BACKGROUNDS Breast cancer presents a serious medical and social problem worldwide. Early detection is key to effective breast cancer treatment. Therefore, scientists are consistently looking for new diagnostic techniques that would be more efficient, easy to use and safe for the patient. The main task of this study was to evaluate the feasibility of a novel low-cost non-invasive technique calle...

The inverse problem of Electrical Impedance Tomography (EIT) is that of imaging a spatially varying, complex admittivity function γ(x, ω) in a domain Ω ⊂ I R (n = 2 or 3), given measurements of low frequency ω alternating electrical currents and potentials at the boundary ∂Ω. The real and imaginary parts of admittivity γ(x, ω) are the electrical conductivity σ(x) and ω (x), respectively, where ...

Electrical impedance tomography (EIT) is a technique to reconstruct the conductivity distribution of an inhomogeneous medium by injecting currents at the boundary of an object and measuring the resulting changes in voltage. The sensitivity matrix of EIT is calculated with a selected reference conductivity distribution, which is time-consuming. However, the sensitivity matrix will change with th...

where PV is the volume of blood pumped, that is given by the difference between the end-diastolic volume (EDV) and the end-systolic volume (ESV). Cardiac ejection fraction is a relevant parameter because it is highly correlated to the functional status of the heart. To determine the EF, different non-invasive techniques can be used, like echocardiography, cardiac magnetic resonance and computed...

An instrumental electrode model (IEM) capable of describing the performance of electrical impedance tomography (EIT) systems in the MHz frequency range has been proposed. Compared with the commonly used Complete Electrode Model (CEM), which assumes ideal front-end interfaces, the proposed model considers the effects of non-ideal components in the front-end circuits. This introduces an extra bou...

The differentiation of haemorrhagic from ischaemic stroke using electrical impedance tomography (EIT) requires measurements at multiple frequencies, since the general lack of healthy measurements on the same patient excludes time-difference imaging methods. It has previously been shown that the inaccurate modelling of electrodes constitutes one of the largest sources of image artefacts in non-l...

Pulmonary function tests are used to assess the severity of obstructive and restrictive lung diseases. These tests provide information on the whole lung considered as one compartment and can be used to globally describe the physical properties of flow resistance R and compliance C, but do not yield regional information. Electrical impedance tomography (EIT) is widely used in clinical research r...

Patients with bladder dysfunction are unable to perceive volume and urinate spontaneously, hence usually require catheterization. Personalized catheterization can effectively reduce the risk of urinary tract infections caused by Electrical impedance tomography (EIT) provide an effective tool for personalized monitoring volume. This study exploits fringe effect a 2D EIT sensor derive 3D volumetr...

This paper proposes a novel approach for measuring Electrical Impedance Tomography (EIT) of a living tissue in a human body. EIT is a non-invasive technique to measure two or three-dimensional impedance for medical diagnosis involving several diseases. To measure the impedance value electrodes are connected to the skin of the patient and an image of the conductivity or permittivity of living ti...