Name: Alexander Karpov

Email: kb9@mif.yar.ru

CompanyName: Clinical Hospital #9, Yaroslav

Country: Russia

Abstract: Electroimpedance measurements of mammary glands
in postmenopause.
A. Karpov*, **O. Trochanova, V. Cherepenin***, A. Korjenevsky***,
V. Kornienko***,
*Clinical Hospital N9, Yaroslavl, Russia
** Yaroslavl State Medical Academy, Russia
***Institute of Radioengineering and Electronics of Russian Academy of Sciences
The purpose of the present article is revealing difference in the electroimpedance
image of mamma for healthy, at diseases of mamma and at tumours of mamma for
the women in postmenopause (age is higher than 50-55 years). 54 women took part
in the research, we define three clinical groups: the first group -16 healthy
women, second group - 14 women with mastopathy, third group - 24 women with
tumours of mammary glands. The third group separated into two subgroups:
3а- 3 women with benign tumours of mammas and 3b- 21 women with malignant
tumours. For the examination procedurewe used new device - 256-electrode
electroimpedance one-frequency (50 kHz) mammograph, Breast Cancer Detection
Device (BCDD). The computer scanning of mammae was make through every 8 mm on
depth up to 6 cm (seven planes of scanning). The requests to an estimation of
the electroimpedance image of mamma in norm and in pathology are indicated. We
did qualitative and quantitative estimation of the electroimpedance image of
mammas for healthy women. We defined the conductivity changes of mammas in the
dependence of age of the healthy women. The coefficient of correlation (r)
between age and conductance has constituted as 0,60. The peculiarity of the
electroimpedance image of mammas for the women with mastopathy and tumours of
mamma are shown. We used a Student criterion for comparison of conductivity
changes of mammary glands in different clinical groups. We also defined, that
electroimpedance mammograms received from the women 1, 2 and 3 clinical groups,
have not only visual differences, but also statistically important differences
in the conductivity. The article is illustrated by electroimpedance mammograms
and tables.

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