ASSESSMENT OF MEAN GLANDULAR DOSE IN MAMMOGRAPHY SYSTEM WITH DIFFERENT ANODE-FILTER COMBINATIONS USING MCNP CODE

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GHOLAMKAR LIDA; MOWLAVI ALI ASGHAR; SADEGHI MAHDI; ATHARI MITRA

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Journal Paper

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Journal: Iranian Journal of Radiology Year:2016 | Volume:13 | Issue:4 Page(s): 0-0

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Title

ASSESSMENT OF MEAN GLANDULAR DOSE IN MAMMOGRAPHY SYSTEM WITH DIFFERENT ANODE-FILTER COMBINATIONS USING MCNP CODE

Author(s)

GHOLAMKAR LIDA | MOWLAVI ALI ASGHAR | SADEGHI MAHDI | ATHARI MITRA | Issue Writer Certificate

Keywords

BREAST PHANTOM

DIGITAL MAMMOGRAPHY SYSTEM

MEAN GLANDULAR DOSE

MCNP CODE

Abstract

Background: X-ray mammography is one of the general methods for early detection of breast cancer. Since glandular tissue in the breast is sensitive to radiation and it increases the risk of cancer, the given dose to the patient is very important in mammography.Objectives: The aim of this study was to determine the average absorbed dose of X-ray radiation in the glandular tissue of the breast during mammography examinations as well as investigating factors that influence the MEAN GLANDULAR DOSE (MGD). One of the precise methods for determination of MGD absorbed by the breast is Monte Carlo simulation method which is widely used to assess the dose.Materials and Methods: We studied some different X-ray sources and exposure factors that affect the MGD. “Midi-future” DIGITAL MAMMOGRAPHY SYSTEM with amorphous-selenium detector was simulated using the Monte Carlo N-particle extended (MCNPX) code. Different anode/filter combinations such as tungsten/silver (W/Ag), tungsten/rhodium (W/Rh), and rhodium/aluminium (Rh/Al) were simulated in this study. The voltage of X-ray tube ranged from 24 kV to 32 kV with 2 kV intervals and the BREAST PHANTOM thickness ranged from 3 to 8 cm, and glandular fraction g varied from 10% to 100%.Results: MGD was measured for different anode/filter combinations and the effects of changing tube voltage, phantom thickness, combination and glandular breast tissue on MGD were studied. As glandular g and X-ray tube voltage increased, the breast dose increased too, and the increase of BREAST PHANTOM thickness led to the decrease of MGD. The obtained results for MGD were consistent with the result of Boone et al. that was previously reported.Conclusion: By comparing the results, we saw that W/Rh anode/filter combination is the best choice in breast mammography imaging because of the lowest delivered dose in comparison with W/Ag and Rh/Al. Moreover, breast thickness and g value have significant effects on MGD.

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APA: Copy

GHOLAMKAR, LIDA, MOWLAVI, ALI ASGHAR, SADEGHI, MAHDI, & ATHARI, MITRA. (2016). ASSESSMENT OF MEAN GLANDULAR DOSE IN MAMMOGRAPHY SYSTEM WITH DIFFERENT ANODE-FILTER COMBINATIONS USING MCNP CODE. IRANIAN JOURNAL OF RADIOLOGY, 13(4), 0-0. SID. https://sid.ir/paper/284473/en

Vancouver: Copy

GHOLAMKAR LIDA, MOWLAVI ALI ASGHAR, SADEGHI MAHDI, ATHARI MITRA. ASSESSMENT OF MEAN GLANDULAR DOSE IN MAMMOGRAPHY SYSTEM WITH DIFFERENT ANODE-FILTER COMBINATIONS USING MCNP CODE. IRANIAN JOURNAL OF RADIOLOGY[Internet]. 2016;13(4):0-0. Available from: https://sid.ir/paper/284473/en

IEEE: Copy

LIDA GHOLAMKAR, ALI ASGHAR MOWLAVI, MAHDI SADEGHI, and MITRA ATHARI, “ASSESSMENT OF MEAN GLANDULAR DOSE IN MAMMOGRAPHY SYSTEM WITH DIFFERENT ANODE-FILTER COMBINATIONS USING MCNP CODE,” IRANIAN JOURNAL OF RADIOLOGY, vol. 13, no. 4, pp. 0–0, 2016, [Online]. Available: https://sid.ir/paper/284473/en

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