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ST 3.2 –
Protección radiológica en radiodiagnóstico
(orientada a la tomografía computada)
COMPARATIVE EVALUATION OF AVERAGE GLANDULAR DOSE AND
IMAGE OF DIGITAL MAMMOGRAPHY AND FILM MAMMOGRAPHY IN
MINAS GERAIS, BRAZIL
Nogueira, M.S.
1
*; Rodrigues, L.L.C.
2
; Oliveira, M. A.
3
; Joana, G. S
4
.;
Silva, S.D.
5
; Leyton, F.
6
1
Development Center of Nuclear Tecnology – CDTN/CNEN. Brasil.
2
Institute of Energy and Nuclear Research - IPEN/CNEN. Brasil.
3
Department of Oncology / Clinics Hospital of Uberlândia - UFU – Uberlândia. Brasil.
4
Post-graduate in Nuclear Science and Technology / Department of Nuclear Energy, Federal
University of Minas Gerais - DEN/UFMG. Brasil.
5
Post-graduate in Nuclear Science and Technology / Department of Nuclear Energy, Federal
University of Minas Gerais - DEN/UFMG. Brasil.
6
Development Center of Nuclear Tecnology – CDTN/CNEN. Brasil
* Autor responsable, email: mnogue@cdtn.br
Breast cancer is the most common cancer among women, and early detection is critical to its
diagnosis and treatment. Mammography is the best method for breast-cancer screening and is
capable of reducing mortality rates To date, the most effective method for early detection of
breast cancer has been x-ray mammography for which the screen/film (SF) technique has been
the gold standard. Digital mammography has been proposed as a substitute for film
mammography given the benefits inherent to digital technology. The purpose of our study was
to compare the technical performance of digital mammographic and screen-film mammography.
A PMMA phantom with objects to simulate breast structures. For the screen/film (SF) technique
the results showed that 54% mammography units did not achieve the minimum acceptable
performance as far the image quality. Besides, 67% services showed inadequate performance
in their processing systems, which had significant influence on the image quality. At the mean
glandular dose only 44% of digital systems evaluated were compliant in all thicknesses of
PMMA. The Dg was 60 % higher than in screen/film systems
.