Electrical impedance tomography (EIT) merupakan salah satu metode citra yang didasarkan pada distribusi konduktivitas listrik suatu objek. Hasil rekonstruksi dengan teknik EIT sangat bergantung kemampuan sistem instrumentasinya (hardware) untuk menghasilkan data akurat. Salah bagian penting dalam membangun adalah sumber sinyal bolak balik biasa disebut Voltage-controlled oscillator (VCO). Pada ...

Steam-assisted gravity drainage (SAGD) is a technique that has been developed to efficiently extract bitumen from deep reservoirs. We propose using electrical impedance tomography (EIT) for real-time monitoring of SAGD wells to maintain optimal operating conditions. Several electrode configurations along the pipelines and measurement strategies are presented and compared.

Electrical impedance tomography (EIT), a non-invasive technique used to image the electrical conductivity and permittivity within a body from measurements taken on the body's surface, could be used as an indicator for breast cancer. Because of the low spatial resolution of EIT, combining it with other modalities may enhance its utility. X-ray mammography, the standard screening technique for br...

In the previous issue of Critical Care, we read with interest the article by Blankman and colleagues [1], who studied the performance of various electrical impedance tomography (EIT)-derived measures in detecting the ‘best’ positive end-expiratory pressure. The aim of that study is relevant; however, the article contains some methodological inaccuracies that need to be clarified. One of the EIT...

Objective: A model is presented to evaluate the viability of using electrical impedance tomography (EIT) with a nerve cuff to record neural activity in peripheral nerves. Approach: Established modelling approaches in neural-EIT are expanded on to be used, for the first time, on myelinated fibres which are abundant in mammalian peripheral nerves and transmit motor commands. Main results: Fibre i...

Electrical impedance Tomography (EIT) can produce real-time images of conductivity variations associated with respiratory and cardiac cycles. We report the development of a new multi-frequency EIT system called the KHU Mark2.5. It has new features such as flexible electrode configurations to accommodate application-specific requirements, multiple independent current sources and voltmeters for f...

Electrical Impedance Tomography (EIT) has the potential to produce images during epileptic seizures. This would improve the accuracy of the localization of epileptic foci in patients undergoing presurgical assessment for curative neurosurgery. It has already been shown that impedance increases by up to 22% during induced epileptic seizures in animal models, using cortical or implanted electrode...

We report on the development of a new software package for image reconstruction in threedimensional Electrical Impedance Tomography (EIT). Designed for large-scale computations, the software includes mesh generation utilities, a simulator of the quasi-static electrical potential fields based on finite elements and regularized inversion algorithms. We describe in brief some of its main functions...

The first step of medical treatment is the diagnosis. This investigation is focused on some fundamental mathematical and physical characteristics of such diagnostic tool, namely the Electrical Impedance Tomography (EIT), a subject of great scientific and public interest (Holder, 2005; Brown, 2003; Lionheart, 2004). The basic EIT’s assumption is that different biological tissues can be distingui...

Regional cerebral blood flow and blood volume changes that occur during human brain activity will change the local impedance of that cortical area, as blood has a lower impedance than that of brain. Theoretically, such impedance changes could be measured from scalp electrodes and reconstructed into images of the internal impedance of the head. Electrical Impedance Tomography (EIT) is a newly de...