Paper Infomation
Open Electrical Impedance Tomography based on Primal Dual-Interior Method with Total Variation Regularization
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Author: Shijun Bu, Wei Zhang, Min Huang, Wenhan Huang
Abstract: Multi-channel electrical impedance tomography (EIT) is a kind of low cost technique that can be used to dynamically monitor the physiological signals in a long term. We usually need put electrodes around the measured object in closed electrical impedance tomography (CEIT). But this has some limitations in practical applications, such as intraperitoneal hemorrhage caused by abdominal extrusion and sometimes the patients cannot be moved to arrange electrodes around their abdomens evenly. In addition, in the clinical monitoring, it will cause discomfort to put electrodes on patients’ back. Aiming at solving this problem, we have put forward a new measure mode called the open electrical impedance tomography (OEIT) where electrodes are only put by one side of the measured object. Resistivity images are reconstructed by the primal dual-interior point method (PDIPM) with total variation regularization. First, we build the models of CEIT and OEIT. Next, we clarify the implementation method of PDIPM algorithms. Finally, we show the reconstructed images by different models. Results show that opened EIT has good resolution and positioning accuracy as well as the closed EIT.
Keywords: Open electrical Impedance Tomography; Total Variation; Primal Dual-interior Point method; Opened Measure
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