Medical Electronic Engineering Department, Fourth Military Medical University, Xi'an 710032, China.
Ann Biomed Eng. 2010 Jun;38(6):2032-9. doi: 10.1007/s10439-010-0053-z. Epub 2010 May 1.
Low, uniform, and stable electrode-skin impedance is required to achieve good performance of the electrode-skin interface for electrical impedance scanning (EIS) examination. This can be used to measure the real impedance distribution of breast tissue beneath the skin. In this study, the gel interface, the cotton fine grid thin layer (CFGTL) interface, and the hydrogel interface were compared. Experiments were conducted to assess the influence of each interface on the multi-frequency EIS data and their capacity to retain moisture. Results showed that the CFGTL and hydrogel interfaces decreased contact impedance and made the impedance between the electrodes and the breast skin more even and stable. The Cole-Cole model was also used to fit the multi-frequency EIS data. The results demonstrated that the CFGTL and hydrogel interfaces were advantageous for measuring the impedance of the breast tissue under the gel interface. In general, the CFGTL and hydrogel interfaces had good contact with the skin, and both interfaces were proper choices for EIS examination at present. The hydrogel interface was a better choice for our new EIS system.
低、均匀且稳定的电极-皮肤阻抗对于实现电阻抗扫描（EIS）检查中电极-皮肤界面的良好性能是必需的。这可用于测量皮肤下乳房组织的实际阻抗分布。在这项研究中，比较了凝胶界面、棉细网格薄层（CFGTL）界面和水凝胶界面。进行了实验以评估每个界面对多频 EIS 数据及其保水能力的影响。结果表明，CFGTL 和水凝胶界面降低了接触阻抗，使电极和乳房皮肤之间的阻抗更加均匀和稳定。还使用科尔-科尔模型拟合多频 EIS 数据。结果表明，CFGTL 和水凝胶界面有利于测量凝胶界面下乳房组织的阻抗。总的来说，CFGTL 和水凝胶界面与皮肤具有良好的接触，目前这两种界面都是 EIS 检查的合适选择。水凝胶界面是我们新的 EIS 系统的更好选择。
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