Title :
High output-impedance current source for electrical impedance tomography
Author_Institution :
Coll. of Bio-Inf., Chongqing Univ. of Posts & Telecommun., Chongqing, China
Abstract :
This paper emphasized on analyzing the frequency-domain and the time-domain characteristic of the enhanced Howland circuit for electrical impedance tomography, and studied the influencing factor in depth. Firstly, the output current, impedance and their influencing factors were discussed in detail by numerical simulation. Secondly, it simulated the frequency characteristic of current source, and finally, designed the experiment to measure the output current and impedance. Simulation and experiment indicated that it could improve the performance by selecting the suitable amplifier, peripheral components to meet requirements of electrical impedance tomography.
Keywords :
amplifiers; electric impedance imaging; frequency-domain analysis; numerical analysis; time-domain analysis; amplifier; electrical impedance tomography; enhanced Rowland circuit; frequency-domain characteristic; high output-impedance current source; numerical simulation; peripheral component; time-domain characteristic; Current measurement; Educational institutions; Frequency domain analysis; Impedance; Resistors; Tomography; Electrical impedance tomography (EIT); current source; output impedance;
Conference_Titel :
Biomedical Engineering and Informatics (BMEI), 2011 4th International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-9351-7
DOI :
10.1109/BMEI.2011.6098486
