A flexible low-cost, high-precision, single interface electrical impedance tomography system for breast cancer detection using FPGA

Zarafshani, Ali, Huber, Nicolas, Béqo, Nevis, Tunstall, Benjamin, Sze, Gerald, Chatwin, Chris and Wang, Wei (2010) A flexible low-cost, high-precision, single interface electrical impedance tomography system for breast cancer detection using FPGA. Journal of Physics: Conference Series, 224 (1). 012169. ISSN 1742-6588

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Abstract

Typically, in multi-frequency Electrical Impedance Tomography (EIT) systems, a current is applied and the voltages developed across the subject are detected. However, due to the complexity of designing stable current sources, there has been mention in the literature of applying a voltage to the subject whilst measuring the consequent current flow. This paper presents a comparative study between the two techniques in a novel design suitable for the detection of breast cancers. The suggested instrument borrows the best features of both the injection of current and the application of voltage, circumventing their limitations. Furthermore, the system has a common patient-electrode interface for both methodologies, whilst the control of the system and the necessary signal processing is carried out in a field programmable gate array (FPGA). Through this novel system, wide-bandwidth, low-noise, as well as high-speed (frame rate) can be achieved.

Item Type: Article
Keywords: Breast Cancer; Breast cancer detection; Comparative studies; Current flows; Current sources; Electrical impedance tomography; Electrode interface; Frame rate; High-precision; High-speed; Low noise; Multi frequency; Novel design
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Subjects: Q Science > QA Mathematics
Q Science > QA Mathematics > QA0075 Electronic computers. Computer science
R Medicine > R Medicine (General) > R856 Biomedical engineering. Electronics. Instrumentation
T Technology
T Technology > TK Electrical engineering. Electronics Nuclear engineering
T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800 Electronics
Depositing User: Chris Chatwin
Date Deposited: 30 Aug 2012 09:16
Last Modified: 14 Mar 2017 01:57
URI: http://sro.sussex.ac.uk/id/eprint/40505

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