A 9.6 mW/Ch 10 MHz Wide-bandwidth Electrical Impedance Tomography IC with Accurate Phase Compensation for Breast Cancer Detection

Abstract

A 10MHz wide-bandwidth Electrical Impedance Tomography (EIT) IC is proposed for compact and high-precision breast cancer detection system. The proposed IC has three key features: 1) wide dynamic range LNA (WDR-LNA), enabling low noise impedance measurements for the high-resolution imaging, 2) reconfigurable front-end architecture (RFA) to remove external multiplexer for the compact system integration, and 3) phase compensation loop (PCL) to efficiently correct the phase error, which is the primary challenge in wide-bandwidth EIT system. Thanks to the key features, the proposed prototype breast cancer detection system with the dedicated EIT IC can operate up to 10 MHz with a small phase error of 4.32 degree, eventually can detect a small size target object of 0.5 cm and verified with the phantom experiments.