Capacitance-Digital and Impedance Converter as Electrical Tomography Measurement System for Biological Tissue
M. I. Ikhsanti, R. Bouzida, S. K. Wijaya, I. Muttakin, Rohmadi, W. P. Taruno
International Symposium on Biomedical Engineering (ISBE), Jakarta, 2016
 Dept. Physics, F. Mathematics and Natural Science, University of Indonesia
 CTECH Labs Edwar Technology
Corresponding Author Email: email@example.com
This research aims to explore the feasibility of capacitance-digital converter and impedance converter for measurement module in electrical
capacitance tomography (ECT) system. ECT sensor used was a cylindrical sensor having 8 electrodes. Absolute capacitance measurement
system based on Sigma Delta Capacitance-to-Digital-Converter AD7746 has been shown to produce measurement with high resolution.
Whereas, capacitance measurement with wide range of frequency is possible using Impedance Converter AD5933. Comparison of
measurement accuracy by both AD7746 and AD5933 with reference of LCR meter was evaluated. Biological matters represented in water and
oil were treated as object reconstructed into image using linear back projection (LBP) algorithm.
capacitance-to-digital converter; impedance converter; electrical capacitance tomography; ECT; biological tissue