BACKGROUND For electroporation-based therapies, accurate modeling of the electric field distribution within the target tissue is important for predicting the treatment volume. In response to conventional, unipolar pulses, the electrical impedance of a tissue varies as a function of the local electric field, leading to a redistribution of the field. These dynamic impedance changes, which depend ...

The high voltage capability, compact size, and high output impedance of piezoelectric transformers makes them very attractive primary high voltage supplies for charged particle beam applications. This paper will present and contrast recent results utilizing piezoelectric transformers to accelerate electrons and ions, to produce x-rays and neutrons for imaging and active interrogation and to pro...

Image Reconstruction in Electric Impedance Tomography (EIT) is an ill-posed problem and regularization techniques are needed in order to obtain meaningful images. Though these techniques allows successful reconstruction, they limit the spatial resolution into the reconstructed image. The ability of reconstruction fast spatial transition in the reconstructed conductivity is important in various ...

The goal of our investigation was to explore the level membrane permeabilization in plant and animal food matrices (potato, apple, chicken) as resulting from subjecting these pulsed electric field treatment whereby we employed different assessment methods (electrical impedance spectroscopy, current-voltage measurements, magnetic resonance imaging). Our study performed using a number amplitudes ...

The Electrical Transimpedance Scanning is a new modality of image based on the differences in electrical properties of tissues. It is an extremely promising technique to complement other conventional image examinations. Areas presenting abnormalities and/or malignant neoplasia evidence exhibit conductive changes that cause an impedance variation between cancerous ant health tissues. Since there...

The influence of the ions on the electrochemical impedance of a cell is calculated in the framework of a complete model in which the fractional drift-diffusion problem is analytically solved. The resulting distribution of the electric field inside the sample is determined by solving Poisson's equation. The theoretical model to determine the electrical impedance we are proposing here is based on...

An object is cloaked if its presence cannot be detected by an observer using electromagnetic or other forms of imaging. In fact, the observer should not notice that cloaking is even occurring. Cloaking has a long history in science fiction, but recent developments have put the idea on a firmer mathematical and physical basis. Suppose that an observer seeks to image some bounded region Ω in spac...