نتایج جستجو برای: electrical impedance tomography eit
تعداد نتایج: 402841 فیلتر نتایج به سال:
In this paper the forward problem of Electrical Impedance Tomography (EIT) is considered. To achieve a flexible treatment of boundaries, the original two-dimensional domain is extended to a simple square one and essential boundary conditions are imposed by means of Lagrange multipliers, resulting in a saddle point system. For discretisation, we employ a biorthogonal B-Spline wavelet basis for w...
ABSTRAKElectrical Impedance Tomography (EIT) merupakan teknik pencitraan non-invasif yang merekonstruksi distribusi konduktivitas dari suatu objek. Hasil rekonstruksi citra dengan EIT sangat bergantung pada kemampuan sistem instrumentasinya untuk menghasilkan data akurat. Rangkaian filter salah satu bagian terpenting dalam EIT. Pada penelitian ini telah dirancang dan disimulasikan empat jenis r...
Electrical Impedance Tomography (EIT) is a non-invasive and low-cost functional imaging technique that measures thoracic impedance. Until now, it was primarily used to reveal respirationrelated changes in the lungs. However, recent work has shown the feasibility of using this technology to monitor hemodynamic parameters. In particular, mean arterial blood pressure can be estimated via EIT, give...
Electrical Impedance Tomography (EIT) finds the conductivity (in the case of the quasistatic approximation of Maxwell’s equations, for a linear and isotropic medium and a sufficiently small excitation frequency) distribution in a given model of a body which reproduces the boundary measurements of currents and potentials on electrodes attached to that body (Mello et al. [2]). The conductivity di...
We report on the results of an EIT phantom study using an experimental tank with agar conductivity inhomogeneities, used to verify the accuracy of both a boundary element method (BEM) forward model and a non-linear inverse solution based on the BEM model. We introduce the shunt electrode model into the BEM equations for greater accuracy and derive the associated Jacobian for the inverse problem...
We show how to eliminate the error caused by an incorrectly modeled boundary in electrical impedance tomography (EIT). In practical measurements, one usually lacks the exact knowledge of the boundary. Because of this the numerical reconstruction from the measured EIT–data is done using a model domain that represents the best guess for the true domain. However, it has been noticed that the inacc...
The paper deals with the issues of energy consumption complexes three-dimensional electrical impedance tomography. designs stationary and wearable devices are considered. Their block diagrams developed main elements considered versions described, their contribution to total EIT is estimated. Consumers critical for one or another performance indicated.
INTRODUCTION As it becomes clear that mechanical ventilation can exaggerate lung injury, individual titration of ventilator settings is of special interest. Electrical impedance tomography (EIT) has been proposed as a bedside, regional monitoring tool to guide these settings. In the present study we evaluate the use of ventilation distribution change maps (DeltafEIT maps) in intensive care unit...
Early detection of Breast Cancer is currently emerging as a big clinical entity requiring a non invasive, radiation less, harmless, cost effective diagnostic technique. Survival is improved if detected early. Breast Cancer is the second most common cancer in India. Health corporate system of India is urgently requiring a cost effective, noninvasive novel technique like “Electrical Impedance Tom...
Electrical impedance tomography (EIT) is an attractive method for clinically monitoring patients during mechanical ventilation, because it can provide a non-invasive continuous image of pulmonary impedance which indicates the distribution of ventilation. However, most clinical and physiological research in lung EIT is done using older and proprietary algorithms; this is an obstacle to interpret...
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