A 3D Reconstruction Algorithm for EIT Using a Handheld Probe for Breast Cancer Detection

Overview

Journal Physiol Meas

Specialties Biomedical Engineering
Biophysics
Physiology

Date 2006 Apr 26

PMID 16636401

Citations 7

Authors

Tzu-Jen Kao

D Isaacson

J C Newell

G J Saulnier

Affiliations

Soon will be listed here.

Abstract

A 3D reconstruction algorithm for electrical impedance tomography is presented for determining the distribution of electrical properties inside the body, given electrical measurements made on the surface. A linearized reconstruction algorithm using planar electrode arrays in a handheld probe geometry developed by Mueller et al (1999 IEEE Trans. Biomed. Eng. 46 1379-86) has been refined and extended in this paper. This algorithm is based on linearizing the conductivity about a constant value. We have extended the distance below the electrodes at which a target can be imaged by using a combination of two regularization schemes and a weighted mesh. An appropriate combination of Tikhonov and NOSER regularization produces satisfactory static images of a 2 cm cube placed 2 cm below the array, and difference images of a 1 cm cube 4 cm away from the array. The weighted mesh allows use of fixed regularization parameters for all depths of the target.

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