ELECTRICAL IMPEDANCE TOMOGRAPHY WITH VELOSTAT

• Main Author: Jaka Wimbang W, Muhammad
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/35844
• Institution: Institut Teknologi Bandung

Imaging is a non-invasive method that is used to see the inferior or functional of the human body. Electrical impedance tomography is one kind of imaging method. Electrical impedance tomography is one of the safest methods and costs less than other imaging methods. The electrical impedance tomography method is used to read the difference in conductivity on the tissue. Electrical impedance tomography method can be used on objects that have different conductivity in them. One of the material that has differences in conductivity is velostat. Velostat is a pressure sensor which when pressure applied the resistance drop. In this study discussing the use of velostat as an object detector. The object that is detected is a weighing scale placed in the middle of velostat surface. The data retrieval process starts with injecting a current or voltage source on a pair of electrodes and measures the voltage on all existing electrodes. There are several configurations for the application. The best configuration is produced from adjacent injection, adjacent measurement (ADAD) after the calculation of average of measurement results from 100 voltage data sets. This voltage data consists of homogeneous and inhomogeneous data which is carried out in steady state. Homogeneous and inhomogeneous data is reconstructed using EIDORS software and the results are processed to seek the quality of the image. The processing is done by calculate the signal to noise ratio (SNR) and standard deviation. The biggest SNR is 47.64 dB from the ADAD configuration and the standard deviation ranges from 0-85.