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PubMed · 16636401

A 3D reconstruction algorithm for EIT using a handheld probe for breast cancer detection.

Tzu-Jen Kao·D Isaacson·J C Newell·G J Saulnier
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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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Breast NeoplasmsDiagnosis, Computer-AssistedElectric ImpedanceEquipment DesignEquipment Failure AnalysisHumansImaging, Three-DimensionalPhantoms, ImagingPlethysmography, ImpedanceReproducibility of ResultsSensitivity and SpecificityTomographyTransducersConference ProceedingsEvaluation StudyResearch Support, N.I.H., ExtramuralResearch Support, U.S. Gov't, Non-P.H.S.

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Tzu-Jen Kao, D Isaacson, J C Newell, G J Saulnier. 2006-04-18. A 3D reconstruction algorithm for EIT using a handheld probe for breast cancer detection.. https://doi.org/10.1088/0967-3334%2F27%2F5%2Fs01

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