XWH - 04 - 1 - 0446 TITLE : Comparison of the Specificity of MR - EIT and Dynamic Contrast - Enhanced MRI in Breast Cancer
نویسنده
چکیده
In 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. (Some figures in this article are in colour only in the electronic version)
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تاریخ انتشار 2006