A phantom for electrical impedance tomography

被引：34

作者：

Griffiths, H. ^{[1
]}

机构：

[1] Department of Medical Physics and Bioengineering, University Hospital of Wales, Cardiff CF4 4XW, United Kingdom

来源：

Clinical Physics and Physiological Measurement | 1988年 / 9卷 / SUPPL. A期

关键词：

Biomedical Equipment--Testing - Data Processing--Data Acquisition - Electric Measurements--Impedance - Image Processing--Reconstruction - Models--Applications;

D O I：

10.1088/0143-0815/9/4A/003

中图分类号：

学科分类号：

摘要：

A method has been developed for constructing phantoms for electrical impedance tomography (EIT). A mesh of resistors is soldered to pins in a matrix board and forms a physical realization of a finite element numerical model. To simulate different body tissues, changes in the apparent electric conductivity and permittivity can be introduced at a particular location within the phantom by shunting the resistors in the mesh with additional resistors and capacitors. The phantom was used to test an EIT system employing phase-sensitive detection to separate the real and imaginary parts of the peripheral electric potentials. From the measurements images of conductivity and permittivity were reconstructed using an algorithm developed recently. The phantom has good mechanical strength and is electrically stable. The design could easily be reproduced and distributed to other centers developing similar EIT systems to enable testing on a common basis.

引用

页码：15 / 20