Effect of thyroid shielding during mammography : measurements on phantom and patient as well as estimation with Monte Carlo simulation

Pyka, Miriam; Eschle, Patrik; Sommer, Christian; Weyland, Mathias S.; Kubik, Rahel; Scheidegger, Stephan

doi:10.21256/zhaw-1442

Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-1442

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	Effect of thyroid shielding during mammography : measurements on phantom and patient as well as estimation with Monte Carlo simulation
Authors:	Pyka, Miriam Eschle, Patrik Sommer, Christian Weyland, Mathias S. Kubik, Rahel Scheidegger, Stephan
DOI:	10.21256/zhaw-1442 10.1186/s41747-018-0042-9
Published in:	European Radiology Experimental
Volume(Issue):	2
Issue:	14
Issue Date:	2018
Publisher / Ed. Institution:	Springer
ISSN:	2509-9280
Language:	English
Subjects:	Radiation protection; Mammography
Subject (DDC):	618: Gynecology, obstetrics and midwifery
Abstract:	Background: During mammography, the thyroid is exposed to scattered radiation from breast tissue and device. This may increase the risk of radiation induced thyroid cancer. Methods: We investigated the scatter radiation exposition of the thyroid and the effect of a tailored thyroid protection in phantom and patient as well as by using Monte Carlo simulation (MCS). The protective effect of a modified thyroid protection, the relevance of the protective effect and acceptance by patients have been investigated. Results: Phantom and patient measurements provided higher values for the surface dose at thyroid position than expected from MCS (phantom 0.32 mGy; patients 0.38 mGy; MCS 0.16 mGy). Phantom measurements indicated scatter contributions from both breast tissue and collimator/tube system. The value found in our patient study is within the range of the literature (0.22-0.39 mGy). The thyroid protection significantly reduced the surface dose but the dose (0.016 mGy) was higher than that expected from the lead equivalent value. However, the impact of the collar to the effective dose was small (< 4%). The collar was not visible on mammograms. Conclusions: Scatter from the collimator/tube system contributed with 50% to the thyroid dose. Due to the relative small fraction of dose deposited in the thyroid when compared to the mean glandular dose to the breast, a collar is not mandatory in general. Not being associated with the risk of obscuring parts of mammograms, such a collar may be used for young women considering their higher radio sensitivity.
URI:	https://digitalcollection.zhaw.ch/handle/11475/10590
Fulltext version:	Published version
License (according to publishing contract):	CC BY 4.0: Attribution 4.0 International
Departement:	School of Engineering
Organisational Unit:	Institute of Applied Mathematics and Physics (IAMP)
Appears in collections:	Publikationen School of Engineering

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Pyka, M., Eschle, P., Sommer, C., Weyland, M. S., Kubik, R., & Scheidegger, S. (2018). Effect of thyroid shielding during mammography : measurements on phantom and patient as well as estimation with Monte Carlo simulation. European Radiology Experimental, 2(14). https://doi.org/10.21256/zhaw-1442

Pyka, M. et al. (2018) ‘Effect of thyroid shielding during mammography : measurements on phantom and patient as well as estimation with Monte Carlo simulation’, European Radiology Experimental, 2(14). Available at: https://doi.org/10.21256/zhaw-1442.

M. Pyka, P. Eschle, C. Sommer, M. S. Weyland, R. Kubik, and S. Scheidegger, “Effect of thyroid shielding during mammography : measurements on phantom and patient as well as estimation with Monte Carlo simulation,” European Radiology Experimental, vol. 2, no. 14, 2018, doi: 10.21256/zhaw-1442.

PYKA, Miriam, Patrik ESCHLE, Christian SOMMER, Mathias S. WEYLAND, Rahel KUBIK und Stephan SCHEIDEGGER, 2018. Effect of thyroid shielding during mammography : measurements on phantom and patient as well as estimation with Monte Carlo simulation. European Radiology Experimental. 2018. Bd. 2, Nr. 14. DOI 10.21256/zhaw-1442

Pyka, Miriam, Patrik Eschle, Christian Sommer, Mathias S. Weyland, Rahel Kubik, and Stephan Scheidegger. 2018. “Effect of Thyroid Shielding during Mammography : Measurements on Phantom and Patient as Well as Estimation with Monte Carlo Simulation.” European Radiology Experimental 2 (14). https://doi.org/10.21256/zhaw-1442.

Pyka, Miriam, et al. “Effect of Thyroid Shielding during Mammography : Measurements on Phantom and Patient as Well as Estimation with Monte Carlo Simulation.” European Radiology Experimental, vol. 2, no. 14, 2018, https://doi.org/10.21256/zhaw-1442.