Tzu-Jen Kao et al 2006 Physiol. Meas. 27 S1 doi:10.1088/0967-3334/27/5/S01
Tzu-Jen Kao1, D Isaacson2, J C Newell1 and G J Saulnier3
Show affiliationsA 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.
87.63.Pn Electrical impedance tomography (EIT)
87.19.R- Mechanical and electrical properties of tissues and organs
Issue 5 (May 2006)
Received 31 October 2005, accepted for publication 3 January 2006
Published 18 April 2006
Tzu-Jen Kao et al 2006 Physiol. Meas. 27 S1
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