Mark J Hamamura et al 2006 Phys. Med. Biol. 51 2753 doi:10.1088/0031-9155/51/11/005
Mark J Hamamura, L Tugan Muftuler, Ozlem Birgul and Orhan Nalcioglu
Show affiliationsIn magnetic resonance electrical impedance tomography (MREIT), currents are applied to an object, the resulting magnetic flux density measured using MRI and the conductivity distribution reconstructed using these MRI data. In this study, we assess the ability of MREIT to monitor changes in the conductivity distribution of an agarose gel phantom, using injected current pulses of 900 µA. The phantom initially contained a distinct region of high sodium chloride concentration which diffused into the background over time. MREIT data were collected over a 12 h span, and conductivity images were reconstructed using the iterative sensitivity matrix method with Tikhonov regularization. The results indicate that MREIT was able to monitor the changing conductivity and concentration distributions resulting from the diffusion of ions within the agarose gel phantom.
87.63.Pn Electrical impedance tomography (EIT)
87.61.Tg Clinical applications
87.19.R- Mechanical and electrical properties of tissues and organs
Issue 11 (7 June 2006)
Received 9 February 2006, in final form 10 February 2006
Published 9 May 2006
Mark J Hamamura et al 2006 Phys. Med. Biol. 51 2753
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