How Does ZedScan Work?
- ZedScan uses Electrical Impedance Spectroscopy (EIS) to differentiate between normal, pre-cancerous and cancerous tissue on the cervix according to its electrical properties
- These properties are known to change during the development of neoplasia, with more dysplastic tissue exhibiting a reduced resistance to the flow of current as a result of physical changes in its structure
- ZedScan measures the electrical impedance at 14 different frequencies which creates a characteristic spectrum according to the structure of the tissue (see Fig. 1)
- Each reading is given a nominal value which is compared to a reference, providing a semi-quantitative, reproducible assessment of the cervix
Fig.1: Diagram showing different EIS spectra for cervical tissue