The aim of the study was to validate the ability of electrical impedance tomography (EIT) to detect local changes in air content, resulting from modified ventilator settings, by comparing EIT findings with electron beam computed tomography (EBCT) scans obtained under identical steady-state conditions. The experiments were carried out on six anesthetized supine pigs ventilated with five tidal vo...

The task of the image reconstruction in Electrical Impedance Tomography (EIT) is highly ill-posed inverse problem. The level set method with the gradient technique is established model for our numerical problem. Interfaces between subdomains with constant conductivities are represented by the level set function. Moreover, only one function is needed to represent any numbers of phases. The itera...

Electrical impedance tomography (EIT) is a radiation-free imaging method. Canonically, in lung EIT, 16 electrodes are placed horizontally on the thorax skin. By injecting currents through electrodes attached to the skin, a set of induced voltage measurements can be collected. The conductivity distribution on the chest plane can be obtained from these electrical boundary conditions. It has been ...

A WO dimensional. 16-electrode Electrical Impedance Tomography (EIT) system has been simulated using PSPICE to determine whether EIT can be used as a screening technique for early breast cancer detection. Simulation results show that a tumor of area of 1% of the cross-sectional breast model area produces more than 4% variation in the voltage magnitude at the surface electrodes when compared to ...

Electrical impedance tomography (EIT) estimates an image of change in electrical properties within a body from stimulations and measurements at surface electrodes. There is significant interest in EIT as a tool to monitor and guide ventilation therapy in mechanically ventilated patients. In lung EIT, the EIT inverse problem is commonly linearized and only changes in electrical properties are re...

Imaging of neuronal depolarization in the brain is a major goal in neuroscience, but no technique currently exists that could image neural activity over milliseconds throughout the whole brain. Electrical impedance tomography (EIT) is an emerging medical imaging technique which can produce tomographic images of impedance changes with non-invasive surface electrodes. We report EIT imaging of imp...

PURPOSE Prostate cancer ranks as one of the most common malignancies and currently represents the second leading cancer-specific cause of death in men. The current use of single modality transrectal ultrasound (TRUS) for biopsy guidance has a limited sensitivity and specificity for accurately identifying cancerous lesions within the prostate. This study introduces a novel prostate cancer imagin...

Most reconstruction algorithms in electrical impedance tomography (EIT, ERT and ECT) are known to suffer from the computational costs of calculating the Jacobian (also known as sensitivity matrix). In this paper we review and slightly modify the adjoint fields technique already widely used in electromagnetic imaging, diffuse optical and ultrasound tomography, which enables the reconstruction of...

Electrical Impedance Tomography (EIT) is known as non-invasive method to detect and classify the abnormal breast tissues. Reimaging conductivity distribution within an area of subject reveal tissues inside that area. In this work, we have created a very low-cost system with simple 16-electrode phantom for doing research purposes. The EIT data were measured reconstructed EIDORS software.