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Updated: Apr 16, 2026
Clinical Imaging of Microwave Mammography
Published on: November 14, 2025
Complete internal audit of a mammography service in a reference institution for breast imaging
Gustavo Machado Badan1, Décio Roveda Júnior2, Carlos Alberto Pecci Ferreira3
1Specialist in Breast Imaging, MD, Second Assistant Physician, Santa Casa de São Paulo, Coordinator for the Unit of Interventional Procedures, FEMME - Laboratório da Mulher, São Paulo, SP, Brazil.
Objective:
Undertaking of a complete audit of the service of mammography, as recommended by BI-RADS(®), in a private reference institution for breast cancer diagnosis in the city of São Paulo, SP, Brazil, and comparison of results with those recommended by the literature.
Materials And Methods:
Retrospective, analytical and cross-sectional study including 8,000 patients submitted to mammography in the period between April 2010 and March 2011, whose results were subjected to an internal audit. The patients were followed-up until December 2012.
Results:
The radiological classification of 7,249 screening mammograms, according to BI-RADS, was the following: category 0 (1.43%), 1 (7.82%), 2 (80.76%), 3 (8.35%), 4 (1.46%), 5 (0.15%) and 6 (0.03%). The breast cancer detection ratio was 4.8 cases per 1,000 mammograms. Ductal carcinoma in situ was found in 22.8% of cases. Positive predictive values for categories 3, 4 and 5 were 1.3%, 41.3% and 100%, respectively. In the present study, the sensitivity of the method was 97.1% and specificity, 97.4%.
Conclusion:
The complete internal audit of a service of mammography is essential to evaluate the quality of such service, which reflects on an early breast cancer detection and reduction of mortality rates.
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