Chinese Physics C > 2012, Vol. 36 > Issue(7): 675-680 DOI: 10.1088/1674-1137/36/7/019

Monte Carlo simulation of glandular dose in a dedicated breast CT system

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Abstract：
A dedicated breast CT system (DBCT) is a new method for breast cancer detection proposed in recent years. In this paper, the glandular dose in the DBCT is simulated using the Monte Carlo method. The phantom shape is half ellipsoid, and a series of phantoms with different sizes, shapes and compositions were constructed. In order to optimize the spectra, monoenergy X-ray beams of 5-80 keV were used in simulation. The dose distribution of a breast phantom was studied: a higher energy beam generated more uniform distribution, and the outer parts got more dose than the inner parts. For polyenergtic spectra, four spectra of Al filters with different thicknesses were simulated, and the polyenergtic glandular dose was calculated as a spectral weighted combination of the monoenergetic dose.

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TANG Xiao, ZHAO Wei, WANG Yan-Fang, SHU Hang, SUN Cui-Li, WEI Cun-Feng, CAO Da-Quan, QUE Jie-Min, SHI Rong-Jian and WEI Long. Monte Carlo simulation of glandular dose in a dedicated breast CT system[J]. Chinese Physics C, 2012, 36(7): 675-680. doi: 10.1088/1674-1137/36/7/019

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Received: 2011-10-22
Revised: 2011-11-17

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通讯作者:陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Monte Carlo simulation of glandular dose in a dedicated breast CT system

Corresponding author:TANG Xiao,

Received Date:2011-10-22

Accepted Date:2011-11-17

Available Online:2012-07-05

Abstract:A dedicated breast CT system (DBCT) is a new method for breast cancer detection proposed in recent years. In this paper, the glandular dose in the DBCT is simulated using the Monte Carlo method. The phantom shape is half ellipsoid, and a series of phantoms with different sizes, shapes and compositions were constructed. In order to optimize the spectra, monoenergy X-ray beams of 5-80 keV were used in simulation. The dose distribution of a breast phantom was studied: a higher energy beam generated more uniform distribution, and the outer parts got more dose than the inner parts. For polyenergtic spectra, four spectra of Al filters with different thicknesses were simulated, and the polyenergtic glandular dose was calculated as a spectral weighted combination of the monoenergetic dose.

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Monte Carlo simulation of glandular dose in a dedicated breast CT system

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