Design of Electrical Impedance Tomography (EIT) for Medical Imaging Application

摘要

The rise of imaging in medical field has boost the progress of new imaging method and modality that safer, cheaper, and faster. Electrical Impedance Tomography (EIT) is one of imaging modalities that provides safe medical imaging through non ionizing method. The downside of the EIT method is the complex algorithm needed to produce imaging result and low resolution. This study is aimed to provide a simple EIT imaging system that are easily used and developed. The proposed system designed in this study is a Matlab^TM and Arduino based imaging system, which are then tested under several observation object scenario. The imaging results that are produced by the system are able to represent the varying observational objects structure. Impedance measurement method that is implemented in the proposed system is a two-point technique using 8 electrodes and 16 electrodes with a frequency of 50 kHz. The main observation object of this system is an acrylic cup filled with tap water that has a TDS (Total Dissolved Solids) of 300 ppm. The proposed EIT imaging system is considered as a simple construction that is able to recognize two different objects according to its different impedance values.