Monte Carlo Simulation of X-ray Source Characteristics Using MCPETS and MCNPX Codes for Mammography

Flegontova, E. Yu.; Bakaleĭnikov, L. A.; Nam, Ki-Yong; Park, Jung Gon; Kim, Kyong-Woo; Chon, Kwon Su; Yoon, Kwon‐Ha

doi:10.3938/jkps.51.65

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…First, we analyzed the photon spectrum emitted by the simulated mammography equipment to verify the reliability of the values calculated by the simulation model. The results show that the shape and distribution of the overall spectrum were in good agreement with those reported in the literature 25–28 . In particular, high similarity was observed in the spectrum shape variation depending on the use of an additional filter.…”

Section: Discussionsupporting

confidence: 89%

“…The results show that the shape and distribution of the overall spectrum were in good agreement with those reported in the literature. [25][26][27][28] In particular, high similarity was observed in the spectrum shape variation depending on the use of an additional filter. Consequently, the reliability of the simulated values obtained in this study was verified through the accuracy of the simulated mammography radiation.…”

Section: Discussionmentioning

confidence: 93%

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Development of breast phantoms using a 3D printer and glandular dose evaluation

Lee

Yang

2021

J Applied Clin Med Phys

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In this study, breast phantoms were fabricated by emulating glandular and adipose tissues separately using a three-dimensional (3D) printer. In addition, direct and quantitative glandular dose evaluations were performed. A quantitative method was developed to evaluate the glandular and adipose tissues separately when performing glandular dose evaluations. The variables used for glandular dose evaluation were breast thickness, glandular tissue ratio, and additional filter materials. The values obtained using a Monte Carlo simulation and those measured using a glass dosimeter were compared and analyzed. The analysis showed that as the glandular tissue ratio increased, the dose decreased by approximately 10%, which is not a significant variation. The comparison revealed that the simulated values of the glandular dose were approximately 15% higher than the measured values. The use of silver and rhodium filters resulted in a mean simulated dose of 1.00 mGy and 0.72 mGy, respectively, while the corresponding mean measured values were 0.89 mGy ± 0.03 mGy and 0.62 mGy ± 0.02 mGy. The mean glandular dose can be reliably evaluated by comparing the simulated and measured values.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 93%

Development of breast phantoms using a 3D printer and glandular dose evaluation

Lee

Yang

2021

J Applied Clin Med Phys

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show abstract

“…Al though there were small numer i cal and mor pho log i cal dif fer ences, these appeared to be due to dif fer ences in the pro gram cal cu la tion meth ods, de tailed geo met ric struc tures, and spec trum mea sure ment po si tions. Fur ther more, when the re sults of this study were com pared with those of pre vi ous stud ies [22][23][24], they showed the same trends in terms of the spec trum shape and peak en ergy. There fore, it is be lieved that the X-rays gen erated in this study were re li able.…”

Section: Discussionsupporting

confidence: 70%

Filament material evaluation for breast phantom fabrication using three-dimensional printing

Lee

Kang

et al. 2020

NUCL TECH RAD PROT

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In this study, a method of directly evaluating the dose received by the highly radiation-sensitive mammary gland during mammography was investigated, and a corresponding breast phantom was produced that expresses a mammary gland, as an alternative to the existing mixed-form phantom. After designing this breast phantom by performing Monte Carlo simulations, the glandular dose was evaluated and compared with that of a mixed-form phantom. Then, dose evaluation was conducted for current commercial filament materials that could be used to fabricate the phantom by 3-D printing. The results showed that the dose received by the mammary gland was in the range of 1.089-1.237 mGy, and the average difference from that determined using the mixed-form phantom was approximately 1.2 %. Among the filament materials, polylactic acid showed the dose that was the most similar to that of the mammary gland tissue, differing by approximately 2.4 %. Overall, the research results suggest that it is meaningful to evaluate the glandular dose using the developed phantom instead of a mixed-form phantom. Besides, polylactic acid is the most appropriate material for fabricating the mammary gland tissue using a 3-D printer.

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Estimating the absolute flux distribution for a synchrotron X-ray beam using ionization-chamber measurements with various filters

Stevenson

Lillo

2017

J Synchrotron Radiat

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It is shown that an extensive set of accurate ionization-chamber measurements with a primary polychromatic synchrotron X-ray beam transmitted through various filter combinations/thicknesses can be used to quite effectively estimate the absolute flux distribution. The basic technique is simple but the `inversion' of the raw data to extract the flux distribution is a fundamentally ill-posed problem. It is demonstrated, using data collected at the Imaging and Medical Beamline (IMBL) of the Australian Synchrotron, that the absolute flux can be quickly and reliably estimated if a suitable choice of filters is made. Results are presented as a function of the magnetic field (from 1.40 to 4.00 T) of the superconducting multi-pole wiggler insertion device installed at IMBL. A non-linear least-squares refinement of the data is used to estimate the incident flux distribution and then comparison is made with calculations from the programs SPECTRA, XOP and spec.exe. The technique described is important not only in estimating flux itself but also for a variety of other, derived, X-ray properties such as beam quality, power density and absorbed-dose rate. The applicability of the technique with a monochromatic X-ray beam for which there is significant harmonic contamination is also demonstrated. Whilst absolute results can also be derived in this monochromatic beam case, relative (integrated) flux values are sufficient for our primary aim of establishing reliable determinations of the percentages of the various harmonic components.

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Monte Carlo Simulation of X-ray Source Characteristics Using MCPETS and MCNPX Codes for Mammography

Cited by 3 publications

References 2 publications

Development of breast phantoms using a 3D printer and glandular dose evaluation

Development of breast phantoms using a 3D printer and glandular dose evaluation

Filament material evaluation for breast phantom fabrication using three-dimensional printing

Estimating the absolute flux distribution for a synchrotron X-ray beam using ionization-chamber measurements with various filters

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