Breast tomosynthesis: Dosimetry and image quality assessment on phantom

Meyblum, Evelyne; Gardavaud, François; T, Dao; Fournier, V; Beaussart, Pauline; Pigneur, F.; Baranès, Laurence; Rahmouni, Alain; Luciani, Alain

doi:10.1016/j.diii.2014.12.010

Cited by 11 publications

(3 citation statements)

References 31 publications

(49 reference statements)

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“…Higher absorbed dose values by the breast due to the DBT exam in comparison with the DM exam were reported by the National Health Service Breast Screening Program (NHSBSP) Siemens Mammomat Inspiration digital breast tomosynthesis system (Strudley et al 2015). Doses from DBT higher than from DM can also be seen in other works (Rodríguez-Ruiz et al, 2016;Meyblum et al 2015;Gennaro et al 2018). Baptista et al (2015) also observed that in all 25 projections in the DBT, the organs received higher doses than in DM.…”

Section: Contralateral Breastmentioning

confidence: 76%

Dosimetry in Digital Breast Tomosynthesis Evaluated by Monte Carlo Technique

Alves¹,

Belinato

Santos

et al. 2021

Health Physics

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The influence of the angular deviation of the tube during digital breast tomosynthesis (DBT) acquisition to the dose in the examined breast and in other organs and tissues is not well known. In this work, the Monte Carlo method was used with an adult female virtual anthropomorphic phantom to investigate the impact of this angular variation on the breast dose. The absorbed dose in the examined breast was normalized by the air kerma, which resulted in an absorbed dose coefficient (D T /K air ) for the breast. The absorbed dose in each organ was normalized by the glandular dose in the breast, resulting in the relative organ dose (ROD). An adult female virtual anthropomorphic phantom (FSTA_M50_H50) was incorporated into a scenario containing tomosynthesis equipment with Mo/Mo, Mo/Rh, and W/Rh target/filter combinations and tube voltages of 28 kV. The comparison between the results of the simulations considering digital mammography (DM) and DBT data showed that the D T /K air values for the examined breast obtained with the DBT parameters were up to 24 times higher than with the D T /K air obtained with DM parameters. A D T /K air of 0.97 Â 10 −1 mGy mGy −1 was obtained in a DBT exam of the right breast. Considering the other organs, the highest ROD values were observed in the thyroid (6.45 Â 10 −4 ), eyes (3.87 Â 10 −4 ), liver (1.95 Â 10 −5 ), and eye lenses (3.21 Â 10 −3 ). A variation in the absorbed dose values for the breast and other organs was observed for all projections different from 0°.

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Section: Contralateral Breastmentioning

confidence: 76%

Dosimetry in Digital Breast Tomosynthesis Evaluated by Monte Carlo Technique

Alves¹,

Belinato

Santos

et al. 2021

Health Physics

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“…Several parameters influence the MGD of a mammogram. Different MGD are delivered for large CBTs [10,11], for DBT examinations compared to 2D exams, and for MLO (mediolateral-oblique) compared to CC projection. Therefore, the questionnaire specifically requested 20 acquisitions per each 10 mm thickness interval and per projection, for 2D and DBT examinations.…”

Section: Data Collectionmentioning

confidence: 99%

Proposed DRLs for mammography in Switzerland

Dupont,

Aberle,

Botsikas

et al. 2024

J. Radiol. Prot.

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Objectives:The aim of this study is to propose Diagnostic Reference Levels (DRLs) values for mammography in Switzerland.Methods:For the data collection, a survey was conducted among a sufficient number of centres, including 5 University hospitals, several cantonal hospitals, and large private clinics, covering all linguistic regions of Switzerland to be representative of the clinical practice. The data gathered contained the mean glandular dose (MGD), the compressed breast thickness (CBT), the mammography model and the examination parameters for each acquisition. The data collected was sorted into the following categories: 2D or digital breast tomosynthesis (DBT) examination, craniocaudal (CC) or mediolateral oblique (MLO) projection, and 8 categories of compressed breast thickness (CBT) ranging from 20mm to 100mm in 10mm intervals.Results:24762 acquisitions acquired in 31 centres on 36 mammography units from 6 different manufacturers were collected. The analysis showed that the data reflects the practice in Switzerland.The results revealed that the MGD is larger for DBT than for 2D acquisitions for the same CBT. From 20-30mm to 90-100mm of CBT, the 75th percentile of the MGD values obtained increased from 0.81mGy to 2.55mGy for 2D CC acquisitions, from 0.83mGy to 2.96mGy for 2D MLO acquisitions, from 1.22mGy to 3.66mGy for DBT CC acquisitions and from 1.33mGy to 4.04mGy for DBT MLO acquisitions.Conclusion:The results of the survey allow us to propose Swiss DRLs for mammography according to the examination type (2D/DBT), projection (CC/MLO) and CBT. The proposed values are very satisfactory in comparison with other studies.

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“…Information on the actual breast shape could enhance image processing techniques [1]- [3] and dosimetric estimates [4] in digital mammography (DM) and digital breast tomosynthesis (DBT). For this purpose, we aim to develop an accurate three-dimensional (3D) model of the compressed breast shape for the cranio-caudal (CC) view as well as medio-lateral oblique (MLO) view, obtained during DM and DBT acquisitions.…”

Section: Description Of Purposementioning

confidence: 99%

First evaluation of 3D measurements of the compressed breast shape for digital breast tomosynthesis in the medio-lateral oblique view

Pinto

Egten²,

Michielsen

et al. 2023

Medical Imaging 2023: Physics of Medical Imaging

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Improving the modeling of the breast shapes during mechanical compression in both cranio-caudal (CC) and medio-lateral oblique (MLO) views can enhance the development of image processing and dosimetric estimates in digital mammography and digital breast tomosynthesis (DBT). In previous work, a CC model was created using a pair of optical structured light scanning systems, but acquiring similar data for an MLO view model during clinical practice proved impractical with these devices. The present work instead uses two smartphone infrared cameras with 3D-printed holders to obtain surface scans for the MLO view during a DBT acquisition. The study compared the average distance between the MLO breast shape information recorded by the smartphone-based scans to the corresponding DBT exam-based surface scan for 20 patient breasts. Results showed that there was close overlap between the smartphone-based scanned surfaces of the breast and the corresponding DBT images. The agreement between the breast shape represented by these surfaces was dependent on the smartphone-based scanner precision, the segmentation procedure used to obtain the DBT surface, and the manual alignment of the smartphone-based left and right-side view of the breast. The agreement was however of sufficiently good quality for the data to be used for the development of an MLO breast shape model.

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Breast tomosynthesis: Dosimetry and image quality assessment on phantom

Abstract: Doses are significantly greater in 3D than in 2D. With tomosynthesis, out of the three phantoms tested, only phantom BR3D showed a higher rate of visible inserts.

Cited by 11 publications

References 31 publications

Dosimetry in Digital Breast Tomosynthesis Evaluated by Monte Carlo Technique

Dosimetry in Digital Breast Tomosynthesis Evaluated by Monte Carlo Technique

Proposed DRLs for mammography in Switzerland

First evaluation of 3D measurements of the compressed breast shape for digital breast tomosynthesis in the medio-lateral oblique view

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