Absorbed Dose Measurement in Mammography

Aznar, Marianne C.; Hemdal, Bengt

doi:10.1016/b978-012374212-4.50055-9

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…4,11 In some studies, heterogeneity of breast tissue has been considered. [14][15][16][17] The aim of this study is to evaluate the effect of the presence of breast cysts to DgN with changes in the thickness, the glandular composition of the breast tissue and the voltage of the X-ray tube. Finally, the results will be compared with the situation where homogeneous breast tissue is considered.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of glandular dose in mammography in presence of breast cysts using Monte Carlo simulation

Deevband

Kaveh

Ghorbani

et al. 2021

Polish Journal of Medical Physics and Engineering

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Background: Normalized glandular dose (DgN) is an important dosimetric quantity in mammography. Aim: In this study, the effect of the presence of breast cysts and their size, number and location on DgN is evaluated. Materials and methods: The effect of the presence of cysts in breast was examined using MCNPX code. This was performed by taking homogeneous breast phantoms containing spheroid breast cysts into account. The radius of the cysts, numbers of the cysts, and depth of the cysts, and their location were variable. Various electron energies were also considered. Finally, these results were compared with the results of a cyst-less breast phantom. Results: The results show that the effect of the presence of cysts in the breast depends on the size, number and location of cysts. The presence of cysts at lower depths leads to a decrease in the DgN values, compared to the breast phantom without cysts. The presence of cysts in the breast phantom has an effect of -7 to +14 percent on the DgN values under the conditions considered in this modeling. This effect is independent of the X-ray tube voltage, the breast phantom thickness, and glandular ratio, and depends only on the number and size and location of the cysts. The bigger radius and number of cysts, the greater effect on DgN value.

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Section: Introductionmentioning

confidence: 99%

Evaluation of glandular dose in mammography in presence of breast cysts using Monte Carlo simulation

Deevband

Kaveh

Ghorbani

et al. 2021

Polish Journal of Medical Physics and Engineering

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“…The image quality was assessed by using performance breast phantom. The entrance exposure was converted to the average glandular dose (AGD) according to the used protocol (Perry et al, 2006;IAEA, 2007, Marianne et al, 2008Baoying at al., 2012). Patients average glandular dose per exposure were calculated according to equation 1.…”

Section: Methodsmentioning

confidence: 99%

Performance Assessment and Measurements of Mammographic Glandular Dose Using 8000 NERO-mAx and Radcal Acuu-pro X-ray Test Devices

Nassef¹

2017

Int.J.Curr.Res.Aca.Rev.

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Article InfoIn the present study, a non invasive X-ray test device (8000 Victoreen NERO mAx), and radiation monitor controller (RADCAL-9010) system used to measure the Breast Entrance Dose (BED) in mammographic projection at King Abdulazaiz University Hospital (KAUH), Saudi Arabia. The age distribution and the compressed breast thickness (CBT) of the patients determined based on the information survey from the radiology department logbook. The Average Glandular Dose (AGD) calculated based on the value of the entrance dose and some other imaging technique factors. The X-ray quality control tests were evaluated for beam quality assessment, tube potential accuracy, time accuracy, and reproducibility according to the American College of Radiology (ACR) protocol for the quality control of the mammography imaging technique (Code of practice-TRS 457). The results showed that, good correlation was found between the results obtained from the above mentioned dosemetric systems. The calculated AGD found lower than the international recommended value (3.0 mGy). Also the results give acceptable levels for patient absorbed dose and safety.

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Evaluation of the Quality Control and Quality Assurance in Mammography mobile Unit

Zanaty¹,

Diab

et al. 2019

Journal of Scientific Research in Science

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The aim of this study was to undertake a comprehensive evaluation of selected mammography unit. The materials used mammography machine Philips, multi-electrometer, target and filter combinations W/Rh, Mo/Rh and Mo/Mo and Aluminum layers. The quality control assessment was performed on the selected machine. The assessment was done included kV accuracy and reproducibility and Half Value Layer measurement. The results obtained confirmed that the machine is working correctly and was within acceptable performance criteria. The results of the physical parameters indicated a deviation of tube potential for the examined tube from the nominal values with the standard deviation (± 5%), except the few values exceeds this levels, and the conclusion is that some adjustments showed be done and the have value layer at the nominal tube potential (28kV) was in agreement with the published values.

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Absorbed Dose Measurement in Mammography

Cited by 3 publications

References 13 publications

Evaluation of glandular dose in mammography in presence of breast cysts using Monte Carlo simulation

Evaluation of glandular dose in mammography in presence of breast cysts using Monte Carlo simulation

Performance Assessment and Measurements of Mammographic Glandular Dose Using 8000 NERO-mAx and Radcal Acuu-pro X-ray Test Devices

Evaluation of the Quality Control and Quality Assurance in Mammography mobile Unit

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