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  • Electrical impedance scanning systems used to produce real-time images of the breast. These systems consist of a low-voltage electrical source (typically 1 to 2.5 V), an electrode attached to the source which is placed on the patient\'s arm, a second electrode included in a probe to be placed against the breast, and an electronic unit that records and displays the signal as an image. Cytological and histological changes in cancerous tissue cause a significant change in its electrical impedance, showing cancers as bright spots on a gray background. Mammographic electrical impedance scanning systems are used as an adjunct test for ambiguous mammograms to facilitate early diagnostics and reduce the number of biopsies.
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