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We present rigorous solutions of scattering problems involving healthy red blood cells (RBCs) and diseased RBCs with deformed shapes. Scattering cross-section (SCS) values for different RBC shapes and different orientations are obtained accurately and efficiently using a sophisticated simulation environment based on the electric and magnetic current combined-field integral equation and the multilevel...
Finite element modeling of the skin is useful to study the electrical properties of cutaneous tissues and gain a better understanding of the current distribution within the skin. Such an epithelial finite element model comprises extremely thin structures like cellular membranes, nuclear membranes, and the extracellular fluid. Meshing such narrow spaces considerably increases the number of elements...
The appearance of non-resolving non-path-related symptomatology following some low voltage (120/240 volt) electrical contacts has proven to be a scientific puzzlement. The problem is that the best of our diagnostic technology is not yet technologically advanced enough to image the mechanism of injury. Still, in the context of this wealth of data, by inference, it is more likely than not that the underlying...
The cell clinics microsystem is a platform for long-term cell monitoring for such applications as cell-based sensing. This system includes microvials with individually actuated lids, integrated circuits that monitor cells and control the position of the vial hinges, and an automated cell loading mechanism that relies on dielectrophoresis to manipulate individual cells into the vials
We have developed a three-dimensional computational wedge model of canine cardiac ventricular wall electro-physiology that incorporates biophysically detailed, spatially heterogeneous excitation, and high-resolution geometry and fibre orientation. Isolated cell model electrophysiological characteristics reproduce the experimentally observed characteristics under control conditions, and under conditions...
Methods that can reveal the electrical properties of cells have the potential to provide new information of cell anatomy and cell function and could play a useful role in several medical applications such as cancer diagnosis. Electrical impedance imaging is an imaging modality that estimates the spatial variation of the impedance at the interior of an object from electrical measurements made on its...
For the gentle and non-destructive characterisation of small tissue samples, non-invasive methods are required for biotechnological applications and medical diagnostics. One approach is the characterisation of small tissue samples by impedance spectroscopy using a measuring capillary. In this paper, the applicability of a capillary measuring system to record the impedance of a biological sample over...
Non-invasive multi-frequency measurements of transcephalic impedance, both reactance and resistance, can efficiently detect cell swelling of brain tissue and can be used for early detection of threatening brain damage. We have performed experiments on piglets to monitor transcephalic impedance during hypoxia. The obtained results have confirmed the hypothesis that changes in the size of cells modify...
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