validation of Monte Carlo simulation of mammography with TLD measurement and depth dose calculation with a detailed breast model |
title_full_unstemmed |
Validation of Monte Carlo simulation of mammography with TLD measurement and depth dose calculation with a detailed breast model |
title_sort |
validation of monte carlo simulation of mammography with tld measurement and depth dose calculation with a detailed breast model |
publisher |
EDP Sciences |
series |
EPJ Web of Conferences |
issn |
2100-014X |
publishDate |
2017-01-01 |
description |
Mean glandular dose (MGD) is not only determined by the compressed breast thickness (CBT) and the glandular content, but also by the distribution of glandular tissues in breast. Depth dose inside the breast in mammography has been widely concerned as glandular dose decreases rapidly with increasing depth. In this study, an experiment using thermo luminescent dosimeters (TLDs) was carried out to validate Monte Carlo simulations of mammography. Percent depth doses (PDDs) at different depth values were measured inside simple breast phantoms of different thicknesses. The experimental values were well consistent with the values calculated by Geant4. Then a detailed breast model with a CBT of 4 cm and a glandular content of 50%, which has been constructed in previous work, was used to study the effects of the distribution of glandular tissues in breast with Geant4. The breast model was reversed in direction of compression to get a reverse model with a different distribution of glandular tissues. Depth dose distributions and glandular tissue dose conversion coefficients were calculated. It revealed that the conversion coefficients were about 10% larger when the breast model was reversed, for glandular tissues in the reverse model are concentrated in the upper part of the model. |
url |
https://doi.org/10.1051/epjconf/201715304017 |
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