Overall performance, image quality, and dose, in computed radiology (CR) mammography systems operating in the Mexican public sector

Brandan, María Ester; Ruiz‐Trejo, C.; Cansino, Naxi; Hernandez, J.C.; Moreno-Ramírez, Adriana; Rodriguez-López, Jaime A.; López-Pineda, Eduardo; Gómez-Zepeda, Mario; Chevalier, M.

doi:10.1117/12.2555602

Cited by 4 publications

(3 citation statements)

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“…Commissioning QC tests and program knowledge and implementation were lowly implemented, which is likely due to the fact that administrative personnel, RDs, and RTs are not very aware of national regulations, their responsibilities, and how to carry them out. This lack of QAP/QC programs is in line with what was previously reported in Mexico [21]. In addition, the low number of MP workers indicates non-compliance with Mexican mammography regulations regarding the minimum staff of a breast-cancer detection unit [12], and the low number of MPs within the radiodiagnostic field is in accordance with García-Hernández et al's previous report [14].…”

Section: Discussionsupporting

confidence: 89%

“…Figure 1 showed that the most frequent mammography brands observed were IMS Giotto (31.91%) and Hologic Inc. (23.40%); these brands have appeared in similar studies in Mexico during the last decade, which shows their relatively high presence in the Mexican health sector [16,20,21]. This study provides solid evidence of the low presence of QAP implementation and monitoring in the mammography facilities evaluated.…”

Section: Discussionmentioning

confidence: 53%

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An evaluation of the present status of quality assurance program implementation in digital mammography facilities in a developing country

González-Ruíz¹,

Mendoza²,

Cuevas³

et al. 2022

J. Radiol. Prot.

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The Quality Assurance Program (QAP) implementation in mammography is a key aspect to guarantee image quality acquisition and, thus, an opportune diagnosis of breast cancer. A QAP involves planned and systematic actions as quality control tests (QC) that will produce consistently high-quality images considering a low radiation exposure for stakeholders. Currently, there is poor evidence of the current QAP implementation status in developing countries, particularly in Latin America. In this work, over the period of October 2021 to April 2022, 47 Mexican digital mammography facilities were evaluated in terms of QAP's current status implementation. A survey of 3 key indicators of compliance / non-compliance of QAP was carried out. Also, 17 QC test parameters were assessed in all mammography units according to an international framework. Kruskal-Wallis, Mc Nemar's tests, and Spearman correlation were used to identify the significant correlation between the QC tests and QAP indicators. The statistical analysis showed a significant positive correlation between the QAP indicators and the QC parameters evaluated, especially associated with an increase in image quality. Almost 90 % percent of the facilities evaluated failed in some QAP indicator and only 44.68 % of the facilities have an updated and current program implemented. The successful QAP implementation directly impacted the QC mammography test results, particularly in terms of image quality; thus, conditioning a successful mammography acquisitions chain. The results obtained in this work suggest that better regulations need to be implemented to guarantee QAP surveillance; which could mean an increase in opportune diagnosis and management of breast cancer with radiological safety for patients and occupational exposure personnel.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 53%

An evaluation of the present status of quality assurance program implementation in digital mammography facilities in a developing country

González-Ruíz¹,

Mendoza²,

Cuevas³

et al. 2022

J. Radiol. Prot.

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“…X-ray mammography remains as the gold standard for breast cancer screening and diagnosis around the world (Karellas and Vedantham 2008). Even though developments in the field of breast imaging enabled the clinical use of digital radiography (DR) (Lewin et al 2001, Pisano et al 2005 and digital breast tomosynthesis (DBT) (Niklason et al 1997, Friedewald et al 2014, many countries still rely on computed radiography (CR) for breast imaging (Hong et al 2020, Barufaldi et al 2020, Brandan et al 2020.…”

Section: Introductionmentioning

confidence: 99%

Noise modeling and variance stabilization of a computed radiography (CR) mammography system subject to fixed-pattern noise

Borges

Brochi²,

Xu³

et al. 2020

Phys. Med. Biol.

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In this work we model the noise properties of a computed radiography (CR) mammography system by adding an extra degree of freedom to a well-established noise model, and derive a variance-stabilizing transform (VST) to convert the signal-dependent noise into approximately signal-independent. The proposed model relies on a quadratic variance function, which considers fixed-pattern (structural), quantum and electronic noise. It also accounts for the spatial-dependency of the noise by assuming a space-variant quantum coefficient. The proposed noise model was compared against two alternative models commonly found in the literature. The first alternative model ignores the spatial-variability of the quantum noise, and the second model assumes negligible structural noise. We also derive a VST to convert noisy observations contaminated by the proposed noise model into observations with approximately Gaussian noise and constant variance equals to one. Finally, we estimated a look-up table that can be used as an inverse transform in denoising applications. A phantom study was conducted to validate the noise model, VST and inverse VST. The results show that the space-variant signal-dependent quadratic noise model is appropriate to describe noise in this CR mammography system (errors< 2.0% in terms of signal-to-noise ratio). The two alternative noise models were outperformed by the proposed model (errors as high as 14.7% and 9.4%). The designed VST was able to stabilize the noise so that it has variance approximately equal to one (errors< 4.1%), while the two alternative models achieved errors as high as 26.9% and 18.0%, respectively. Finally, the proposed inverse transform was capable of returning the signal to the original signal range with virtually no bias.

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Performance of analog and digital mammography systems from 2000 to 2016 in Mexico

Brandan,

Mendoza-Méndez,

Ramírez-Reyes

et al. 2023

Xvii Mexican Symposium on Medical Physics

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Overall performance, image quality, and dose, in computed radiology (CR) mammography systems operating in the Mexican public sector

Cited by 4 publications

References 0 publications

An evaluation of the present status of quality assurance program implementation in digital mammography facilities in a developing country

An evaluation of the present status of quality assurance program implementation in digital mammography facilities in a developing country

Noise modeling and variance stabilization of a computed radiography (CR) mammography system subject to fixed-pattern noise

Performance of analog and digital mammography systems from 2000 to 2016 in Mexico

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