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Modifying Electrical Impedance Tomography System 2

Paper review(1) purpose. From :R. A. Stiz, P. Bertemes-Filho, A. Ramos, V. C. Vincence. Wide Band Howland Bipolar Current Source using AGC Amplifier IEEE LATIN AMERICA TRANSACTIONS, VOL. 7, NO. 5, SEPTEMBER 2009 Purpose Optimizing the output impedance (Zout) and voltage controlled

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Modifying Electrical Impedance Tomography System 2

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    1. Modifying Electrical Impedance Tomography System (2) Presenter : Yu-Chun Hua Adviser : Dr. Ji-Jer Huang Date : 99.12.09

    2. Paper review(1) purpose From :R. A. Stiz, P. Bertemes-Filho, A. Ramos, V. C. Vincence. “Wide Band Howland Bipolar Current Source using AGC Amplifier “IEEE LATIN AMERICA TRANSACTIONS, VOL. 7, NO. 5, SEPTEMBER 2009 Purpose Optimizing the output impedance (Zout) and voltage controlled current source (VCCS) In this system, it uses a current source balanced (also called "bipolar“) Automatic gain control (AGC) : ?????????

    3. Paper review(1) materials and methods Howland Circuit

    4. Paper review(1) materials and methods

    5. Paper review(1) results

    6. Paper review(2) purpose From: Tushar Kanti Bera and J. Nagaraju ?” A Simple Instrumentation Calibration Technique for Electrical Impedance Tomography (EIT) Using A 16-Electrode Phantom ” 5th Annual IEEE Conference on Automation Science and Engineering Bangalore, India, August 22-25, 2009 Purpose Intended to investigate the phantom responses for different electrode geometry Electrode array position in bathing solution column and the instrumentation is calibrated accordingly

    7. Paper review(2) materials and methods Instrumentation(VCO) EIT-Phantom Forward Solution with Forward Solver Boundary Potentials Measurements

    8. B. EIT-Phantom

    9. C. Forward Solution with Forward Solver Forward Problem (FP) is the basis of EIT and it is essentially to be solved to calculate the boundary potential for estimating the conductivity update (?s) for each iteration in Inverse Problem (IP) . Studying the FP, for an EIT system, the instrumentation error can be detected to eliminate the noise in the voltage signal for better image resolution .

    10. Equation

    11. Equation

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